Nominations are now being accepted for the 2024 Jeanie Borlaug Laube Women in Triticum (WIT) awards honoring outstanding early-career scientists engaged in wheat research. The Borlaug Global Rust Initiative (BGRI) presents the WIT awards to acknowledge excellence and leadership among scientists in the initial stages of their careers. Recipients of the 2024 awards will benefit from advanced leadership and scientific training for wheat research, supported by the BGRI and the Accelerating Genetic Gains in Maize and Wheat project led by CIMMYT.
Applications will be accepted until January 31, 2024. These awards, named after Jeanie Borlaug Laube, chair of the BGRI and daughter of Nobel Peace Prize Laureate Norman E. Borlaug, have recognized the accomplishments of early-career scientists in wheat research worldwide since their establishment in 2010. To date, the BGRI has acknowledged over 70 deserving individuals.
An international cohort of scientists representing 12 countries gathered at the Kenya Agricultural and Livestock Research Organization (KALRO) station in Njoro for a comprehensive training course aimed at honing their expertise in wheat rust pathology.
With a mission to bolster the capabilities of National Agricultural Research Systems (NARS), the training course attracted more than 30 participants from diverse corners of the globe.
Maricelis Acevedo, a research professor of global development at Cornell and the associate director of Wheat DEWAS, underscored the initiative’s significance. “This is all about training a new generation of scientists to be at the forefront of efforts to prevent wheat pathogens epidemics and increase food security all over the globe,” Acevedo said.
This year’s training aims to prepare global scientists to protect against disease outbreaks that threaten wheat productivity in East Africa and South Asia. The course encompassed a wide array of practical exercises and theoretical sessions designed to enhance the participants’ knowledge in pathogen surveillance, diagnostics, modeling, data management, early warning assessments, and open science publishing. Presentations were made by DEWAS partners from the John Innes Centre, Aarhus University, the University of Cambridge and University of Minnesota.
(Photo: Borlaug Global Rust Initiative)
The course provided practical, hands-on experience in selecting and evaluating wheat breeding germplasm, race analysis and greenhouse screening experiments to enhance knowledge of rust diseases, according to Sridhar Bhavani, training coordinator for the course.
“This comprehensive training program encompasses diverse aspects of wheat research, including disease monitoring, data management, epidemiological models, and rapid diagnostics to establish a scalable and sustainable early warning system for critical wheat diseases such as rusts, fusarium, and wheat blast,” said Bhavani, wheat improvement lead for East Africa at CIMMYT and head of wheat rust pathology and molecular genetic in CIMMYT’s Global Wheat program.
An integral part of the program, Acevedo said, was the hands-on training on wheat pathogen survey and sample collection at KALRO. The scientists utilized the international wheat screening facility at KALRO as a training ground for hot-spot screening for rust diseases resistance.
Daisy Kwamboka, an associate researcher at PlantVillage in Kenya, said the program provided younger scientists with essential knowledge and mentoring.
“I found the practical sessions particularly fascinating, and I can now confidently perform inoculations and rust scoring on my own,” said Kwamboka said, who added that she also learned how to organize experimental designs and the basics of R language for data analysis.
DEWAS research leaders Dave Hodson, Bhavani and Acevedo conducted workshops and presentations along with leading wheat rust experts. Presenters included Robert Park and Davinder Singh from the University of Sydney; Diane Sauders from the John Innes Centre; Clay Sneller from Ohio State University; Pablo Olivera from the University of Minnesota; Cyrus Kimani, Zennah Kosgey and Godwin Macharia from KALRO; Leo Crespo, Susanne Dreisigacker, Keith Gardner, Velu Govindan, Itria Ibba, Arun Joshi, Naeela Qureshi, Pawan Kumar Singh and Paolo Vitale from CIMMYT; Chris Gilligan and Jake Smith from the University of Cambridge; and Jens Grønbech Hansen and Mogens S. Hovmøller from the Global Rust Reference Center at Aarhus University.
“I thoroughly enjoyed the knowledge imparted by the invited experts, along with the incredible care they have shown us throughout this wonderful training.”
Narain Dhar, Borlaug Institute for South Asia
For participants, the course offered a crucial platform for international collaboration, a strong commitment to knowledge sharing, and its significant contribution to global food security.
“The dedication of the trainers truly brought the training to life, making it incredibly understandable,” said Narain Dhar, research fellow at the Borlaug Institute for South Asia.
The event not only facilitated learning but also fostered connections among scientists from different parts of the world. These newfound connections hold the promise of sparking innovative collaborations and research endeavors that could further advance the field of wheat pathology.
The WIT awards are a premier recognition of talent and dedication of early-career women scientists and those who have excelled at mentoring women working in wheat and its nearest cereal relatives. This year’s winners are innovative wheat researchers from Malawi, Morocco, New Zealand, Spain, Tunisia and the United States.
“It is an honor to recognize these incredible scientists for their drive and vision in support of food security,” said Jeanie Borlaug Laube, chair of the BGRI and daughter of Nobel Prize Peace-winner Norman E. Borlaug. “My father believed that generations of hunger fighters would be needed to rid the world of food insecurity, and I’m proud to recognize these 2023 awardees for continuing to carry that mission forward.”
The WIT Early-Career Award provides women working in wheat with the opportunity for additional training, mentorship and leadership opportunities. The WIT Mentor Award recognizes the efforts of men and women who have played a significant role in shaping the careers of women working in wheat and demonstrated a commitment to increasing gender parity in agriculture.
“The WIT Awards have proven to be influential in shifting gender dynamics towards more equity in wheat science. WIT awardees are taking on leadership roles in scientific settings all over the world, and these newest awardees have the potential to continue that trend towards a more inclusive future,” said Maricelis Acevedo, director for science for the BGRI and research professor of global development in Cornell University’s College of Agriculture and Life Sciences.
Since founding the WIT awards in 2010, the BGRI has now recognized 71 early-career award winners from 31 countries and 13 mentors from 9 countries.
From Malawi, Veronica is a Ph.D student, University of Nottingham (UoN)-Rothamsted Research (RRes) in the United Kingdom, and Lilongwe University of Agriculture and Natural Resources (LUANAR) in Malawi. She focuses on exploiting the wider genetic variation among wheat and wild relatives to identify novel sources for increased grain zinc and iron concentration, and transfer these to African varieties.
From Morocco, Hafssa is genomic selection expert for the durum wheat breeding program at International Center for Agricultural Research in the Dry Areas (ICARDA) in Morocco. Her work is aimed at implementing genomic selection and speed breeding tools to deliver superior cultivars to national partners from Central and West Asia, North Africa, and West Africa.
From Spain, Marina is a fourth-year Ph.D. student at the John Innes Centre where she studies the post-anthesis development of the unpollinated wheat carpel under the supervision of Cristóbal Uauy and Scott Boden and in collaboration with KWS and Syngenta. Marina is applying a combination of approaches, including field trials, microscopy work, machine learning, and transcriptomics to better understand the genetic processes regulating different aspects of female fertility in bread wheat.
From New Zealand, Megan is a CERC Postdoctoral Research Fellow at the Commonwealth Scientific and Industrial Research Organisation (CSIRO). She focuses on developing molecular understanding of the interactions between rust fungi and wheat through structural biology and protein biochemistry, and recently adopted new artificial intelligence technologies in her work to facilitate structural analysis on a genome-wide scale for the purpose of exploiting structural conservation to engineer novel, durable genetic resistance in wheat and ensure effective utilization of current resistance.
From the United States, Amanda is a research geneticist at the U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS) at the Cereal Crops Research Unit in Fargo, North Dakota. Her current research program focuses on pre-breeding and germplasm improvement for both tetraploid and hexaploid wheat, focusing on the Great Plains region.
A dual citizen of Tunisia and the United States, Amor is vice president of the Borlaug Training Foundation. His work has spanned organizations on multiple continents, with positions at the University of Tunis, ICARDA, and CIMMYT. As Wheat Training Officer at CIMMYT from 2012-2018, he enhanced academic and hands-on training on wheat improvement for junior scientists from over 20 countries annually. There he developed a modular advanced wheat improvement course for mid-career scientists. In Tunisia he initiated the CRP-Wheat Septoria Precision Phenotyping Platform in Tunisia, where from 2015 to 2021 he fully involved graduate research as part of platform that led to women researchers earning seven Ph.D. and two MSc degrees in a six-year period.
For Charlotte Rambla, winning the 2022 Jeanie Borlaug Laube Women in Triticum (WIT) Early-Career Award was an “incredible, unreal experience.”
Each year, the Borlaug Global Rust Initiative (BGRI) honors five to six female early-career wheat researchers with the WIT award in recognition of scientific excellence and leadership potential. With the award, women scientists receive leadership training and professional development opportunities meant to support them as they join the community of scholars who are fighting hunger worldwide.
“The training I’ve received with this award has been one of the best experiences of my professional life,” said Rambla, an Italian native who recently completed her Ph.D. at the Queensland Alliance for Agriculture and Food Innovation in Australia and has begun a postdoctoral appointment at the Salk Institute for Biological Studies. “Meeting these incredible women working in the same field, sharing our knowledge and experiences, it felt like we belonged together and were working toward one shared purpose; We are all joined by this same passion for agriculture and science.”
The 2022 awards honored six early-career scientists from Morocco, Indonesia, Ethiopia, Italy, Pakistan and China. Since 2010, the WIT awards have recognized 66 early-career scientists from 29 different countries. The training and development opportunities offered to each year’s cohort varies, based on the needs and interests of the winners, said Maricelis Acevedo, director for science for the BGRI, research professor in the Department of Global Development at Cornell University, and a 2010 WIT awardee. The 2022 WIT cohort visited the World Food Prize Foundation in October, just before the foundation announced the winner of this year’s World Food Prize, widely considered the Nobel Prize for food and agriculture.
“The role of the WIT award is to recognize emerging scientific leadership and provide training and support for women working in wheat to create a cohesive group of hunger-fighters who have the skills to lead the next generation of scientists and create the solutions that we need at such a critical time,” Acevedo said. “As these women receive the award, we hope that they continue to support other women and other early-career scientists, and to train their students in a more open, diverse network.”
Meriem Aoun, a 2018 WIT awardee and native of Tunisia, was a postdoctoral associate at Cornell University when she won her award. Her cohort received a month-long training at the International Maize and Wheat Improvement Center (CIMMYT) – the center where Norman Borlaug did the research that earned him the 1970 Nobel Peace Prize – and attended the 2018 international BGRI conference in Morocco. Aoun believes that the WIT award supported her professional career development and gave her the opportunity to connect with other WIT winners from many countries. “I am thrilled to see more and more ambitious and career-interested wheat scientists and that our community of WIT winners is growing each year,” she said.
Now an assistant professor of wheat pathology at Oklahoma State University (OSU), Aoun studies the genetics of disease resistance to wheat pathogens. She is a key member of OSU’s wheat improvement team developing disease-resistant wheat varieties suited for Oklahoma and the Southern Great Plains of the U.S.
For 2013 winner and Swiss-Argentinian Sandra Dunckel, the fact that BGRI chooses a cohort of women each year, rather than a single winner, is one of the strengths of the award. Now head of Breeding Barley, Special Crops and Organics at KWS Group, a multinational seed company headquartered in Germany, Dunckel said the networking opportunities were among the most beneficial aspects of her WIT award training.
“There is this group of women who are working on a common goal, and even if you aren’t in touch for several years, you can contact someone from your year, or really any year, and say, ‘Hello, fellow WIT winner, I’m looking for a breeder with great potential for one of my teams, can you recommend someone, or I need help with this question.’ It’s always there to fall back on,” she said.
Dunckel won her WIT award while completing her PhD at Kansas State, then worked for two years as a wheat breeder in Australia before moving to her current role at KWS, where she oversees nine breeding teams across Europe who are working to develop new barley, peas, oats and protein crop varieties that are more tolerant to drought and heat, have desired quality profiles and can be grown more sustainably globally.
Paula Silva, a 2020 WIT awardee, also won her award while completing her PhD at Kansas State. She has since returned to her native Uruguay, where she leads the breeding team developing disease resistant varieties of barley and wheat for Uruguay’s National Institute of Agricultural Research (INIA). From 2019-2022, she coordinated breeding efforts with CIMMYT by leading the Precision field-based Phenotyping Platform (PWPP) for Multiple Resistance to Wheat Diseases.
One of the purposes of the WIT award is to help achieve gender parity among wheat scientists, and Silva said she believes the award “is playing a big part in building gender equality.”
Silva said that as a student, she was encouraged to apply for the WIT award by Sarah Evanega, who, along with Ronnie Coffman, international professor emeritus of plant breeding and genetics at Cornell, lobbied for the establishment of the WIT award. The BGRI now annually presents WIT honors to early-career scientists and a mentor award for excellence in advising of women working in wheat and its nearest relatives.
“Sarah was always advocating for young, female participation,” Silva said. “I remember her counting how many females there were in conference pictures, and I do that now, too. You can see, year by year, the female representation gets bigger and bigger.”
Full gender equality in science is still lacking, but progress is being made. The gains are seen in wider perspectives that challenge orthodoxy and improve scientific possibilities.
“The WIT awards are a fantastic way to recognize and support emerging leaders in our community. The impressive cohort of past and present WIT recipients are actively contributing to global efforts to improve crop production and food security,” said Alison Bentley, who now leads the Global Wheat Program at CIMMYT.
Part of Acevedo’s leadership role for BGRI is helping choose each year’s winner, as part of a panel that includes previous WIT awardees and globally recognized wheat scientists, and working with each cohort to develop appropriate training opportunities. Acevedo said as she progressed in her career, she realized how important it was to help young female scientists not only with traditional training and networking opportunities, but also with leadership, communication, and work-life balance.
“It’s really tough to be an isolated scientist: science can be very individualistic. It can be competitive. As women in science, we feel particularly isolated because a lot of our colleagues are males. So you may feel like, ‘This is only happening to me, I’m the only one struggling with this,’” Acevedo said. “In these trainings, we celebrate professional and personal successes but also share our challenges, normalize struggles, and find support. As we think about a more collaborative and open science, we need to be talking more about humbleness, the positive impact of recognizing and making peace with weakness, and seeking support from one another to thrive as a diverse research community.”
María Florencia Rodríguez García (cereal pathologist)
Ernesto Solís Moya (wheat breeder)
Jorge Iván Alvarado Padilla (wheat breeder)
The award recognizes the team’s long-term contribution to Mexican wheat cultivation and their efforts to expand impacts worldwide. They have released many varieties with resistance to leaf rust, which has led to the stabilization of the disease in bread wheat.
Presented annually, the award is bestowed upon a team of researchers serving a national breeding program or other nationally based institution. Winners receive an inscribed bronze statue of Norman Borlaug.
Huerta has been hosted by the International Maize and Wheat Improvement Center (CIMMYT) in Mexico since the late 1990s.
Julio Huerta, wheat pathologist and recipient of the BGRI Gene Stewardship Award 2022, giving a talk to students introducing CIMMYT’s wheat breeding program. (Credit: CIMMYT)
BGRI Technical Workshop
Receiving the prize at the 2022 BGRI Technical Workshop on September 9, Huerta said, “The award means a recognition from the global rust scientific community for the hard work (flesh, mind, soul and spirit) over the years, carried with many colleagues around the world to keep rust disease under control.”
Alison Bentley, director of the Global Wheat Program, also participated in the event with a presentation on the connection between conflict and vulnerability in global food systems. She explored reasons why wheat has been dramatically impacted by the conflict in Ukraine and summarized the proposed response agenda by CIMMYT.
Ravi Singh, head of global wheat improvement at the International Maize and Wheat Improvement Center (CIMMYT), received the 2021 Borlaug Global Rust Initiative (BGRI) Lifetime Achievement Award for his contribution to protecting wheat from new races of some of agriculture’s oldest and most devastating diseases.
Dave Hodson, International Maize and Wheat Improvement Center (CIMMYT) senior scientist delivered a large-scale overview of the current global wheat rust situation and the state of disease surveillance systems. He underscored the importance of comprehensive early warning systems and promising new detection tools that help to raise awareness and improve control. A new assessment of the early warning system for rust In Ethiopia showed a real impact on farmers’ interest, awareness, and farming practices to control the disease, as well as high-level policy changes.
Alison Bentley, CIMMYT Global Wheat Program director, described cutting-edge tools and methods by CIMMYT and, in particular, the Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project to increase wheat productivity in the face of changing climates. In addition to the new approaches on the supply side, she argued, we also need increased research on the demand side to better understand why farmers will choose a new variety, the role of markets and gender, and how we can scale up these systems. Bentley emphasized the criticality of supporting public and private sector efforts to get more improved germplasm into farmers’ fields in less time.
Philomin Juliana, CIMMYT Global Wheat Program associate scientist highlighted the pivotal role that data plays in breeding decisions and line advancements in CIMMYT’s wheat breeding program. This has been facilitated by improvements in how data sets, like genomic estimated breeding values (GEBVs), are shared with breeders. “CIMMYT has adopted a holistic, data-driven selection approach” that leverages phenotypic data, genomic-estimated breeding values (GEBVs) and selection indices, Juliana explained.
CIMMYT distinguished scientist Ravi Singh conducts research on a wheat field while. (Photo: BGRI)
World-renowned plant breeder Ravi Singh, whose elite wheat varieties reduced the risk of a global pandemic and now feed hundreds of millions of people around the world, has been announced as the 2021 Borlaug Global Rust Initiative (BGRI) Lifetime Achievement Award recipient.
Singh, distinguished scientist and head of Global Wheat Improvement at the International Maize and Wheat Improvement Center (CIMMYT), endowed hundreds of modern wheat varieties with durable resistance to fungal pathogens that cause leaf rust, stem rust, stripe rust and other diseases during his career. His scientific efforts protect wheat from new races of some of agriculture’s oldest and most devastating diseases, safeguard the livelihoods of smallholder farmers in the most vulnerable areas in the world, and enhance food security for the billions of people whose daily nutrition depends on wheat consumption.
“Ravi’s innovations as a scientific leader not only made the Cornell University-led Borlaug Global Rust Initiative possible, but his breeding innovations are chiefly responsible for the BGRI’s great success,” said Ronnie Coffman, vice chair of the BGRI and international professor of global development at Cornell’s College of Agriculture and Life Sciences. “Perhaps more than any other individual, Ravi has furthered Norman Borlaug’s and the BGRI’s goal that we maintain the global wheat scientific community and continue the crucial task of working together across international borders for wheat security.”
In the early 2000s, when a highly virulent rust race discovered in East Africa threatened most of the world’s wheat, Singh took a key leadership role in the formation of a global scientific coalition to combat the threat. Along with Borlaug, Coffman and other scientists, he served as a panel member on the pivotal report alerting the international community to the Ug99 outbreak and its potential impacts to global food security. That sounding of the alarm spurred the creation of the BGRI and the collaborative international effort to stop Ug99 before it could take hold on a global scale.
As a scientific objective leader for the BGRI’s Durable Rust Resistance in Wheat and Delivering Genetic Gain in Wheat projects, Singh led efforts to generate and share a series of elite wheat lines featuring durable resistance to all three rusts. The results since 2008 include resistance to the 12 races of the Ug99 lineage and new, high-temperature-tolerant races of stripe rust fungus that had been evolving and spreading worldwide since the beginning of the 21st century.
“Thanks to Ravi Singh’s vision and applied science, the dire global threat of Ug99 and other rusts has been averted, fulfilling Dr. Borlaug’s fervent wishes to sustain wheat productivity growth, and contributing to the economic and environmental benefits from reduced fungicide use,” Coffman said. “Ravi’s innovative research team at CIMMYT offered crucial global resources to stop the spread of Ug99 and the avert the human catastrophe that would have resulted.”
An innovative wheat breeder known for his inexhaustible knowledge and attention to genetic detail, Singh helped establish the practice of “pyramiding” multiple rust-resistance genes into a single variety to confer immunity. This practice of adding complex resistance in a way that makes it difficult for evolving pathogens to overcome new varieties of wheat now forms the backbone of rust resistance breeding at CIMMYT and other national programs.
Ravi Singh (center) with Norman Borlaug (left) and Hans Braun in the wheat fields at CIMMYT’s experimental station in Ciudad Obregón, in Mexico’s Sonora state. (Photo: CIMMYT)
The global champion for durable resistance
Ravi joined CIMMYT in 1983 and was tasked by his supervisor, mentor and friend, the late World Food Prize Winner Sanjaya Rajaram, to develop wheat lines with durable resistance, said Hans Braun, former director of CIMMYT’s Global Wheat Program.
“Ravi did this painstaking work — to combine recessive resistance genes — for two decades as a rust geneticist and, as leader of CIMMYT’s Global Spring Wheat Program, he transferred them at large scale into elite lines that are now grown worldwide,” Braun said. “Thanks to Ravi and his colleagues, there has been no major rust epidemic in the Global South for years, a cornerstone for global wheat security.”
Alison Bentley, Director of CIMMYT’s Global Wheat Program, said that “Building on Ravi’s exceptional work throughout his career, deployment of durable rust resistance in widely adapted wheat germplasm continues to be a foundation of CIMMYT’s wheat breeding strategy.”
Revered for his determination and work ethic throughout his career, Singh has contributed to the development of 649 wheat varieties released in 48 countries, working closely with scientists at national wheat programs in the Global South. Those varieties today are sown on approximately 30 million hectares annually in nearly all wheat growing countries of southern and West Asia, Africa and Latin America. Of these varieties, 224 were developed directly under his leadership and are grown on an estimated 10 million hectares each year.
In his career Singh has authored 328 refereed journal articles and reviews, 32 book chapters and extension publications, and more than 80 symposia presentations. He is regularly ranked in the top 1% of cited researchers. The CIMMYT team that Singh leads identified and designated 22 genes in wheat for resistance or tolerance to stem rust, leaf rust, stripe rust, powdery mildew, barley yellow dwarf virus, spot blotch, and wheat blast, as well as characterizing various other important wheat genome locations contributing to durable resistance in wheat.
Singh’s impact as a plant breeder and steward of genetic resources over the past four decades has been extraordinary, according to Braun: “Ravi Singh can definitely be called the global champion for durable resistance.”
The new interactive map allows visitors to visually explore the milestones that allowed a global network of researchers to fight threats to wheat production.
In 2005, preeminent wheat breeder and Nobel Laureate Norman E. Borlaug sounded the alarm to bring the world’s attention to the outbreak of a new variant of stem rust, Ug99, that threatened to wipe out 80% of the world’s wheat.
The result was the Borlaug Global Rust Initiative (BGRI), a global community that pioneered innovative ways for scientists and smallholder farmers around the globe to collaborate on meeting challenges brought about by wheat disease and climate change.
As a founding member of BGRI, the International Maize and Wheat Improvement Center (CIMMYT) and, later, the CGIAR Research Program on Wheat, played a crucial role in the core work of the initiative. They led breeding and large-scale international testing to develop disease resistant wheat varieties, coordinated closely with longstanding national partners to facilitate the release and spread of the varieties to farmers, and contributed to critical disease monitoring and tracking initiatives.
The BGRI has documented these efforts and related resources in a newly released interactive story map: Inside the global network safeguarding the world’s wheat from disease and climate change. The map highlights the BGRI’s efforts from 2005 to 2020 to introduce climate-resilient, disease-resistant wheat to resource-constrained wheat growers around the world, especially in sub-Saharan Africa and South Asia.
When a disease threatens to destroy the world’s most important food crop, who do you call?
The map highlights work undertaken by scientists on the front lines of the Durable Rust Resistance in Wheat (DRRW) and Delivering Genetic Gain in Wheat (DGGW) projects from 2005 to 2020. These achievements formed the foundation for the work that continues today under the auspices of the CIMMYT-led Accelerating Genetic Gains In Maize and Wheat for Improved Livelihoods (AGG) project.
BGRI scientists from more than 22 national and international agricultural research centers infused resilience into wheat and largely staved off large-scale rust epidemics, working with farmers in East Africa, South Asia and other important bread baskets of the world. The BGRI community improved breeding pipelines, created the world’s most sophisticated pathogen surveillance network, increased capacity in germplasm testing nurseries while conserving and sharing genetic resources, and training new generations of young scientists.
Through videos, photos, interviews, journal articles, blogs, news stories and other resources, the map allows visitors to explore the multifaceted work from hunger fighters in Australia, Canada, China, Ethiopia, India, Kenya, Mexico, Nepal, Russia, the United Kingdom, the United States and other countries.
Written and produced by BGRI cinematographer Chris Knight and associate director for communications Linda McCandless, the map is linked to multimedia and resources from contributors around the world.
The DRRW and DGGW projects received funding from the Bill & Melinda Gates Foundation, the UK Foreign, Commonwealth and Development Office, national research institutes, and Cornell University.
Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) brings together partners in the global science community and in national agricultural research and extension systems to accelerate the development of higher-yielding varieties of maize and wheat — two of the world’s most important staple crops. Funded by the Bill & Melinda Gates Foundation, the UK Foreign, Commonwealth & Development Office (FCDO), the U.S. Agency for International Development (USAID) and the Foundation for Food and Agriculture Research (FFAR), AGG fuses innovative methods that improve breeding efficiency and precision to produce and deliver high-yielding varieties that are climate-resilient, pest- and disease-resistant, highly nutritious, and targeted to farmers’ specific needs.
Research reported in this story was supported by the Foundation for Food and Agriculture Research under award number Grant ID COTF0000000001. The content of this publication is solely the responsibility of the authors and does not necessarily represent the official views of the Foundation for Food and Agriculture Research.
“We want to feed the people, we don’t want them to go hungry. We have to do something to make sure there is food on the table. That is where my motivation is… Let there be food to eat.”
— Ruth Wanyera, 2019
The International Maize and Wheat Improvement Center (CIMMYT) has long attributed its widespread impact and reach to strong collaborations with national agricultural research systems (NARS) around the world. Today, CIMMYT — and especially the Global Wheat Program and the CGIAR Research Program on Wheat — wish to honor one long-term collaborator whose work and dedication to wheat research has had abiding positive effects beyond her home region of sub-Saharan Africa.
Ruth Wanyera, national wheat research program coordinator at the Kenya Agricultural and Livestock Research Organization (KALRO), has spent her more than 30-year career dedicated to plant protection research, fueled by her motivation to “feed the people.” She was one of the first scientists to recognize stem rust in east Africa and has been one of CIMMYT’s strongest allies in fighting the devastating wheat disease, stem rust Ug99.
National Wheat Coordinator Ruth Wanyera (third from right) gives a lesson to pathology interns in the field of a fungicide efficiency trial at KALRO Njoro Research Station, Nakuru, Kenya. (Photo:CIMMYT)
A long-term relationship with CIMMYT
Sridhar Bhavani, senior scientist and head of Rust Pathology and Molecular Genetics at CIMMYT has worked closely with Wanyera and her team since the mid-2000s.
“Ruth is a passionate researcher who has tirelessly dedicated her entire career to cereal pathology, and as a team, we coordinated the stem rust phenotyping platform for over a decade and had great successes on multiple international projects,” he said.
CIMMYT’s relationship with Wanyera’s team strengthened when Nobel Prize Laureate Norman Borlaug visited the Kenyan research facility to observe the emerging threat of stem rust. Upon witnessing how serious the outbreak had become, Borlaug organized an emergency summit in Nairobi in 2005, famously “sounding the alarm” for swift and concerted action on stem rust, and ultimately leading to the establishment of the BGRI.
“Ruth and her team of dedicated scientists from KALRO have not only made Kenya proud but have also made a remarkable contribution to the global wheat community in mitigating the threat of stem rust Ug99,” says Bhavani. “Ruth has mentored master’s and PhD students who are now leading researchers at KALRO. She has elevated the research capacity of KALRO to international repute.”
Two recent wheat breeding projects helped extend the CIMMYT-KALRO partnership beyond Kenya. The Durable Rust Resistance in Wheat (DRRW) and Delivering Genetic Gain in Wheat (DGGW) projects brought in a partnership with the Ethiopia Institute for Agricultural Research (EIAR) to establish and operate stem rust phenotyping platforms that addressed the global threat of Ug99 and other serious stem rust races, and helped provide solutions for the region. Thanks to KALRO’s screening efforts at the CIMMYT-KALRO Stem Rust Screening Platform in Njoro, Kenya, CIMMYT-derived rust-resistant varieties now cover more than 90% of the wheat farming area in Kenya and Ethiopia.
Ruth Wanyera receives the Kenya Agricultural Research Award (KARA), during the High Panel Conference on Agricultural Research in Kenya. (Photo: CIMMYT)
The partnership continues to grow
Continued collaboration with Ruth’s team at KALRO will be essential in the new Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project. AGG — which aims to accelerate the development and delivery of more productive, climate-resilient, gender-responsive, market-demanded, and nutritious wheat varieties in in sub-Saharan Africa and South Asia — has a particular focus on enhanced collaboration with national partners such as KALRO.
Its success is also closely tied to the Njoro Stem Rust Screening Platform — which, since its establishment in 2008, has conducted crucial screening for over 600,000 wheat lines, varieties, varietal candidates, germplasm bank accessions and mapping populations. Wanyera’s leadership in the Platform, alongside that of CIMMYT wheat scientist Mandeep Randhawa, plays a major role in screening, monitoring, and clearing seed in time for sowing.
As Hans Braun, former director of the CIMMYT Global Wheat Program said, “Without our national agriculture research system partnerships, CIMMYT would become obsolete.”
Indeed, the unparalleled wealth of knowledge, skills, and research facilities of the CGIAR as a whole would not be so uniquely impactful if it weren’t for the 3000+ partnerships with national governments, academic institutions, enthusiastic farmers, private companies and NGOs that help carry out this work.
CIMMYT’s historic and continued impact depends on close international partnerships with scientists and leaders like Ruth Wanyera, and we congratulate her on her numerous awards, thank her for her collaboration, and wish her a pleasant retirement.
Wheat stalks grow in a field in India. (Photo: Saad Akhtar)
Wheat scientists in the Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project, led by the International Maize and Wheat Improvement Center (CIMMYT), presented a range of new research at the 2020 Borlaug Global Rust Initiative (BGRI) Technical Workshop in October, highlighting progress in spring wheat breeding, disease screening and surveillance and the use of novel genomic, physiological tools to support genetic gains.
Sridhar Bhavani, CIMMYT senior scientist and head of Rust Pathology and Molecular Genetics, delivered a keynote presentation on a “Decade of Stem Rust Phenotyping Network: Opportunities, Challenges and Way Forward,” highlighting the importance of the international stem rust phenotyping platforms established with national partners in Ethiopia and Kenya at the Ethiopian Institute for Agricultural Research station in Debre Zeit, and the Kenya Agricultural and Livestock Research Organization station in Njoro, respectively. These platforms support global wheat breeding, genetic characterization and pre-breeding, surveillance and varietal release, and will continue to be an important mechanism for delivering high performing material into farmers’ fields.
CIMMYT wheat breeder Suchismita Mondal chaired a session on breeding technologies, drawing on her expertise leading the trait delivery pipeline in AGG (including rapid generation cycling and speed breeding). She led a lively Q&A on the potential for genomics and data-driven approaches to support breeding.
In the session, CIMMYT Associate Scientist and wheat breeder Philomin Juliana presented a “Retrospective analysis of CIMMYT’s strategies to achieve genetic gain and perspectives on integrating genomic selection for grain yield in bread wheat,” demonstrating that phenotypic selection — making breeding selections based on physically identifiable traits — has helped increase the proportion of genes associated with grain yield in CIMMYT’s globally distributed spring wheat varieties. Her work demonstrates the efficiency of indirect selection for yield in CIMMYT’s Obregon research station, and the potential of genomic selection, particularly when incorporating environmental effects.
The use of Obregon as a selection environment was further explored by CIMMYT wheat breeder Leo Crespo presenting “Definition of target population of environments in India and their prediction with CIMMYT’s international nurseries.” This work confirms Obregon’s relevance as an effective testing site, allowing the selection of superior germplasm under distinct management conditions that correlate with large agroecological zones for wheat production in India. Similar analyses will be conducted in AGG with the support of the CGIAR Excellence in Breeding Platform to optimize selection conditions for eastern Africa.
A wheat field is fed by drip irrigation in Obregon, Mexico. (Photo: H. Gomez/CIMMYT)
Supporting future genetic gains
CIMMYT’s Head of Global Wheat Improvement Ravi Singh presented “Genetic gain for grain yield and key traits in CIMMYT spring wheat germplasm — progress, challenges and prospects,” highlighting the International Wheat Improvement Network as an important source of new wheat varieties globally. He described progress on the implementation of genomic selection and the use of state of the art tools to collect precise plant trait information, known as high-throughput phenotyping (HTP), in CIMMYT wheat breeding.
With partners, he is now conducting both genotyping (measuring the genetic traits of a plant) and phenotyping for all entries in the earliest stages of yield trials in Mexico. In addition, his team has succeeded in phenotyping a large set of elite lines at multiple field sites across South Asia. Looking forward, they aim to shorten generation advancement time, improve the parental selection for “recycling” (re-using parents in breeding), and adding new desirable traits into the pipeline for breeding improved varieties.
Following on from Ravi’s presentation, CIMMYT scientist Margaret Krause highlighted progress in HTP in her talk on “High-Throughput Phenotyping for Indirect Selection on Wheat Grain Yield at the Early-generation Seed-limited Stage in Breeding Programs.” This work highlights the potential of drones to capture highly detailed and accurate trait data, known as aerial phenotyping, to improve selection at the early-generation, seed-limited stages of wheat breeding programs.
This kind of physiological understanding will support future phenotyping and selection accuracy, as seen in the work that CIMMYT scientist Carolina Rivera shared on “Estimating organ contribution to grain-filling and potential for source up-regulation in wheat cultivars with contrasting source-sink balance.” Her research shows that a plant’s production of biomass is highly associated with yield under heat stress and that it is possible to achieve greater physiological resolution of the interaction between traits and environment to deliver new selection targets for breeding.
Overall, the talks by AGG scientists demonstrated tremendous progress in spring wheat breeding at CIMMYT and highlighted the importance of new tools and technologies to support future genetic gains.
TheBorlaug Global Rust Initiativeis an international community of hunger fighters committed to sharing knowledge, training the next generation of scientists, and engaging with farmers for a prosperous and wheat-secure world. The BGRI is funded in part through the Delivering Genetic Gain in Wheat (DGGW) project from the Bill & Melinda Gates Foundation and the UK Foreign, Commonwealth & Development Office.
After a 37-year career, Hans-Joachim Braun is retiring from the International Maize and Wheat Improvement Center (CIMMYT). As the director of the Global Wheat Program and the CGIAR Research Program on Wheat, Braun’s legacy will resonate throughout halls, greenhouses and fields of wheat research worldwide.
We caught up with him to capture some of his career milestones, best travel stories, and vision for the future of CIMMYT and global wheat production. And, of course, his retirement plans in the German countryside.
Beyh Akin (left) and Hans Braun in wheat fields in Izmir, Turkey, in 1989. (Photo: CIMMYT)
Major career milestones
Native to Germany, Braun moved to Mexico in 1981 to complete his PhD research at CIMMYT’s experimental station in Obrégon, in the state of Sonora. His research focused on identifying the optimum location to breed spring wheat for developing countries — and he found that Obrégon was in fact the ideal location.
His first posting with CIMMYT was in Turkey in 1985, as a breeder in the International Winter Wheat Improvement Program (IWWIP). This was the first CGIAR breeding program hosted by a CIMMYT co-operator, that later developed into the joint Turkey, CIMMYT and the International Center for Agricultural Research in the Dry Areas (ICARDA) winter wheat program. “In 1990, when the Commonwealth of Independent States was established, I saw this tremendous opportunity to work with Central Asia to develop better wheat varieties,” he said. “Today, IWWIP varieties are grown on nearly 3 million hectares.”
Although Braun was determined to become a wheat breeder, he never actually intended to spend his entire career with one institution. “Eventually I worked my entire career for CIMMYT. Not so usual anymore, but it was very rewarding. CIMMYT is at my heart; it is what I know.”
Hans Braun (center), Sanjaya Rajaram (third from right), Ravi Singh (first from right) and other colleagues stand for a photograph during a field day at CIMMYT’s experimental station in Ciudad Obregón, Sonora, Mexico. (Photo: CIMMYT)
“Make the link to the unexpected”
One of Braun’s standout memories was a major discovery when he first came to Turkey. When evaluating elite lines from outside the country — in particular lines from a similar environment in the Great Plains — his team noticed they were failing but nobody knew why.
Two of his colleagues had just returned from Australia, where research had recently identified micronutrient disorders in soil as a major constraint for cereal production. The team tried applying micro-nutrients to wheat plots, and it became crystal clear that zinc deficiency was the underlying cause. “Once aware that micro-nutrient disorders can cause severe growth problems, it was a minor step to identify boron toxicity as another issue. Looking back, it was so obvious. The cover picture of a FAO book on global soil analysis showed a rice field with zinc deficiency, and Turkey produces more boron than the rest of the world combined.”
“We tested the soil and found zinc deficiency was widespread, not just in the soils, but also in humans.” This led to a long-term cooperation with plant nutrition scientists from Cukurova University, now Sabanci University, in Istanbul.
But zinc deficiency did not explain all growth problems. Soil-borne diseases — cyst and lesion nematodes, and root and crown rot — were also widespread. In 1999, CIMMYT initiated a soil-borne disease screening program with Turkish colleagues that continues until today. Over the coming decade, CIMMYT’s wheat program will make zinc a core trait and all lines will have at least 25% more zinc in the grain than currently grown varieties.
After 21 years in Turkey, Braun accepted the position as director of CIMMYT’s Global Wheat Program and moved back to Mexico.
Left to right: Zhonghu He, Sanjaya Rajaram, Ravi Singh and Hans Braun during a field trip in Anyang, South Korea, in 1990. (Photo: CIMMYT)
Partnerships and friendships
Braun emphasized the importance of “mutual trust and connections,” especially with cooperators in the national agricultural research systems of partner countries. This strong global network contributed to another major milestone in CIMMYT wheat research: the rapid development and release of varieties with strong resistance to the virulent Ug99 race of wheat rust. This network, led by Cornell University, prevented a potential global wheat rust epidemic.
CIMMYT’s relationship with Mexico’s Ministry of Agriculture and the Obregón farmers union, the Patronato, is especially important to Braun.
In 1955, Patronato farmers made 200 hectares of land available, free if charge, to Norman Borlaug. The first farm community in the developing world to support research, it became CIMMYT’s principal wheat breeding experimental station: Norman Borlaug Experimental Station, or CENEB. When Borlaug visited Obregón for the last time in 2009, the Patronato farmers had a big surprise.
“I was just getting out of the shower in my room in Obregón when I got a call from Jorge Artee Elias Calles, the president of the Patronato,” Braun recalls. “He said, ‘Hans, I’m really happy to inform you that Patronato decided to donate $1 million.’”
The donation, in honor of Borlaug’s lifetime of collaboration and global impact, was given for CIMMYT’s research on wheat diseases.
“This relationship and support from the Obregón farmers is really tremendous,” Braun says. “Obregón is a really special place to me. I am admittedly a little bit biased, because Obregón gave me a PhD.”
Hans Braun (right) and colleagues in a wheat field in CIMMYT’s experimental station in Ciudad Obregón, Sonora, Mexico. (Photo: CIMMYT)
Norman Borlaug (left), Ravi Singh (center) and Hans Braun stand in the wheat fields at CIMMYT’s experimental station in Ciudad Obregón, in Mexico’s Sonora state. (Photo: CIMMYT)
Left to right: Sanjaya Rajaram, unknown, unknown, unknown, Norman E. Borlaug, unknown, Ken Sayre, Arnoldo Amaya, Rodrigo Rascon and Hans Braun during Norman Borlaug’s birthday celebration in March 2006. (Photo: CIMMYT)
Left to right: Hans Braun, Ronnie Coffman, Jeanie Borlaug-Laube, Thomas Lumpkin, Antonio Gándara, Katharine McDevitt and unknown during the unveiling of the Norman Borlaug statue at CIMMYT’s experimental station in Ciudad Obregón, Sonora, Mexico, in 2012. (Photo: Xochil Fonseca/CIMMYT)
Participants in the first technical workshop of the Borlaug Global Rust Initiative in 2009 take a group photo at CIMMYT’s experimental station in Ciudad Obregón, Sonora, Mexico. (Photo: CIMMYT)
A worldwide perspective
Braun’s decades of international research and travel has yielded just as many stories and adventures as it has high-impact wheat varieties.
He remembers seeing areas marked with red tape as he surveyed wheat fields in Afghanistan in the 1990s, and the shock and fear he felt when he was informed that they were uncleared landmine areas. “I was never more scared than in that moment, and I followed the footsteps of the guy in front of me exactly,” Braun recalls.
On a different trip to Afghanistan, Braun met a farmer who had struggled with a yellow rust epidemic and was now growing CIMMYT lines that were resistant to it.
“The difference between his field and his neighbors’ was so incredible. When he learned I had developed the variety he was so thankful. He wanted to invite me to his home for dinner. Interestingly, he called it Mexican wheat, as all modern varieties are called there, though it came from the winter wheat program in Turkey.”
Seeing the impact of CIMMYT’s work on farmers was always a highlight for Braun.
Hans Braun, Director of CIMMYT’s Global Wheat Program of CIMMYT, is interviewed by Ethiopian journalist at an event in 2017. (Photo: CIMMYT)
CIMMYT’s future
Braun considers wheat research to be still in a “blessed environment” because a culture of openly-shared germplasm, knowledge and information among the global wheat community is still the norm. “I only can hope this is maintained, because it is the basis for future wheat improvement.”
His pride in his program and colleagues is clear.
“A successful, full-fledged wheat breeding program must have breeders, quantitative genetics, pathology, physiology, molecular science, wide crossing, quality, nutrition, bioinformatics, statistics, agronomy and input from economists and gender experts,” in addition to a broad target area, he remarked at an acceptance address for the Norman Borlaug Lifetime Achievement award.
“How many programs worldwide have this expertise and meet the target criteria? The Global Wheat Program is unique — no other wheat breeding program has a comparable impact. Today, around 60 million hectares are sown with CIMMYT-derived wheat varieties, increasing the annual income of farmers by around $3 billion dollars. Not bad for an annual investment in breeding of around $25 million dollars. And I don’t take credit for CIMMYT only, this is achieved through the excellent collaboration we have with national programs.”
A bright future for wheat, and for Braun
General view Inzlingen, Germany, with Basel in the background. (Photo: Hans Braun)
After retirement, Braun is looking forward to settling in rural Inzlingen, Germany, and being surrounded by the beautiful countryside and mountains, alongside his wife Johanna. They look forward to skiing, running, e-biking and other leisure activities.
“One other thing I will try — though most people will not believe me because I’m famous for not cooking — but I am really looking into experimenting with flour and baking,” he says.
Despite his relaxing retirement plans, Braun hopes to continue to support wheat research, whether it is through CIMMYT or through long friendships with national partners, raising awareness of population growth, the “problem of all problems” in his view.
“We have today 300 million more hungry people than in 1985. The road to zero hunger in 2030 is long and will need substantial efforts. In 1970, Organization for Economic Co-Operation and Development (OECD) countries agreed to spend 0.7% of GDP on official development assistance. Today only 6 countries meet this target and the average of all OECD countries has never been higher than 0.4%. Something needs to change to end extreme poverty — and that on top of COVID-19. The demand for wheat is increasing, and at the same time the area under wheat cultivation needs to be reduced, a double challenge. We need a strong maize and wheat program. The world needs a strong CIMMYT.”
Left to right: Bruno Gerard, Ram Dhulipala, David Bergvinson, Martin Kropff, Víctor Kommerell , Marianne Banziger, Dave Watson and Hans Braun stand for a photograph at CIMMYT’s global headquarters in Texcoco, Mexico. (Photo: Alfonso Cortés/CIMMYT)
Former Director General of CIMMYT, Thomas Lumpkin (center), Hans Braun (next right) and Turkish research partners on a field day at a wheat landraces trial in Turkey. (Photo: CIMMYT)
Hans Braun (sixth from right) stands for a photograph with colleagues during a work trip to CIMMYT’s Pakistan office in 2020. (Photo: CIMMYT)
Hans Braun (seventh from left) visits wheat trials in Eskişehir, Turkey in 2014. (Photo: CIMMYT)
Cover photo: Hans Braun, Director of the Global Wheat Program at the International Maize and Wheat Improvement Center (CIMMYT), inspects wheat plants in the greenhouses. (Photo: Alfonso Cortés/CIMMYT)
Incoming CIMMYT Global Wheat Program director Alison Bentley speaks at Borlaug Global Rust Initiative Workshop. (Photo: CIMMYT)
Alison Bentley, who will be joining the International Maize and Wheat Improvement Center (CIMMYT) next month as director of the Global Wheat Program and the CGIAR Research Program on Wheat, joined wheat research colleagues at the Borlaug Global Rust Initiative Technical Workshop last week to introduce herself and offer her perspective on current prospects for wheat research.
Bentley, who currently serves as director of Genetics and Breeding at the National Institute of Agricultural Botany in the UK, emphasized the efforts of CIMMYT and partner scientists in the Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project.
“AGG is unique, and it’s something that’s really close to my heart in harnessing innovations and deploying them in breeding to deliver genetic gains,” she said.
Bentley gave workshop attendees a sneak preview of new speed breeding facilities in CIMMYT’s Toluca experimental station, which will help wheat breeders reduce cycle time, saving costs and getting high yielding, improved varieties tested and in farmers’ fields more quickly.
“There has never been a more exciting time to be involved in wheat research and breeding,” she told the gathering.
See Alison Bentley’s full presentation from the BGRI Technical Workshop below.
Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) is a 5-year project that brings together partners in the global science community and in national agricultural research and extension systems to accelerate the development of higher-yielding varieties of maize and wheat — two of the world’s most important staple crops. Funded by the Bill & Melinda Gates Foundation, the UK Foreign, Commonwealth & Development Office (FCDO), the U.S. Agency for International Development (USAID) and the Foundation for Food and Agriculture Research (FFAR), AGG fuses innovative methods that improve breeding efficiency and precision to produce and deliver high-yielding varieties that are climate-resilient, pest- and disease-resistant, highly nutritious, and targeted to farmers’ specific needs.
Hans-Joachim Braun, director of CIMMYT’s Global Wheat Program, speaks at the 8th International Wheat Conference in 2010. Braun has dedicated nearly four decades to wheat research. (Photo: Petr Kosina/CIMMYT)
Hans Braun, director of the Global Wheat Program at the International Maize and Wheat Improvement Center (CIMMYT), has received the Norman Borlaug Lifetime Achievement Award for nearly four decades of wheat research. He received the award on October 9, 2020, during the virtual Borlaug Global Rust Initiative (BGRI) Technical Workshop.
“We rest on the shoulders of a lot of mighty people who have come before us,” said Ronnie Coffman, vice chair of BGRI, speaking to a global audience of wheat scientists and farmers as he presented four individuals with the award. “Each of these individuals has contributed to the improvement of wheat and smallholder livelihoods in major and enduring ways.”
Responsible for technical direction and implementation of the Global Wheat Program at CIMMYT and the CGIAR Research Program on Wheat (WHEAT), Braun leads and manages a team of 40 international scientists who develop wheat germplasm. This germplasm is distributed to around 200 cooperators in wheat-producing countries worldwide, and is responsible for the derived varieties being grown on more than 50% of the spring wheat area in developing countries.
Lifetime achievement
With the Norman Borlaug Lifetime Achievement Award, the BGRI community honors four individuals who have been integral to the initiative. (Photo: BGRI)
“In his 35 years with CIMMYT, Hans has become familiar with all major wheat-based cropping systems in the developing and developed world,” said Coffman, who called Braun an important collaborator and close personal friend.
“Hans was integral to the BGRI’s efforts in preventing Ug99 and related races of rust from taking out much of the 80% of the world’s wheat that was susceptible when Ug99 was first identified in 1999,” Coffman explained. He “has been an integral partner in the development and implementation of the Durable Rust Research in Wheat (DRRW) and Delivering Genetic Gain in Wheat (DGGW) projects.”
Braun delivered a keynote speech accepting the award and discussing the bright future of wheat, despite the many challenges that lie ahead.
“The future of wheat improvement in developing countries remains on the shoulders of public organizations and institutions. It is paramount that we share germplasm, information and knowledge openly,” he said.
He emphasized the need to “keep the herd together” and maintain strong, global partnerships.
Braun also noted the importance of continuing to improve nutritional content, growing within planetary boundaries, and taking farmers’ preferences seriously. He highlighted CIMMYT’s exceptional capacity as one of the world’s largest and most impactful wheat breeding programs, and encouraged national partners to continue their close collaboration.
He recalled what Norman Borlaug told him in 2004, when he became head of the Global Wheat Program: “Hans, I have confidence you can lead the program and I will always help you” — and how he did.
“I would like to thank all with whom I cooperated over four decades and who contributed to make CIMMYT’s program strong,” concluded Hans. “I am very optimistic that the global wheat community will continue to develop the varieties farmers need to feed 10 billion.”
Wheat blast damages wheat spikes. (Photo: Xinyao He / CIMMYT)
In an article published in Nature Scientific Reports, a team of scientists led by wheat breeder Philomin Juliana from the International Wheat and Maize Improvement Center (CIMMYT) conducted a large genome-wide association study to look for genomic regions that could also be associated with resistance to wheat blast.
Juliana and fellow scientists found 36 significant markers on chromosome 2AS, 3BL, 4AL and 7BL that appeared to be consistently associated with blast resistance across different environments. Among these, 20 markers were found to be in the position of the 2NS translocation, a chromosomal segment transferred to wheat from a wild relative, Aegilops ventricosa, that has very strong and effective resistance to wheat blast.
The team also gained excellent insights into the blast resistance of the globally-distributed CIMMYT germplasm by genomic fingerprinting a panel over 4,000 wheat lines for the presence of the 2NS translocation, and found that it was present in 94.1% of lines from International Bread Wheat Screening Nurseries (IBWSNs) and 93.7% of lines from Semi-Arid Wheat Screening Nurseries (SAWSNs). Although it is reassuring that such a high percentage of CIMMYT wheat lines already have the 2NS translocation and implied blast resistance, finding other novel resistance genes will be instrumental in building widespread, global resilience to wheat blast outbreaks in the long-term.
The researchers used data collected over the last two years from CIMMYT’s IBWSNs and SAWSNs by collaborators at the Bangladesh Wheat and Maize Research Institute (BWMRI) and Bolivia’s Instituto Nacional de Innovación Agropecuaria y Forestal (INIAF).
Devastating fungal disease
Wheat blast, caused by the fungus Magnaporthe oryzae pathotype Triticum, was first identified in 1985 in South America, but has been seen in Bangladesh in recent years. The expansion of the disease is a great concern for regions of similar environmental conditions in South Asia, and other regions globally.
Although management of the disease using fungicide is possible, it is not completely effective for multiple reasons, including inefficiency during high disease pressure, resistance of the fungal populations to some classes of fungicides, and the affordability of fungicide to resource-poor farmers. Scientists see the development and deployment of wheat with genetic resistance to blast as the most sustainable and farmer-friendly approach to preventing devastating outbreaks around the world.
This work was made possible by the generous support of the Delivering Genetic Gains in Wheat (DGGW) project funded by the Bill & Melinda Gates Foundation, the U.K. Foreign, Commonwealth & Development Office (FCDO) and managed by Cornell University, the U.S. Agency for International Development’s Feed the Future initiative, the CGIAR Research Program on Wheat (WHEAT), the Indian Council of Agricultural Research (ICAR), The Swedish Research Council (Vetenskapsråd), and the Australian Centre for International Agricultural Research (ACIAR).
Nominations are now being accepted for the 2024 Jeanie Borlaug Laube Women in Triticum (WIT) awards honoring outstanding early-career scientists engaged in wheat research. The Borlaug Global Rust Initiative (BGRI) presents the WIT awards to acknowledge excellence and leadership among scientists in the initial stages of their careers. Recipients of the 2024 awards will benefit from advanced leadership and scientific training for wheat research, supported by the BGRI and the Accelerating Genetic Gains in Maize and Wheat project led by CIMMYT.
