Generation Challenge Programme
GCP website		Integrated Breeding
IBP website		Sunset Blog
Sunset blog		   Connect with us GCP on Facebook GCP on Twitter GCP on LinkedIn Subscribe to GCP Newsletter Subscribe to GCP RSS feeds

A bout with drought and disease: Beans that beat the heat and odds in Zimbabwe

 Africa, Beans, Capacity building, Genomics, Legumes  2 Responses »
Feb 282013
 
Print Friendly

Drought stalks, some die
Despite the widespread cultivation of beans in Africa, yields are low, stagnating at between 20 and 30 percent of their potential. Drought brought about by climate change is the main culprit, afflicting 70 percent of Africa’s major bean-producing regions in Southern and Eastern Africa.Bean plant by R Okono

Today we turn the spotlight on Zimbabwe, where drought is a serious and recurrent problem. Crop failure is common at altitudes below 800 meters, and livestock death from shortage of fodder and water are all too common. In recent history, nearly every year is a drought year in these low-lying regions frequently plagued by delayed rains, as well as by intermittent and terminal drought.

The ‘battleground’ and ‘blend’
Zimbabwe is divided into five Natural Regions or agroecological zones. More than 70 percent of smallholder farmers live in Natural Region 3, 4 and 5, which jointly account for 65 percent of Zimbabwe’s total land area (293,000 km2). It is also here that the searing dual forces of drought and heat combine to ‘sizzle’  and whittle bean production.

The rains are insufficient for staple foods such as maize, and some of their complementary legumes such as groundnuts. In some areas where temperatures do not soar too high (less than 30oC), beans blend perfectly into the reduced rainfall regime that reigns during the growing season.

A deeper dig: the root of the matter

Godwill Makunde

Godwill Makunde

Research from Phase I of the Tropical Legumes I (TLI) project under GCP’s Legume Research Initiative showed that deep rooting is one of the ways to confer drought tolerance in common beans. High plant biomass at pod-filling stage also confers drought tolerance. “These important findings from TLI refined our breeding objectives, as we now focus on developing varieties combining deep roots and high plant biomass,” reveals Godwill Makunde (pictured), a bean breeder at Zimbabwe’s Crop Breeding Institute (CBI), which falls under the under the country’s Department of Research & Specialist Services. Zimbabwe is one the four target countries in Eastern and Southern Africa for GCP’s bean research (the other three being Ethiopia, Kenya and Malawi).

From America to Africa…the heat is on, so is the battle…

The battle is on to beat the heat: through the project, CBI received 202 Mesoamerican and Andean bean breeding lines from the reference set collection held by the International Center for Tropical Agriculture (CIAT, by its Spanish acronym). A ‘reference set’ is a sub-sample of existing germplasm collections that facilitates and enables access to existing crop diversity for desired traits, such as drought tolerance or resistance to disease or pests. The Institute also embarked on bringing in more techniques to breed for heat tolerance.

Kennedy Simango

Kennedy Simango

Drought, pests and disease
“We embraced mutation breeding in collaboration with the International Atomic Energy Agency, and we primarily look for heat tolerance in small-seeded beans,” says Kennedy Simango (pictured right and below), a plant breeder at CBI. “Preliminary results suggested that just like drought, the reproductive stages of common bean are when the crop is most sensitive to heat. Flower- and pod-drop are common. Yield components and yields are severely reduced. In addition, we also focus on developing pest- and disease-resistant varieties.”

 

Kennedy Simango at work a the Crop Breeding Institute.
Kennedy Simango at work a the Crop Breeding Institute.

The CBI project’s primary diseases and pests of focus are angular leaf spot (ALS), common bacterial blight (CBB), rust and bean stem maggot, and aphids. “This came from our realisation that drought co-exists with heat, diseases and pests,” Kennedy adds. “So, a variety combining drought, heat, disease and pest tolerance all together would increase common bean productivity under harsh environments or drought-prone areas.”

At first glance, piling up all these vital survival traits may appear insurmountable, but it is all feasible, thanks to advances in plant science. “Breeding methods are changing rapidly, and it is vital that we keep up with the technology,” says Kennedy.

The CBI team is using molecular breeding to identify drought-tolerant parents, and then cross them into preferred bean varieties to confer to the ‘offspring’ the best of both worlds – drought tolerance and market appeal.

All-round capacity and competence
GCP’s support does not stop at enabling access to breeding lines alone, or introduction to molecular breeding. “We got a lyophiliser, which is specialised equipment that enables us to extract DNA and send it for genotyping,” says Kennedy. “From the genotyping exercise, we hope to be able to trace the relationships among breeding lines so that we design better crossing programmes, and thereby maximise the diversity of our breeding lines. In addition, we hope to select recombinants carrying desirable genes in a short period of time, and at times without even needing to test them in the target environment.” GCP assists with genotyping through its Genotyping Support Service offered through the Integrated Breeding Platform.

For phenotyping, CBI has benefitted from a mobile weather station, a SPAD meter (for measuring chlorophyll content), a leaf porometer (for measuring leaf stomatal conductance) and water-marks (probes for measuring soil moisture).

Human resources have not been forgotten either. Godwill Makunde, a CBI bean breeder, is studying for a TLII-funded PhD in Plant Breeding at the University of the Free State, South Africa. A group of four scientists (Godwill and Kenedy,  plus Charles Mutimaamba, and Munyaradzi Mativavarira) are in GCP’s three-year Integrated Breeding Multi-Year Course (IB–MYC). The curriculum includes design of experiments, data collection, analysis and interpretation, molecular breeding and data management techniques. In addition, GCP also trains research technicians. For CBI, Clever Zvarova, Anthony Kaseke, Mudzamiri and Chikambure have attended this training. Their course also includes phenotyping protocols (data collection and use of electronic tablets in designing field-books). To date, CBI has received five tablets for digital data collection , of which two are outstanding.

Photo: CBI

Godwill doing what he does best: bean breeding.

Bringing it all together, and on to farms
But how relevant are all these breeder-focused R&D efforts to the farmer? Let’s review this in proper context: in the words of Mr Denis Mwashita, a small-scale farmer at the Chinyika Resettlement Scheme in Bingaguru, Zimbabwe, “Beans have always carried disease, but from the little we harvest and eat, we and our children have developed stomachs.”

“What Mr Mwashita means is that despite the meagre harvests, farm families fare better in terms of health and nutrition for having grown beans,” explains Godwill.

With this solid all-round support in science, working partnerships, skills and infrastructure, the CBI bean team is well-geared to breed beans that beat both heat and disease, thereby boosting yields, while also meeting farmer and market needs. Trials are currently underway to select lines that match these critical needs which are the clincher for food security.

“The Zimbabwe market is used to the sugar type, which is however susceptible to drought. We hope to popularise other more drought-tolerant types,” says Kennedy. “We plan to selected a few lines in the coming season and test them with farmers prior to their release. Our goal is to have at the very least one variety released to farmers by mid-2013.”

A noble goal indeed, and we wish our Zimbabwe bean team well in their efforts to improve local food security.

VIDEO: The ABCs of bean breeding in Africa and South America, with particular focus on Ethiopia, Kenya, Malawi and Zimbabwe

Related blogposts

Other links

 

 

Chickpeas on the map of champions in the genome world: Challenges, rewards… and ‘Rajeevs’

 Africa, Asia, Chickpeas, Genomics, Legumes  No Responses »
Jan 282013
 
Print Friendly

Today, Nature Biotechnology published the first-ever draft genome sequence map for a chickpea variety (PDF). The map will help researchers and breeders the world over to – through molecular breeding methods – deliver to growers higher-yielding more resilient varieties of chickpeas. 

Now that we have the rewards in a nutshell, and we choose to chew the chestnut of challenges later in the story, let’s next decipher the ‘Rajeevs’ part in the title: introducing Rajeev K Varshney, our very own Leader of Comparative and Applied Genomics, who also led and coordinated the transnational collaboration that developed this map.

We had the pleasure of talking to the gently-spoken Indian, a week before the release of the paper, asking him to recount how the project began, and the challenges and success they faced along the way. We’ll soon get to what Rajeev had to say, but first, a rapid rewind for backgrounding before Rajeev tells us the rest of the story…

… we have the ‘borders’ done… a good idea of what the picture is, and where the rest of the pieces will fit.”

Rajeev in the lab.

Reality check from the Genomics Gnome of Good News: two is but the twinkling of an eye…
The sequence map of the genotype CDC Frontier – a Canadian kabuli chickpea variety – took about two years to construct.”

No, the time taken is not the challenge since we’re yet to get to that part. In fact, in the world of genomics , two years is fairly fast, compared to, say, the time taken for sequencing other grain genomes such as maize, rice and wheat.

Rajeev attributes this to the interdisciplinary expertise of his team, most of whom are world leaders in their field, and to the enthusiasm and generosity of all partner institutes who funded the collaboration.

And with that background, on to our chat with Rajeev!

Sandwiches in the Sunshine State, and a search starts for the then unattainable holy grail

Q: Is it correct that this project started over sandwiches under a sunny sky in California?
Funnily enough, yes. We had the preliminary discussion during a lunchtime break at the fifth International Congress on Legume Genetics and Genomics back in July 2010. Doug Cook, from the University of California, Davis, and I, organised the meeting for select attendees to discuss the idea.

With daughter, Nanz. Rajeev in ‘Daddy-mode’, a galaxy away from genomic research.

Many researchers at the time had, or were toying with, sequencing parts of the chickpea genome to discover genes that helped plants tolerate salinity, drought, disease, and so on. The idea of mapping the whole genome, however, was thought to be unachievable given the cost and resources required. What Doug and I proposed to the 10-odd senior researchers that day was that we form an alliance to pool together our knowledge, funds and resources.

When we returned to our home institutes, we all approached our institutes or funding agencies in respective countries, to propose they consider funding the collaborative project. To be honest, this was probably the most challenging task of the project, as it often is with other projects, as they had a hard time recognising the benefits. However, we finally got there, and with the help of more than 20 institutes from North and Central America, Asia, Australia and Europe, we have successfully assembled 74 percent of the genome within two years.

Pieces fall into place for mix-and-match combinations

Now, you may say that 74 percent doesn’t equal the whole genome, but it does provide us with a map and pointers we’d never had before. Imagine doing a jigsaw without a picture to guide you – that’s how hard it was for us at the start. Now at least we have the ‘borders’ done, and we have a good idea of what the picture is, and where the rest of the pieces will fit.

Q:Why is mapping the chickpea genome so important?
Having the genome mapped is going to benefit all chickpea breeders, researchers and growers.

Say a conventional breeder wanted to create a new breed of chickpeas with drought tolerance. They would cross a domesticated, high-yielding variety of chickpeas, with a variety that tolerates dry conditions – most likely, lower-yielding – and then grow the progeny in the field. They wait for these progenies to grow, then visually select the best lines and make crosses with these. They keep doing this process over and over again for six to seven years until they’ve generated a new variety with the desired trait.

Different breed, mould and mode

Molecular breeders do it differently: instead of selecting the lines by visual inspection, they select lines based on their genes. This means they can correctly trace whether the progeny has received the genes which help the plant tolerate drought and only grow, test and cross with these plants, almost halving the time it would take through conventional methods.

With the map, researchers will be able to more rapidly identify genes of interest, and work with breeders to select for plants that display the favourable traits of these genes, whether this be for drought tolerance, pest resistance or for any other trait they are interested in.

Q: Good for researchers and breeders, but how is that going to benefit growers though?
Knowing which plant is more tolerant of drought from the start of the breeding process is going to significantly reduce the time it takes for breeders to develop these types of chickpea cultivars. So, growers will have new breeds of higher-yielding more resilient chickpeas available sooner.

Ethiopian farmer, Temegnush, and her chickpea harvest.

Remember also that chickpeas are a very important crop for smallholders in the resource-poor harsh environments of sub-Saharan Africa, India and Southeast Asia. Not only do they grow it for food and to replenish soil nitrogen, they also export to India, the world’s largest consumer of chickpeas. Most of these farmers would be lucky to harvest one tonne per hectare, so any yield advantage means extra income.

This point is particularly relevant for GCP’s goal, which is to improve the livelihoods of such farmers.

Q: This was one of the largest collaborative projects you’ve coordinated in your relatively short career. What was the most challenging aspect?
Short answer is….many!  With it being a collaborative project, bringing together researchers from all around the world, it was always difficult to coordinate suitable times for Skype and phone meetings.

Personally though, my biggest challenge was trying to coordinate so many esteemed researchers. We all had great ideas and we all thought each of our ideas was the right one. I had to resolve all issues amicably and find a solution to move forward.

Luckily I have surrounded myself over the years with some good colleagues to whom I’ve always been able to turn to discuss any problems. Jean-Marcel Ribaut, who is the Director of GCP, was one particular colleague to whom I often turned to for advice, given his experience with coordinating all of GCP’s collaborative interdisciplinary projects. He also helped source much-needed funds and suggested several useful partnerships, which were vital in carrying out the project.

My boss at ICRISAT, William Dar, the Director General, has always been very supportive, and time and again went out of his way to make sure I had the funds, capacity and sanity to keep the project going! I am deeply indebted to him.

The future

Q: How will the research continue?
Researchers and breeders will be able to customise the genome map to fit their particular purposes. Most will be interested in using it to develop molecular markers, which breeders can use to highlight specific genes of interest for molecular breeding. As I mentioned earlier, this could realistically halve the time it takes to breed new varieties from six to10 years to four to five years.

One outcome of the project, which I’m particularly interested in exploring further, relates to chickpea diversity. When we compared the 90 chickpea genomes, we realised that that diversity in the elite varieties was very low, meaning they all had very similar alleles (form of genes).

This has come about because over the years, breeders and growers have continually chosen only a handful of chickpea varieties to continually breed with. This is because these breeds tend to produce higher yields, something which all growers want.

The drawback of this, however, is that if all the popular breeds are too similar, then they could all be susceptible to a particular disease. If this particular disease were to strike, then chickpeas could be wiped out – globally.

So this map will be a valuable tool to use to enhance genetic diversity in the elite gene pool, thus safeguarding the world’s supply of chickpeas.

 

Links

Paradise left… then regained: A lifelong passion for plants, and plant science

 Asia, Crop breeding, Genetics, Genomics, Researchers, Rice  No Responses »
Jan 232013
 
Print Friendly

Abdelbagi Ismail

 I was forever inquisitive as to how things grew, and questioning when they didn’t grow well. I think it’s what got me interested in plant science.”
– Abdelbagi Ismail, Plant Physiologist and Principal Scientist, International Rice Research Institute.

Today, we talk to Abdel. His riveting voyage in plant science starts on the bountiful banks of the Nile, before we sail on to Asia’s ricelands.  We’ll make a short stopover in USA for cowpeas and drought in between,  then proceed to to our main meal of rice, spiced and seasoned with a strong dash of salt-and-P.

It’s not just about food, but also family: you’ll  get to meet a sister Challenge Programme along the way. Intrigued? We hope so, so please do read on! 

‘A’ for Abdel and agriculture – an early passion for plants
From a tender age, Abdel was fascinated by agriculture.

Growing up on a small family farm backing onto the banks of the Nile in the Northern State of Sudan, he helped his parents in tilling the land, sowing and harvesting.

Abdel reminisces, “It was a relaxing paradise with all types of fruit growing around you year-round. Working and living on a farm, I was forever inquisitive as to how things grew, and questioning when they didn’t grow well. I think it’s what got me interested in plant science.”

Armed with a Bachelor’s and Master’s in Agricultural Sciences (agronomy, crop production, water relations) from the University of Khartoum, Sudan, Abdel moved to the University of California, Riverside, USA, for a PhD on drought tolerance in cowpeas.

“It was the first time I had ever left Africa, and it was a real eye-opener,” Abdel recalls. “It was a fantastic new page in my career too, as I was working with world-class professors and mentors. I chose to work on cowpeas because it is a hardy crop that can be grown in dry conditions which were – and still are – becoming more prevalent in sub-Saharan Africa.” (you can take a sidetrack here, to see our research on cowpeas)

 What interests me is how some societies have survived, and, in some cases, flourished because they invested in improving their plants and crops to adapt and adjust to weather adversities.”

Navigating away from the Nile, and discovering his niche
For this native son of the Nile, this move was a watershed. It marked the start of a dedicated – and still ongoing – career quest to understand how plants can adapt to better tolerate extreme environmental stresses such as higher and lower temperatures, too much or too little water, salinity, and nutrient imbalances.

“Abiotic stresses have had, and continue to have, a major impact on human life, with some societies disappearing altogether because of changes in soils or climate,” says Abdel. “What interests me is how some societies have survived, and, in some cases, flourished because they invested in improving their plants and crops to adapt and adjust to weather adversities.”

From time immemorial, the communities around the Nile where Abdel spent his childhood are a prime example of this flourishing against adversity.

IRRI beckons, and nurtures
In 2000, Abdel accepted a position at the International Rice Research Institute (IRRI) in The Philippines.

Abdel inspects cyclone-damaged rice in Isladi Village, southern Bangladesh.

“I saw it as an opportunity to convert knowledge and scientific discoveries into resources that could help needy farmers,” explains Abdel.

Abdel confesses that when he joined IRRI, his intention was to stay for a short stint and then move on. But as he became more involved in his work, he felt IRRI offered him the best opportunity to build his career, and to contribute to global food-security issues.

“I’ve been here for 12 years now. IRRI really is a great place to grow as a person and a researcher, and to learn how to become a leader.”

Having GCP provide ongoing funding and support for public institutions to conduct a long-term project has been pivotal to the success of the project. It has given us all the security we need to focus on conducting the complex research required…”

Trailblazing for GCP : a much-needed dash of ‘salt-and-P’
In 2004, Abdel proposed a collaborative project between nine different research organisations, across seven countries, to improve salt tolerance and phosphorus uptake efficiency in rice. The work was funded by a sister CGIAR Challenge Programme on Water and Food (CPWF).

This work caught – and held – GCP’s attention, because it sought to overcome a problem that negatively affects the lives of tens of thousands of rice growers around the world. The two resultant GCP-funded IRRI-led projects involved partners from Bangladesh, India, Indonesia, Vietnam and USA’s University of California, Davis. Globally, more than 15 million hectares of ricelands are saline, and more than one-third of all ricelands are phosphorus-deficient, hitting poor communities hardest.

In the nine years since, and together with his colleagues and partners, Abdel has developed the proposal into a productive and coherent suite of interconnected projects: he has managed and overseen most of the progress made during the discovery of the genes associated with salinity tolerance (Saltol) and phosphorus uptake (Pup1), and their insertion into well-known rice varieties that farmers in Bangladesh, Indonesia and The Philippines know and trust.

It’s all about rice: salt tolerance (Saltol) ‘meets’ phosphorus uptake (Pup1) in Bangladesh. Abdel is on the extreme right. Next to him is Sigrid Heuer, Principal Investigator of the ‘Pup1’ work.

Keeping the faith, and going where no rice has gone before…
A long-term horizon helps, since, just like art, science cannot be hurried: “Having GCP provide ongoing funding and support for public institutions to conduct a long-term project has been pivotal to the success of the project,” Abdel emphasises.

“It has given us all the security we need to focus on conducting the complex research required to advance our knowledge about these genes, then breed and develop popular varieties containing then. In some cases, we have developed lines with doubled yields, and grown rice in areas where it has never been grown before because the land was too saline.”

For Abdel, such achievements are heartening as they provide farmers with greater food and income security, which in turn improves their and their community’s livelihoods.

“It brings a smile to my face whenever I think about how our work helps to produce higher-yielding crops for poverty-stricken countries whose farmers often can only afford to grow one crop per year,” says Abdel sincerely.

Abdel continues to build upon, and has even employed, partners he has met through the GCP project…”We want to improve their capacity to take up new breeding techniques, such as the use of molecular markers, which can reduce the time it takes to breed new varieties from six to 10 years to two to three years…”

Continually building on the best
So what’s in store for the future?

Having discovered the Saltol gene and developed experimental lines, his team is now training breeders from country breeding programmes on how they can successfully breed for salt tolerance and tolerance of other abiotic stresses using their own popular varieties, thereby fortifying popular varieties with these much-needed tolerance traits.

“We want to improve their capacity to take up new breeding techniques, such as the use of molecular markers, which can reduce the time it takes to breed new varieties from six to 10 years to two to three years,” reveals Abdel. “This will allow them to breed for crops quicker, in response to ever-changing and extreme climate conditions.”

As for his other projects with IRRI, Abdel continues to build upon, and has even employed, partners he has met through the GCP project to help him with his Stress tolerant rice for Africa and South Asia (STRASA) project.

GCP helped IRRI attract support from other funders…”

Going further, faster, together… five and counting, still learning, and the future looks bright
STRASA is almost five years old and has another five years left to run.

“GCP helped IRRI to attract additional support from other funders, such as the Bill & Melinda Gates Foundation, to start STRASA, which seeks to support the development and distribution of stress-tolerant varieties in Africa and South Asia,” Abdel explains.

Abdel’s parting words? “I’m still committed to understand how plants can be manipulated to adapt to, and better tolerate, extreme environmental stresses, which seems  more feasible today than it has ever been before.”

Links

Science in her blood – Born into botany, bloomed into biochemistry and molecular biology, and now in applied science

 Asia, Capacity building, Genetics, Genomics, Researchers, Rice, Women in science  1 Response »
Dec 212012
 
Print Friendly

I’ve always enjoyed my job, particularly teaching students and young researchers, but this project has made me think about how I can do more practical science.” – Zeba Seraj, Biochemistry and Molecular Biology Professor, University of Dhaka, Bangladesh

Zeba Seraj

Growing up with a botanist as a father, Zeba Seraj was nurtured to look at plants in a scientific light. But at one stage in her life, she took a different fork on the road: she was more interested in rat livers and cow eyes, before becoming a ‘late bloomer’ in applied science and molecular plant breeding, which is her current niche.

Taking that fork: rats seduced, cows made eyes, but both lost…
Having completed her Undergraduate and Master’s in Biochemistry at the University of Dhaka, Bangladesh, during the 70s and 80s, she moved to Scotland for a PhD at the University of Glasgow. After being persuaded that molecular biology and recombinant DNA technology were not likely to be too different in animals and plants, she focused on the separation of nuclear proteins involved in post-transcriptional processing in the rat liver system.

“I then went on to work as a postdoc at the University of Liverpool, UK, for 18 months, where I worked on a bovine retina cDNA [complementary DNA] library,” Zeba recalls. “I was exposed to a number of recombinant DNA techniques and was pleasantly surprised to find DNA much easier to work with compared to proteins! I enjoyed it, but when I returned to the Bangladesh, there was no work in that field, so I turned to plants.”

The rise of rice, propelled by ‘Petrra’ project and petri dish
Back at her old University, one of Zeba’s first projects was working on salt tolerance in rice which allowed her to set up plant tissue culture facilities and establish a modest molecular biology laboratory. Zeba thereafter worked with the International Rice Research Institute (IRRI) and the Bangladesh Rice Research Institute (BRRI) on the Petrra project (poverty elimination through rice research assistance). The project was funded by the Department for International Development, UK. Meanwhile, she also spent a couple of months in the laboratory of the illustrious Dr John Bennett at IRRI, learning the latest technology in DNA markers and polymerase chain reaction (PCR) technology. This inital work would, in a way, lead her to GCP.

Meeting GCP, and banking on potential
Zeba joined the GCP community in 2005, working on the rice Saltol (salt tolerance) project. She was a focal collaborator in Bangladesh for this IRRI-led project that aimed to revitalise marginal ricelands by discovering and breeding into popular rice varieties ‘survival’ genes to enable rice to not only survive but also thrive on saline or phosphorus-poor soils.

“We were introduced to the project through the Principal Investigator, Abdel Ismail,” recalls Zeba. “Our lab was not very modern, but we did have all the facilities to do marker work, as well as a firm grasp on the theory, so IRRI and GCP must have seen potential in us.”

 …doing the research helped me understand the practical application better… It was a real eye-opener.”

Transiting from theory to practice
After 15 years of working as an associate professor and professor at the University of Dhaka (DU), mainly nurturing young biochemists, Zeba was re-energised by the thought of working on such a practical project that would have a direct impact on her country’s food security, and on its farmers’ livelihoods.

In the background, genotyping in progress at the Department of Biochemistry and Molecular Biology, University of Dhaka. In thef oreground, student– supervisor consultations. Pictured (left to right) are: Zeba I Seraj, Roman, Adnan, Sarwar, Debashis,Rabin, Dost, Mishu, Shamim and Rejbana.

Nearly one million hectares along the Bangladesh coast are affected by varying degrees of salinity which has severely limited the introduction of modern high-yielding rice varieties, as few of these are saline-tolerant. Given Bangladesh’s high population, farmers need as bountiful yields as possible, and minimum risk of failure.

“After reading and teaching theory for so long, it was really exciting to actually put it into practice and work towards a practical outcome,” says Zeba.

“Actually doing the research helped me understand the practical application better too. It was a real eye-opener.”

 Using molecular markers allowed us to at least halve the time it would take to release stress-tolerant rice.” 

Gaining time: the ‘miracles’ and ‘magic’ of molecular makers
Zeba’s lab was responsible for the molecular evaluation and selection of rice lines bred by BRRI for insertion of the genomic region containing Saltol (discovered to confer salt toleranceby the previous IRRI-led GCP-funded project).

Md Sazzadur Rahman of BRRI assesses progress on a salt-tolerant rice variety in the field.

“We collected leaf samples from the BRRI-bred lines which were a combination of popular rice landraces and a Saltol donor.” explains Zeba ‘Landraces’ is ‘breeder-speak’ for varieties grown by, and popular with, farmers, but not necessarily improved by selective scientific breeding. Zeba continues, “We then used molecular markers which would indicate the presence of the Saltol genomic region.”

“The information we gathered guided the breeders at BRRI to select rice plants with the Saltol region. Selected plants were then further analysed with markers, to maximise the presence of popular alleles,” she adds. Allele is one of two, or more, forms of a gene – the alternative form of a gene responsible for a trait producing different effects.

“Using molecular markers allowed us to at least halve the time it would take to release stress-tolerant rice,” Zeba reveals.

 I will be the happiest person on earth the day they release the new lines, knowing that I’d helped to make a difference.”

Seven years on, what next?
Zeba is grateful that she and her lab were active partners in GCP projects for seven consecutive years: first in the IRRI-led project in 2005 to 2009, then in a follow-up supplementary capacity-building DU-led project from 2010 to 2011, for which Zeba was the Principal Investigator.

Nirmal Sharma and Jamal emasculate the first backcross population of a crosscombination for a second backcross at BRRI

“I don’t think we could have done the work without the various GCP networks. Several times in the project we would lag behind and they’d offer us support to get us back on track,” says Zeba. “They also instilled in us the importance of proper data management, and we have now implemented their system to collect, store and report data for all of our projects. We also now have all the equipment and processes in place, meaning that we’re now able to accommodate similar projects, now and into the future.”

Personally Zeba feels the project has given her a new direction in her career that she’s keen to further explore. “I’ve always enjoyed my job, particularly teaching students and young researchers, but this project has made me think about how I can do more practical science,” confides Zeba.

As for the Saltol project, she is keeping a close eye on the application waiting for the news of high-yield salt-tolerant lines becoming accessible to all Bangladeshi rice farmers.

“I will be the happiest person on earth the day they release the new lines, knowing that I’d helped to make a difference.”

Links

  • More on Zeba Seraj on page 40 here
  • The road behind us: read on the early days (2005/2006) of the rice salt-tolerance work:
    • on pages 36–39 here
    • on pages 28–30 here
    • on page 6 here
  • Profile: Abdel Ismail, Principal Investigator of the salt tolerance project

 

Born in Africa: A lifelong cross-continental love affair with science

 Africa, Asia, Crop breeding, Genetics, Genomics, Researchers, Rice, Women in science  2 Responses »
Nov 302012
 
Print Friendly
Photo: IRRI

Sigrid Heuer

Meet Sigrid Heuer (pictured), a Molecular Biologist and Senior Scientist at the International Rice Research Institute (IRRI). Her lively and riveting story will take us from Africa through her native Europe and on to Asia, and finally Down Under to Australia.

Origins – the African chapter
Africa holds a special and soft spot in Sigrid’s love affair with science: it was while on this continent that she realised her calling in life as a scientist – linking people doing pure research on plant genes to help plants survive and even thrive in harsh environments, with people who want to apply that knowledge to breed crops that can change the lives of millions of farmers who constantly compromise with nature to make a living.

Photo: IRRI

Fieldwork: Sigrid at a field trial for rice phosphorus uptake.

“Working as a postdoc at the Africa Rice Center in Senegal was a real life-changing experience,” Sigrid recollects with great fondness. “It’s where I found my niche, using my background in theoretical science and applying it to developing crops that could overcome abiotic stresses, and in doing so, make a real impact on people’s lives.”

Rowing further down the river: from upstream to downstream science
Sigrid was born and raised in Hamburg, Germany. She remembers wanting to be a psychologist and didn’t consider science until a few years after finishing school. After completing a biology undergraduate at Phillips University, Marburg, Germany, she returned to her home city of Hamburg to complete a Masters and PhD in plant physiology and molecular biology respectively.

“Back then, I was really involved in upstream science, fascinated in the fine details without much consideration of how such research could benefit society,” says Sigrid. “I still enjoy this form of science and really do value its purpose, but putting it into practice and focusing on the impact that it can have is what really motivates me now.”

Moving to IRRI, and meeting Pup1 and GCP
After three years in Senegal, Sigrid moved to the Philippines to join IRRI in 2003, first as a consultant then as a part-time scientist. In these early years, she was working on several projects, one of which was the GCP-funded Pup1 (rice phosphorus uptake) project.

“The project sought to identify the genes associated with phosphorus uptake in rice lines that could tolerate phosphorus-deficient soils,” says Sigrid. “It was an interesting project in which I was able to use my background in molecular biology. Little by little, I got more and more involved in the Pup1 project and after a year I was asked by Matthias Wissuwa, who was leading the project at the time, if I wanted to take it over. It was a great opportunity which I jumped at, not knowing then how challenging it would prove.”

Pup1 was the first major project I had managed. It was a playground of sorts that allowed me to learn what I needed to know about managing a project – writing proposals and reports, managing budgets and people’s time, and everything else that comes with leading a team.

The ‘root’ and  ‘command post’ where it all happens: Sigrid in the office. For the benefit of our readers, we would have credited the young artist whose colourful work graces the background below the bookshelf, but we were too polite to pry and prise out the young talent’s name, having hogged too much of Sigrid’s time already!

Learning to lead – both work and play

Over the last seven years, Sigrid has been a Principal Investigator and joint leader of the project, which has given her latitude to mature professionally, and not just in science alone. “It’s been tough but personally fulfilling,” Sigrid says, with just a touch of exhaustion.

“Pup1 was the first major project I had managed. It was a playground of sorts that allowed me to learn what I needed to know about managing a project – writing proposals and reports, managing budgets and people’s time, and everything else that comes with leading a team. I was really lucky to have Matthias’ help as well as the other experienced collaborators and networks. However, the main factor that made my job a lot less stressful, was the benefit of long-term funding and support from GCP. GCP was always there, supporting us and giving us confidence even when we weren’t sure we were going to succeed.”

Persistence pays: tangible products, plus publication in Nature
In August 2012, Sigrid and her team achieved what they had set out to do seven years ago, through what Sigrid puts down to sheer persistence: their discovery of the Pup1 gene was recognised by their scientific peers and published in the highly renowned journal,  Nature.

Sigrid (3rd left) at the lab with other colleagues in the phosphorus uptake team.

“Having our paper published is really something special and personally my greatest achievement to date,” says Sigrid, but she is also quick to add that it was a team achievement, and that the achievement was in itself humbling.

“It was a double reward for persisting with the research, and with getting it into Nature. We wanted it in Nature for several reasons. To raise awareness on phosphorus deficiency and phosphorus being a limited resource, especially in poorer countries; and to draw attention to how we do molecular breeding these days, which is a speedier, easier and cost-effective approach to developing crops that have the potential to alleviate such problems.”

Sigrid hopes the article will have a lasting impression on readers, and encourage funders to continue to support projects that have such impact on the lives of end-users.

What next? Technology transfer, transitions and torch smoothly passing on…
With the Pup1 gene now found, IRRI researchers are working with breeders from country-based breeding programmes around the world to help them understand the techniques to breed local varieties of rice that can grow in phosphorus-deficient soils. They are also collaborating with other projects that wish to use the Pup1 project as a case study for phosphorous deficiency tolerance in other crops like maize, sorghum, and wheat (see an example here, that includes partners from Africa and Latin America).

Sigrid sees this next stage as a perfect time to step down from the project: she plans to move to Adelaide, Australia at the end of 2012 to lead a new project that is looking at drought and nitrogen deficiency tolerance in wheat.

“Matthias passed the baton on to me, and now I get to pass the baton on to someone else, so it’s nice. And I’ll be sure to always be around to help them too.”

Links

Sigrid’s presentation at the GCP General Research Meeting 2011

 

 

Of magic beans and giant beanstalks: A legume fairy tale coming true in Ethiopia

 Africa, Beans, Legumes  No Responses »
Nov 292012
 
Print Friendly

By Gillian Summers

The TLI project lets us know about molecular breeding, so it’s exposed us to new developments in science, especially in the application of molecular techniques and plant breeding.”  – Asrat Asfaw Amele, Southern Agricultural Research Institute, Ethiopia

Many a tale about Ethiopia will regale the reader with details of its contrasting landscape, numerous rivers, searing regional temperatures, the multicultural makeup of its society, its world-famous, unbeatable long-distance and high-altitude runners, its rich history and culture; a sweet producer of honey, the home of coffee, and origin of all mankind…

Seeing red… but no blood
…I found a land of incurably hospitable and kind people, proud of their country and culture; infectiously good music, incredibly strong coffee, where they love both bloody raw meat and protein-rich red beans, dubbed ‘bloodless meat’ in this part of the world.

Cool early morning departure

Cool early morning departure

Out & about
My first real taste of Ethiopia was out in the countryside where I visited the work of GCP’s Tropical Legumes I (TLI) project in the field, on a trip to the bean fields at the Southern Agricultural Research Institute’s (SARI) research stations at Areka and Hawassa, which took us on a 600-km round tour, out of the capital Addis Ababa and into the Great Rift Valley beyond.

We set off early that cool morning, and as we headed into the countryside, I glimpsed many a local taking their first breath of morning air as they stepped outside from their decoratively-painted, round, thatched-roof homes, and shook the night’s sleep from their shoulders.

Traditional thatched living rooms

Traditional thatched living rooms

So their day began – already there was smoke coming from the chimneys, and I imagined the lady of the house beginning to prepare for the first coffee ceremony of the day. Coffee is often accompanied by a dish of boiled red beans. Or maybe she was warming the pan for the morning injera – a kind of ‘teff tortilla’: a sour-dough thin pancake made of the local cereal, teff. Injera is an iconic ubiquitous component of Ethiopian cuisine, with which diners take all manner of wat, or stew made from a rich variety of ingredients – from legumes to raw meat, carefully rolling the spongy crepe around the filling twice, making sure no food falls onto the fingers, for dining etiquette strictly dictates against the licking of fingers.

Ensete plantations

Ensete plantations

Living landscape

We pass score upon score of the gently-smoking thatched round huts – the traditional ‘living rooms’ in these parts; most dwellings are accompanied by modest smallholdings, with maybe a grazing goat or two, and many more with plantations of ensete – a banana-like plant, which, in spite of its inedible fruit, has long been a staple in Ethiopia. It is used for its root, which is mashed to make a tasty, stodgy, bread-like food called kocho, used to accompany meals, a denser cousin of the favourite injera. These smallholdings would also be the perfect size for cultivating beans, as they are not an acre-hungry crop, but grow happily on small plots of land, and in some areas are intercropped with ensete to maximise the space.

Dromedaries, drought and beans

Our common legume: the bean, Phaseolus vulgaris L

Our common legume: the bean, Phaseolus vulgaris L

Into this landscape we pass the incongruous addition of a herd or two of camels with their owners…significantly peculiar as these aren’t desert lands, but the edge of the Ethiopian highlands, gradually and graciously giving way to the majestic Great Rift Valley below. I ask my guide about the addition of camel hands to this highland scenery: he explains their strange presence is due to a growing food shortage which has forced these nomadic peoples further afield to find their fare. The appearance of these dromedaries and their human partners brings harshly to mind Ethiopia’s most notorious claim to fame – especially for anyone who recalls the mid-1980s – for whom Ethiopia will always be indelibly synonymous with famine. It also throws the work of GCP, and specifically TLI, sharply into the spotlight, for the over-arching objective of this project is to improve legume productivity in environments considered marginal for agriculture, due to heat and other stresses. Somehow, it seems that more of the world’s environment is becoming ‘stressed’ by the day, though luckily the giant beanstalk of our story is a hardy crop which can be grown on the poor soils and fragmented plots of these challenged lands.

L–R: Asrat Asfaw Amele (SARI), Bodo Raatz (CIAT), Daniel A Demissie

L–R: Asrat Asfaw Amele (SARI), Bodo Raatz (CIAT) and Daniel A Demissie (Areka Research Station) discuss the A–Z of beans at Areka Research Station.

So the legume of choice for this most uncommon road trip is the common bean, Phaseolus vulgaris L, and our Ethiopian bean breeding expert is Asrat Asfaw Amele of the Southern Agricultural Research Institute (SARI), who is the Lead Scientist of the TLI beans component in Ethiopia. Asrat is our friendly guide and fount of knowledge of all things Ethiopian throughout this impassioned passage into the ‘bean valley’, and we are accompanied by Bodo Raatz of the Centro Internacional de Agricultura Tropical (CIAT), recently appointed Principal Investigator of TLI’s bean research. At Areka research station we are joined on our journey by Daniel A Demissie, who, along the way, shares his many insights on beans, diseases such as bean stem maggot (BSM), and on drought . We are chaperoned throughout by our courageous driver, Mr Abebe, who at times resembles a pilot as we seem to fly over the bumpy terrain in the plucky pick-up that is our steed for the day.

Courageous steeds

Courageous steeds: our driver, Mr Abebe (foreground and far right) and the intrepid pickup are joined by workers from Areka station

Impact

Asrat Afaw Amele

Asrat Afaw Amele

Against the scenic backdrop of the Ethiopian landscape racing by, with background music courtesy of Teddy Afro (whose politically charged songs, sweet voice and infectious rhythm have made him nothing short of a legend in his homeland), I take advantage of this long and winding road trip to interview Asrat, where his answers echo the whirlwind tour rushing by outside – from a description of the landscape he knows so well, and toils in every day – to the impact that this project has had on national scientists, the impacts on farmers’ lives, as well as impacts that are likely to come in the not-too-distant future.

We consider farmers our partners. We try to understand what farmers are looking for, what they like, and we try to include their interests in our breeding materials so that the breeding materials released by our institution start to get wider adoption.” – Asrat Asfaw Amele (pictured).

The rich Ethiopian landscape

The rich Ethiopian landscape

Revolution, alliances & partnerships

Ethiopia’s rich history, as varied as its topographical landscape, has known its fair share of extreme rulers. Now it seems the new ‘regime’ calling the shots is climate change, whose ravaging effects are seen worldwide, and no less in the bean fields of Ethiopia. Asrat even pinpoints climate change as the greatest challenge for the next generation of bean researchers, saying, “The farmers’ growing environment may be modified or a new environment may be created. That could also be a challenge – a new pest population or new disease may come; so the challenge in the future may be to breed or develop varieties which adapt to the changing environment.”

Beans line up

Beans line up at Awassa Research Station

The revolutionaries needed to overthrow this ‘tyrant’, it seems, are those of the ‘triple alliance’ partnership, comprising: Ethiopia’s national scientists, researchers from the international science community including CGIAR Centres, and farmers. Firstly, with this approach, the science sector can understand farmers’ needs, which also has a reciprocal effect, as Asrat explains, “We consider farmers our partners. We try to understand what farmers are looking for, what they like, and we try to include their interests in our breeding materials so that the breeding materials released by our institution start are widely adopted.” Secondly, national and international science systems come together to work for a common goal – in Asrat’s words: “Now we’ve got the knowledge and we can speak a common language with people from advanced laboratories. It’s also brought us closer to international institutes like CIAT and other CG Centres – we work together, so they understand our system better and we understand how they function.” He adds, “We are getting technical backstopping from CGIAR Centres, so as a national partner we are doing work, and they are supplying germplasm. That’s the partnership that will continue in the future.”

The weapon used by this ‘revolutionary army’ is GCP’s double-barrelled approach which combines both traditional and molecular breeding practices and is proving to be effective in developing new, more productive bean varieties to combat drought and disease. Specifically of the TLI project, Asrat says, “It lets us know about molecular breeding, so it’s exposed us to new developments in science, especially in the application of molecular techniques and plant breeding.”

Daniel A Demissie

Daniel A Demissie contemplates looming rain clouds across the parched terrain

The ‘monster’, climate change, rears its ugly head only to be shot down expertly by Asrat and the mighty beans as he reveals, “A lot of farmers are growing our varieties, and, because of changing weather or instability, many people are starting to grow beans; beans are now becoming a major crop, especially in our mandate area.”

Capacity building …
At this stage, the major impact of the TLI beans component in Ethiopia has been on capacity building – both in terms of human resources and physical infrastructure, as Asrat illustrates, “In our breeding programme, capacity building has been an important aspect: scientists in our national system are being exposed to new technology, information, and training; we also have a full irrigation system in about 10 hectares of land, which will revolutionise our work.”

Photo: N Palmer/CIAT

Magical bean diversity

… and on to farmers
By building on lessons learnt throughout this project, current impacts for the national science system will be translated into ‘real impacts’ in farmers’ fields in the near future. Indeed, Asrat hopes his future work will involve “getting the material into the hands of farmers, to see some impact or change, and to modernise and speed up breeding processes using markers developed by this project.”

Beanstalks. Photo: N Palmer/CIAT

Beanstalks: giant potential in Ethiopia

So the ‘magic beans’ of our story tell of a rich brew brimming with such potent ingredients as molecular breeding, capacity building, partnerships spanning continents and research systems, true teamwork with the farmers in the fields, and the drive to conquer the new challenge of a changing climate.

The impacts from the TLI project are the pot of gold at this rainbow’s end, showing that fairy tales do come true, where ‘magic beans’ put down roots and grow real shoots, and are not just ‘castles in the air’.

Links

Breeding beans to better battle drought and disease in Ethiopia

 Africa, Beans, Crop breeding, Genetics, Genomics, Legumes  No Responses »
Nov 132012
 
Print Friendly

Bean breeding in his bones: Asrat A Amele

For our bean team, we already see the benefits of being in the Tropical Legumes I  project. We now understand molecular breeding, and we are able to apply molecular breeding techniques.” – Asrat A Amele (pictured)

Asrat is a bean breeder at Ethiopia’s South Agricultural Research Institute (SARI) at the Awassa Research Centre.

Besides breeding beans that will better battle drought, Asrat’s team combines drought tolerance with resistance to the bean stem maggot (BSM) – a pest that afflicts all bean-growing zones in Ethiopia.

Connections, continuity and capacity building
The Tropical Legumes I (TLI) was not an entirely new connection, as Asrat’s involvement with GCP predates this particular project. He started off as a GCP-funded fellow in 2007, investigating bean genetics for drought tolerance. The fellowship would also seem him do a stint in Colombia at the International Center for Tropical Agriculture  (CIAT, by its Spanish acronym). His work at the time on root phenotyping and quantitative trait loci (QTL) analysis has since been published.

At that time, Asrat remarked:

The GCP fellowships programme is great for a person like me, working in a developing-country research institute. I can say it potentially provides researchers with up-to-date scientific knowledge in areas of specialisation. It provides better contact with scientists in other parts of the world and opens a wider window to think on problems and deliver better research products.”

Thorugh GCP, Asrat also attended a molecular breeding course at Wageningen University and Research Centre in The Netherlands. Wageningen is a GCP Consortium member.

The ravages wrought by bean stem maggot.

Having passed through that door of opportunity and looking back now, what does Asrat say? “Through TLI, we were able to access new parental sources of germplasm recommended for release and use for breeding. For instance, we’ve received more than 200 lines from CIAT, from which 10 have been selected to be used as parents. We plan to do crosses with these parents to develop a marker-assisted recurrent selection [MARS] population, based on the problems plaguing beans in Africa.”

And it’s not all about material but also matters cerebral (and matters manual, as we shall see further on): “From the science meetings we attend, we’ve also gained valuable new contacts and acquired new knowledge.” Asrat reveals.

Two…and two

Fitsum Alemayehu

Daniel Ambachew

The next step is to validate the workability of MARS, and SARI has a GCP-funded PhD student, Fistum Alemayehu (pictured right), registered at the South Africa’s Free State University and conducting his phenotyping in Ethiopia, alongside other well-trained staff that SARI now has. Fistum is working on marker-assisted recurrent selection for drought tolerance in beans, while Daniel Ambachew (pictured left), another GCP-funded MSc student enrolled at Haramaya University, Ethiopia, is evaluating recombinant inbred line populations and varieties for combined dual tolerance of drought and bean stem maggot.

Both students are using molecular breeding: “For this work, we’ll be using SNP* markers. It is probably the first use of bean SNPs in sub-Saharan Africa. We will now do QTL analysis with the bean population we have from CIAT,” reveals Asrat.

* SNP: (pronounced ‘snips’) is a technical term, and the abbreviation is derived from ‘single nucleotide polymorphism’ – an advanced molecular-marker system widely used in genetic science. You can read more about SNPs in this press release.

Of humans and machines

A training session on maintaining farm machinery.

Moving on to matters manual and mechanical, besides enhanced human resources, SARI has benefited from infrastructure support as part of GCP’s comprehensive capacity-building package: the Institute now has an irrigation system to enable them conduct drought trials, and SARI technicians from more than 20 different SARI stations have been trained in proper use and routine maintenance of farm machinery. SARI also received two automatic weather stations from GCP for high-precision climatic data capture, with automated data loading and sharing with other partners in the network.

Through this project, SARI is now well tuned into the international arena of bean research and development, and profiting in new ways from this exposure to growing international connections.

Water drilling to install irrigation equipment at SARI.

Institutional revolution and rebirth
The engagement with GCP has revolutionised bean breeding at SARI and institutionalised marker-assisted selection. As a result, SARI will soon have a small molecular breeding laboratory funded by another agency. This lab will support one more PhD student and an additional MSc student, both registered in Ethiopian universities and working on marker-assisted selection for beans.

Thus, in this southern corner of Ethiopia, bean breeders conversant in molecular methods will continue to be ‘born’, better-prepared and well-equipped to meet the challenges facing bean breeding today.

 

 

 

Asrat on video

Links

SLIDES: Phenotyping common beans for tolerance of drought and bean stem maggots in Ethiopia

 

Beans: Sidestepping variety… to create varieties to combat drought, disease and pests

 Africa, Beans, Crop breeding, Genetics, Genomics, Legumes  No Responses »
Oct 302012
 
Print Friendly

BREAK-TIME AND BRAKE-TIME from beans for a bit: Steve Beebe takes a pause to strike a pose in a bean field.

“These [molecular breeding] techniques, combined with conventional methods, shorten the time it takes to breed improved varieties  that simultaneoulsy combine several traits.

And this means that we also get them out to farmers more quickly compared to phenotypic selection alone.”
– Steve Beebe

THE NEAR-PERFECT FOOD: Common beans (Phaseolus vulgaris L) comprise the world’s most important food legume, feeding about 200 million people in sub-Saharan Africa alone. Their nutritional value is so high, they have been termed ‘a near-perfect food’. They are also easy to grow, adapting readily to different cropping systems and maturing quickly.

That said, this otherwise versatile, adaptable and dapper dicotyledon does have some inherent drawbacks and ailments that crop science seeks to cure….

Rains are rapidly retreating, and drought doggedly advancing
Despite the crop’s widespread cultivation in Africa, “yields are low, stagnating at between 20 and 30 percent of their potential,” remarks Steve Beebe, GCP’s Product Delivery Coordinator for beans, and a researcher at the International Center for Tropical Agriculture (CIAT, by its Spanish acronym).

“The main problem is drought, brought about by climate change,” he says. “And it’s spreading – it already affects 70 percent of Africa’s major bean-producing regions.”  Drought decimates bean harvests in most of Eastern Africa, but is particularly severe in the mid-altitudes of Ethiopia, Kenya, Tanzania, Malawi and Zimbabwe, as well as in southern Africa as a whole.

A myriad of forms and hues: bean diversity eloquently speaks for itself in this riot of colours.

Drought, doubt and duality − Diversity a double-edged sword
“Common beans can tolerate drought to some extent, using various mechanisms that differ from variety to variety,” explains Steve. But breeding for drought resistance is complicated by the thousands of bean varieties that are available. They differ considerably according to growth habit, seed colour, shape, size and cooking qualities, and cultivation characteristics.

“A variety might be fantastic in resisting drought,” says Steve, ‘but if its plant type demands extra work, the farmers won’t grow it,” he explains. “Likewise, if consumers don’t like the seed colour, or the beans take too long to cook, then they won’t buy.”

Molecular breeding deals a hand, waves a wand, and weaves a band
This is where molecular breeding techniques come in handy, deftly dealing with the complexities of breeding drought-resistant beans that also meet farmer and consumer preferences. No guesswork about it: molecular breeding rapidly and precisely gets to the heart of the matter, and helps weave all these different ‘strands’ together.

The bean research team has developed ‘genetic stocks’, or strains of beans that are crossed with the varieties favoured by farmers and consumers. The ‘crosses’ are made so that the gene or genes with the desired trait are incorporated into the preferred varieties.

The resulting new varieties are then evaluated for their performance in different environments throughout eastern and southern Africa, with particular focus on Ethiopia, Kenya, Malawi and Zimbabwe which are the target countries of the Tropical Legumes I (TLI) project.

Propping up the plant protein: a veritable tapestry of terraces of climbing beans.

GCP supported this foundation work to develop these molecular markers. This type of breeding – known in breeder parlance as marker-assisted selection (MAS) – was also successfully used to combine and aggregate resistance to drought; to pests such as bean stem maggot (BSM); and to diseases such as bean common mosaic necrosis potyvirus (BCNMV) and to bruchid or common bacterial blight (CBB). The resulting ‘combinations’ laden with all this good stuff were then bred into commercial-type bean lines.

“These techniques, combined with conventional methods, shorten the time it takes to breed improved varieties that simultaneoulsy combine several traits,” comments Steve. “This means that we also get them out to farmers more quickly compared to phenotypic selection alone.”

Informed by history and reality
Breeding new useful varieties is greatly aided by first understanding the crop’s genetic diversity, and by always staying connected with the reality on the ground: earlier foundation work facilitated by GCP surfaced the diversity in the bean varieties that farmers grow, and how that diversity could then be broadened with genes to resist drought, pests and disease.

What next?
Over the remaining two years of Phase II of the Tropical Legumes I (TLI) project, the bean team will use the genetic tools and breeding populations to incorporate drought tolerance into farmer- and market-preferred varieties. “Hence, productivity levels on smallholder farms are expected to increase significantly,” says Steve.

Partnerships
The work on beans is led by CIAT, working in partnership with Ethiopia’s South Agricultural Research Institute (SARI),  the Kenya Agricultural Research Institute (KARI),  Malawi’s Department of Agricultural Research and Technical Services (DARTS) and  Zimbabwe’s Crop Breeding Institute (CBI) of the Department of Research and Specialist Services (DR&SS).

Other close collaborators include the eastern, central and southern Africa regional bean research networks (ECABREN and SABRN, their acronyms) which are components of the Pan-African Bean Research Alliance (PABRA). Cornell University (USA) is also involved.

VIDEO: Steve talks about what has been achieved so far in bean research, and what remains to be done

Links

 

Banana genetics: (not-so-)Easy as ♫ABC, 123♫

 Bananas, Genetics, Genomics  No Responses »
Sep 202012
 
Print Friendly

Getting to the core of a world-favourite dessert by unravelling banana’s origin and genealogy

GCP has enabled us to lay a credible foundation, which gave us a leg-up in the intense competition that typifies the genome sequencing arena” – Angélique D’Hont, CIRAD researcher

‘A’ is also for Angélique, as you will see once you read on…

An ‘A’ to our banana team for ushering in a new era in banana genetics. But let soup precede dessert, and don’t let this worry you: stay with us because we’re still very much on the topic and focused on bananas, which offer the whole range from soup and starters, to main course and dessert, plus everything else in between, being central for the food security of more than 400 million people in the tropics: around a third each is produced in Africa, Asia-Pacific and Latin America, and the Caribbean. About 87  percent of all the bananas produced worldwide are grown by small-scale farmers.

Moving back then to soup for starters, we’re serving up our own unique blend of alphanumeric banana ‘soup’, spiced with ABCs, a pinch of 123s, plus a dash of alpha and omega. Curious about the ABCs? Look no further:‘C’ for getting to the core of ‘B’ for bananas, and an ‘A’ score for our ace genomics team that did it.

Read how GCP seeded … and succeeded, in helping open a new era in banana genetics. An achievement by itself, and an important milestone on the road to unlocking genetic diversity for the resource-poor, which is GCP’s raison d’être.

So get your travelling gear please, for time travel with a ‘midspace checkpoint’ in Malaysia.

We start in 2004, when GCP commissioned a survey of diversity with microsatellites (or SSRs, simple sequence repeats) for all mandate food crops in the CGIAR crop research Centres. The objective of that study was to make new genetic diversity from genebank accessions available to breeders.

The endpoint is opening new research avenues to incorporate genes for disease resistance, with the added bonus of an article published in Nature online on July 11 2012, entitled The banana (Musa acuminata) genome and the evolution of monocotyledonous plants.

It may not be quite as easy as the ABC and 123 that The Jacksons promise in song, but we promise you that the science is just as exciting, with practical implications for breeding hardy disease-resistant bananas. Onwards then to the first leg of this three-step journey!

(Prefer a shorter version of this story in pictures? We’ve got it! Choose your medium between Flickr and Facebook)

1) Let’s go Greek: the alpha and omega of it

Rewinding to the beginning

The proof of the pudding is in the eating: we imagine that Jean Christophe Glaszmann just has to be saying “Yummy!” as he samples this banana.

Start point, 2004: “At that time, several research groups had developed SSR markers for bananas, but there was no coordination and only sketchy germplasm studies,” recalls Jean Christophe Glaszmann (pictured), then the leader of what was GCP’s Subprogramme 1 (SP1) on Genetic Diversity on a joint appointment with CIRAD. He stepped down as SP1 Leader in March 2010, and is currently the Director of a multi-institutional research unit Genetic improvement and adaptation of Mediterranean and tropical plants (AGAP, by its French acronym) at France’s Centre de ccoopération internationale en recherche agronomique pour le développement (CIRAD) in Montpellier.

Jean Christophe continues, “The reference studies had been conducted with RFLP* markers, a very useful tool but far too cumbersome for undertaking large surveys. We mobilised Bioversity International, CIRAD and the International Institute of Tropical Agriculture for the project. The process took time, but delivered critical products.” [*RFLP stands for restriction fragmented length polymorphism]

Fastforward to 2012, and gets just a little geeky…

Eight years down the road in 2012, the list of achievements is impressive, as evidenced by a suite of published papers which provide the details of the analysis of SSR diversity and describe how the data enabled the researchers to unravel the origin and genealogy of the most important dessert bananas. The origin of the predominant variety – Cavendish – suggested by the markers, involves two rounds of spontaneous hybridisation between three markedly differentiated subspecies. This scheme has been marvellously corroborated by linguistic patterns found in banana variety names as revealed in a paper published in 2011 in the proceedings of USA’s National Academy of Sciences.

But what else happened in between the start- and end-point? We now get to the really ‘sweet’ part of this bonanza for banana breeding!

It is now possible to conduct research to identify and incorporate genes for disease resistance within fertile populations that are close to the early progenitors, and then inter-cross them to re-establish sterility and obtain vigorous, disease-resistant and seedless progenies.

 2) Of bits, bananas, breeding and breadcrumbs

Threading all these bits together for breeding better bananas is akin to following a trail of breadcrumbs, in which GCP played an important facilitating role: where in the germplasm to undertake genetic recombination is one key; and then, how to expedite incorporation of disease resistance and how to control sterility – so as to first suppress it, then re-establish it – is another set of keys that are necessary for proficient breeding.

Hei Leung in the lab at IRRI.

In 2005, Hei Leung (pictured), then Leader of GCP’s Subprogramme 2 on Comparative Genomics (until June 2007) on a dual appointment with the International Rice Research Institute (IRRI), recognised that with GCP’s main focus being drought tolerance in crops, Musa (the banana and plantain botanical genus) was somewhat on the fringe. However, it was still important that GCP support the emergence of banana genomics.

Hei is currently Programme Leader of Genetic Diversity and Gene Discovery at IRRI. He remembers, “We had a highly motivated group of researchers willing to devote their efforts to Musa. Nicolas Roux at Bioversity was a passionate advocate for the partnership. The GCP community could offer a framework for novel interactions among banana-related actors and players working on other crops, such as rice. The team led by Takuji Sasaki of Japan’s National Institute of Agrobiological Science, which had vast experience in rice genome sequencing, added the scientific power. So, living up to its name as a Challenge Programme, GCP decided to take the gamble on banana genomics and help it fly.”

Angélique D’Hont, CIRAD researcher and lead author of the article published in ‘Nature’.

Through several projects, GCP helped consolidate Musa genomic resources, contributed to the establishment of medium-throughput DArT markers as well as the construction of the first saturated genetic map. Additional contributions included the first round of sequencing of large chromosome segments (BAC clones) and its comparison with the rice sequence and a detailed analysis of resistance gene analogues. All these findings have now been published in peer-reviewed journals. And while publication takes time, it still remains a high-premium benchmark for quality and validation of results, and for efficient sharing of information. It reinforces the value of collaboration, builds capacity and gives visibility to all partners, thereby providing potential new avenues for funding.

Such was the case with bananas: using a collaborative partnership framework established with the Global Musa Genomics Consortium, animated by Nicolas Roux and now chaired by Chris Town, the community developed a case for sequencing the genome. With the mentorship of Francis Quétier, contacts were made with various major players in genomics, which in the end formalised a project between France’s CIRAD and CEA–Genoscope, funded by the Agence Nationale de la Recherche and led by Angélique D’Hont (pictured) and Patrick Wincker.

GCP contributed DArT analysis for anchoring the sequence to the genetic map. But, as stressed by Angélique, CIRAD researcher and lead author of the Nature paper: “Above all, GCP has enabled us to lay a credible foundation, which gave us a leg-up in the intense competition that typifies the genome sequencing arena. We were delighted that France rolled the dice in our favour by funding this work.”

3) Musa musings on the road to and from Malaysia checkpoint

Three years down the road, the team published a description of the genome of a wild banana from Malaysia.

Jean Christophe communes with a Musa plant, perhaps musing “What’s your family history and when will you be fully grown?”

Let’s drill down to some technical facts and figures here: the Musa genome has some 520 million nucleotides distributed across 11 chromosomes, revealing traces of past duplications and bearing some 36,000 genes. While most genes derived from duplication tend to lose their function, some develop novel functions that are essential for evolution; bananas seem to have an outstanding range of transcription factors that could be involved in fruit maturity.

And while the road ahead remains long, we now have a good understanding of banana’s genetic diversity, we have genomic templates for functional studies (a whole-gene repertoire) as well as for structural studies (the chromosome arrangement in one subspecies) aimed at unraveling the genomic translocations that could control sterility in the species complex.

It is now possible to conduct research to identify and incorporate genes for disease resistance within fertile populations that are close to the early progenitors, and then inter-cross them to re-establish sterility and obtain vigorous, disease-resistant and seedless progenies.

This is undoubtedly an inspiring challenge towards unlocking the genetic diversity in this crop, which is central to food security for more than 400 million people in the tropics.

Links

 

Breeding ‘sukses’ in Indonesia’s rice

 Asia, Crop breeding, Genetics, Genomics, Researchers, Rice  No Responses »
Sep 072012
 
Print Friendly

Joko infront of his office at ICABIOGRAD’s Molecular Biology Division.

Indonesian upland rice growers can expect to receive improved varieties that thrive in phosphorus-poor soils within a few years, thanks to the hard work of their national breeding programmes.

Joko Prasetiyono is a proud Indonesian researcher who loves rice.

“I don’t know why. I just love researching ways to improve it so it grows and yields better. I also I love to eat it,” says Joko with a laugh.

Having worked as a molecular breeder, concentrating solely on rice for 17 years at the Indonesian Center for Agricultural Biotechnology and Genetic Resources Research and Development (ICABIOGRAD), one would expect a different reaction. But Joko says he’s as interested in the little white grain as much as when he started as an undergraduate with ICABIOGRAD.

And why wouldn’t he be when he and his team are contributing to research that has just been published in Nature and is set to reduce fertiliser application and improve rice yields in Indonesia and the world over by 20 percent!

Improving Indonesian varieties, no genetic modification

Farmers often use phosphate fertilisers to aid in growing rice in these areas, but this option is often too expensive for Indonesian upland growers.

The project has found plants that have a Pup1 locus (a collection of genes), with the specific gene PSTOL1, are able to tolerate phosphorus-deficient conditions and produce better yields than those not suited for the conditions. An Indian rice variety, Kasalath, was one such.

“We are breeding rice varieties that we know have a Pup1 locus and subsequent PSTOL1 gene in them with Indonesian varieties that are suited to Indonesia’s growing systems,” explains Joko.   

Partnering with the International Rice Research Institute (IRRI), ICABIOGRAD and their partner the Indonesian Center for Rice Research (ICRR) have improved the phosphorus tolerance of Indonesian rice varieties Dodokan, Situ Bagendit and Batur.

“The new plants we are creating are not genetically modified; just bred using smarter breeding techniques,” says Joko. “The aim is to breed varieties identical to those that farmers already know and trust, except that they will have the PSTOL1 gene and an improved ability to take up soil phosphorus.”

Joko says that these varieties are currently being tested in field trials and it will take another 2–3 years before Indonesian farmers will have a variety that will yield as well if not better, needing 30–50 percent less fertiliser.

Evolving Indonesian plant research 

ICABIOGRAD team selecting breeding material in 2010. L-R: Masdiar Bustamam, Tintin Suhartini and Ida Hanarida.

GCP is as much about its people and partnerships as its research and products. ICABIOGRAD benefited from a GCP capacity-building grant in mid-2007 to enhance the institute’s capacity in phenotyping and molecular analysis. The grant covered, among other areas, intensive residential staff training at IRRI; PhD student support; infrastructure such as a moist room, temperature-controlled centrifuge apparatus, computers and appropriate specialised software; and  a blast innoculation room. These capacity-building activities were coordinated by Masdiar Bustamam who has since retired, but was then a Senior Scientist at ICABIOGARD.

But coming back to Joko and the PSTOL1 work, Joko started on this project in 2005 as a GCP-funded PhD student at Bogor Agriculture University, Indonesia. He is grateful to be part of a transnational project, which has offered him technical support that he would not otherwise have been able to receive through ICABIOGRAD alone.

IRRI visits ICABIOGRAD in 2009. L-R: Matthias Wissuwa, Sigrid Heuer (both IRRI), Masdiar Bustaman (ICABIOGRAD) and Joong Hyoun Chin

Joko believes the experience of working with IRRI, as a joint partner on this project, will leave an important, and lasting, legacy for researchers at ICABIOGRAD and ICRR. The partnership has also challenged the two local institutes to broaden their horizons past their borders.

“IRRI is teaching us how to use marker-assisted selection and we [ICABIOGRAD and ICRR] are just as busy identifying phosphorus-deficient hotspots in upland areas, choosing the best Indonesian recipient rice varieties for the gene, conducting the breeding and phenotyping testing,” he clarifies.

Breeding for sustainability

The ultimate goal of this project is to help Indonesian growers use marginal land.

Over half the world rice lands are deficient of ‘plant-available’ phosphorus, and Indonesia is no different. Joko explains that while there is plenty of phosphorus in the soil, plants are not able to access it.

“Other minerals in the soil like aluminum, calcium and iron are bound to phosphorus, shielding it from plants roots so they can only absorb a fraction of it.”

Field test of Pup1 lines at Taman Bogo , Indonesia.

In most countries, farmers apply phosphate fertilisers to their crops to combat this deficiency. For Joko this is not a sustainable approach for a lot of Indonesia’s farmers because the fertilisers are expensive and costs will continue to rise as phosphate supplies dwindle.

“Our approach is a lot more sustainable and cost-effective than applying fertiliser. We’ll breed these new plants for phosphorus-poor soils to produce more roots so they can find more phosphorus. The more phosphorus they find, the more of it they can absorb.”

Joko hopes these new plants will help farmers on marginal lands to obtain decent yields without having to spend money on expensive phosphate fertilisers.

“It’s great that our work has been recognised by Nature for publication, but what we really want is to help rice growers here in Indonesia and around the world.”

Links

 Older Entries  Newer Entries
cheap ghd australia