A newly published study has identified a significant breakthrough in the ongoing battle against wheat blast: a novel quantitative trait locus (QTL), named Qwb.cim-7D, located on the long arm of chromosome 7D and derived from Aegilops tauschii, offers stable and moderate resistance to wheat blastâindependently of the widely used 2NS translocation.
Wheat blast, caused by Magnaporthe oryzae pathotype Triticum (MoT), is a rapidly spreading disease threatening wheat production, particularly in tropical and subtropical regions of the world. First detected in Brazil in 1985, the disease has since caused devastating yield lossesâup to 100% in severe cases. Its transboundary spread, including recent incursions in Bangladesh and Zambia, has intensified international concerns about food security, especially among vulnerable smallholder farming communities. Control through chemical means has proven unreliable, placing even greater emphasis on the development and deployment of resistant wheat cultivars.
Fig. 1 Global incidence of wheat blast with years of its first identification indicated for the affected countries
For years, wheat breeders have relied on a single major source of genetic resistanceâthe 2NS/2AS translocation from Aegilops ventricosa. While initially effective, recent field observationsâparticularly in Brazilâsuggest that wheat blast pathogens are evolving to overcome this resistance. Despite extensive efforts, previous studies have failed to identify any non-2NS QTLs with both significant and stable effects across environments in field trials.
Fig. 2 Contrasted wheat blast reactions between BWMRI Gom 3 (left, a 2NS carrier) and BARI Gom 26 (right, a non-2NS carrier)
A New Genetic Solution for Blast Resistance
In a recently published study entitled âA novel QTL on chromosome 7D derived from Aegilops tauschii confers moderate field resistance to wheat blastâ, CIMMYTâs wheat pathology team and collaborators reported the identification of a novel and consistent QTLâQwb.cim-7Dâwhich provides significant resistance to wheat blast independent of the 2NS translocation.
The donor bread wheat line, Gladius*2/KU 2097, inherited its resistance from the resistant Ae. tauschii accession ‘KU-2097’. Field experiments were conducted at two Precision Phenotyping Platforms (PPP) in Bolivia (Quirusillas and Okinawa) and one PPP in Bangladesh (Jashore), under artificially inoculated conditionsâensuring a robust evaluation of resistance. The QTL was mapped to the long arm of chromosome 7D, where it explained between 7.7% and 50.6% of the phenotypic variation across different environments. This is a significant finding, as previous studies identified non-2NS resistance loci with typically small effects (less than 10%) and inconsistent performance. In contrast, Qwb.cim-7D is the first moderate-effect QTL to demonstrate stable resistance across multiple field conditions.
To facilitate its adoption in breeding pipelines, researchers successfully converted the flanking DArTseq markers into KASP markersâenabling more efficient marker-assisted selection.
Importantly, Qwb.cim-7D provides approximately half the resistance effect of 2NS, highlighting its value as a complementary resistance factor. When deployed through gene pyramiding strategies alongside 2NS and Rmg8, this new QTL could help breeders develop varieties with stronger and more durable resistance to the evolving wheat blast pathogen.
This breakthrough marks a turning point in global wheat blast resistance breeding. It addresses the urgent need to diversify the genetic basis of resistance and equips breeders with a viable new tool to safeguard wheat yields. As wheat blast continues to threaten food security in key regions, the introgression of Qwb.cim-7D into breeding programs offers a promising path toward enhanced crop resilience and improved farmer protection.
Extensive multi-year field trials conducted by CIMMYT in Mexico played a pivotal role in validating the efficacy of the Trehalose 6-phosphate (T6P) spray treatment, confirming its potential to boost wheat yields by up to 12%. Despite challenges posed by fluctuating rainfallâan increasingly common constraint under climate changeâCIMMYTâs trial plots consistently outperformed untreated controls across four consecutive crop cycles. These results underscore CIMMYTâs leadership in translating laboratory innovations into resilient, field-ready solutions that enhance food security while advancing sustainable agrifood systems in diverse agroecological conditions.
CIMMYT is pleased to announce the appointment of Flavio Breseghello as the new Director of the Global Wheat Program. A renowned wheat breeder and leader in agricultural research, Breseghello will guide CIMMYTâs flagship wheat initiative at a pivotal moment for global food security.Â
âCIMMYTâs wheat program has long been a cornerstone of global food security,â said Breseghello. âIâm honored to contribute to this legacy, while helping shape its future in the face of new challenges.âÂ
With over two decades of experience advancing wheat research in Brazil and internationally, Breseghello brings scientific expertise and strategic vision to the role. His appointment underscores CIMMYTâs commitment to science-driven innovation that responds to evolving global needsâparticularly in low- and middle-income countries where wheat is a staple crop and climate resilience is increasingly urgent.Â
âClimate change is reshaping the risks and realities for wheat farmers in low- and middle-income countries,â Breseghello said. âOur challengeâtogether with our partnersâis to stay ahead of these threats with science that is inclusive, adaptive, and driven by the needs of the most vulnerable.âÂ
CIMMYTâs Global Wheat Program is at the forefront of developing high-yielding, climate-resilient, and disease-resistant wheat varieties that feed over 2.5 billion people around the world. As director, Breseghello will lead efforts to strengthen international research collaboration, expand capacity building, and ensure the programâs innovations reach those who need them most.Â
âFlavio is a globally respected leader whose deep experience and inclusive approach will be a tremendous asset to the program and to the global wheat community,â said Bram Govaerts, Director General of CIMMYT. âWe are thrilled to welcome him to this vital role.âÂ
Away Hamza, a young and ambitious farmer in Arsi Zone, Oromia region, proudly tends to his wheat field (Photo: CIMMYT)
Wheat plays a pivotal role in Ethiopiaâs agricultural landscape. As the countryâs second most important staple crop, it is crucial to national food security. Traditionally, wheat cultivation has been concentrated in Ethiopiaâs highlands, but this has changed with the introduction of the ADAPT-Wheat projectâan initiative designed to address the production challenges faced by Ethiopia’s irrigated lowland areas. Led by CIMMYT in partnership with the Ethiopian Institute of Agricultural Research (EIAR), the project aims to tackle key issues such as the lack of stress-tolerant wheat varieties and limited access to reliable seed sources.
Transforming wheat farming in Ethiopiaâs lowlands
The Adaptation, Demonstration, and Piloting of Wheat Technologies for Irrigated Lowlands of Ethiopia (ADAPT-Wheat) project focuses on bridging critical wheat production gaps and introducing innovative solutions for smallholder farmers, particularly in the Afar and Oromia regions. By improving wheat production through new varieties and modern technologies, the project is not only increasing agricultural productivity but also transforming farmers’ livelihoods. The initiative aims to directly benefit 1,000 households, with a much wider impact expected across the two regions.
Financially supported by BMZ, the project aligns with Ethiopiaâs broader goal of achieving food self-sufficiency. Researchers and national partners have witnessed a significant shift in wheat production practices, demonstrating the success of innovative agricultural technologies and improved collaboration among stakeholders.
Insights from researchers and partners
Bekele Abeyo, CIMMYT-Ethiopia Country Representative and project leader:
âThe ADAPT-Wheat project marks a major milestone in Ethiopiaâs wheat production journey. It introduces viable wheat technologies that are well-suited for the irrigated lowlands, enhancing both production and productivity in the pursuit of food and nutritional security.âÂ
Tolossa Debele, senior researcher and EIAR–DG representative:
âFor years, CIMMYT has been instrumental in advancing Ethiopiaâs wheat production system by introducing germplasm, improving varieties, and offering financial, equipment &technical support and training for both researchers and farmers. With the ADAPT-Wheat project, weâve seen another tangible difference in the livelihoods of smallholder farmers, particularly in the Afar and Oromia regions. The projectâs support, including the introduction of modern farm machinery, has not only enhanced mechanization at the farm level but has also contributed significantly to the broader objectives of national agricultural development.â Â
Tolossa Debele, senior researcher and EIAR-DG representative (Photo: CIMMYT)
Major milestones and achievements
1. Building capacity for sustainable change
One of the projectâs most significant accomplishments has been its strong emphasis on capacity buildingâboth human and physicalâto empower local communities in wheat farming. Key capacity-building initiatives include:
Training for researchers: Software and scientific writing training to enhance technical skills and scientific contributions.
Training of trainers (TOT) for agricultural experts: Development agents and district-level subject matter specialists were trained to share knowledge with farmers.
The project also included seed distribution, experience-sharing visits, and field days to disseminate knowledge and encourage peer learning. A notable outcome has been informal seed exchange among farmers, amplifying the projectâs impact.
Through these efforts, the project successfully reached approximately 4,300 households and engaged a wide range of stakeholders, contributing to human capacity development, seed production and distribution, technology diffusion, and sustainable farming practices.
Additionally, infrastructure developmentâsuch as the construction of a quarantine facility and installation of air conditioning units at the Werer Research Centerâhas strengthened research capacity and maintained high standards for agricultural innovation. The procurement of essential farm machinery has also set the stage for more sustainable wheat farming in Ethiopiaâs lowlands.
2. Introducing elite wheat lines
The project introduced 505 elite bread wheat lines and 235 durum wheat lines. From these, 111 bread wheat and 49 durum wheat genotypes were identified for their promising traits, including heat stress tolerance, early maturity, and superior yield components. These lines were rigorously tested across diverse agroecological zones to ensure adaptability.
3. Demonstrating modern irrigation technology and mechanization
The project didnât stop at improving wheat varietiesâit also introduced modern mechanization practices to enhance efficiency and yield. In the Afar and Oromia regions, pilot farms demonstrated advanced machinery such as:
Subsoilers
Bailers
Land levelers
Planters
Ridge makers
Multi-crop threshers
These technologies have been showcased at various farm sites to facilitate adaptation and scaling.
4. Releasing and adapting wheat varieties
The project identified eight wheat varieties (four bread wheat and four durum wheat) suited for Ethiopiaâs lowland irrigated conditions.
Additionally, two new wheat varietiesâone bread wheat and one durum wheatâwere officially registered and released for large-scale production. These releases mark a significant milestone in Ethiopia’s efforts to strengthen wheat production systems.
5. Seed production and distribution
Ensuring the availability of high-quality seeds has been another key priority. Through partnerships with research centers, early-generation seeds were provided to private seed producers and farmersâ cooperative unions. Field monitoring ensured seed quality at harvest, resulting in the production of 430 quintals of certified seed.
Women and youth empowerment strategy
The ADAPT-Wheat project has made a deliberate effort to empower women and youth by ensuring they have access to high-quality seeds, training, and technical support. Notably, women comprised 32% of seed distribution beneficiaries, strengthening their role in improving food security and livelihoods.
Voices from the field: Farmers share their stories
Damma Yami from Jeju district, Alaga Dore village
Farmer Damma Yami, has carefully monitors her thriving wheat crop as it nears harvest (Photo: CIMMYT)
Damma Yamiâs story is a powerful example of how innovative agricultural initiatives can transform communities, especially in regions facing harsh environmental conditions.
âFor many years, we have lived in arid conditions where livestock farming was our primary livelihood. However, with the challenges posed by weather trends, our traditional systems were no longer sufficient to maintain our livelihoods. The introduction of the ADAPT-Wheat project in recent years has reversed this trend. The project brought us wheat cultivation, as a new and golden opportunity for the farming community. We received high-yielding seeds, training, and technical support on farming practices, and soon we began to see impressive results. The benefits of the project are clear: it provides food for our families, generates income to send children to school, and helps meet other basic needs. As a farmer who engaged in this project, I can confidently say that the project has reshaped our future livelihood.â
Yeshiwas Worku from Oromia region, Arsi Zone, Merti district, Woticha Dole village
Farmer Yeshiwas Worku actively monitoring the growth and performance of his wheat crop on his plot, ensuring optimal results through the support of the ADAPT project (Photo: CIMMYT)
Yeshiwas Worku, a 40-year-old farmer was among those who benefited from the project.
Yeshiwas explains that before the project, wheat cultivation was not traditionally practiced in his area, but it has now become a game-changer for the community. The introduction of modern farming tools, machinery, and access to improved crop varieties has been key to their success. With the help of the project, wheat production has not only become their main source of income but has also helped farmers gain confidence in their ability to sustain their livelihoods.
âWe are now familiar with modern farming tools, machines, and practices thanks to the implementing partners of the ADAPT project. We also have access to improved crop varieties, which are crucial for better production and increased income. Now, wheat production has become the main source of our livelihood. This alternative farming opportunity has not only boosted our confidence but has also allowed us to secure a more sustainable livelihood for my family and me. I am deeply grateful to the project implementing partners for playing such a crucial role in transforming our lives. The impact has truly been transformative.â
A transformative impact on wheat production
The ADAPT-Wheat project, alongside CIMMYTâs ongoing work in Ethiopia, has significantly improved wheat production systems and enhanced the livelihoods of smallholder farmers in the lowland regions. More than just a This project is technological intervention, the project serves as a lifeline for smallholder farmers. By introducing innovative wheat technologies, improving seed availability, and empowering local communities, it directly contributes to Ethiopiaâs food security goals while fostering economic growth and resilience in rural areas.
As Ethiopia continues its journey toward agricultural self-sufficiency, the success of the ADAPT-Wheat project serves as a model for sustainable agricultural development.
In Memory of Leonardo Crespo Herrera
Senior Scientist, Bread Wheat Improvement â Global Wheat Program
With great sadness, we share the news of the passing of Leonardo Crespo Herrera, senior scientist in the Global Wheat Program at CIMMYT. A brilliant researcher and deeply valued colleague, Leonardo leaves behind a legacy of excellence in wheat science and a lasting impact on those who had the privilege of working alongside him.
Leonardo joined CIMMYT in 2015 as a postdoctoral fellow, bringing with him an unwavering dedication to advancing wheat research for global food security. Over the next decade, his work helped shape the future of wheat breeding. As an Associate Scientist, he played a key role in leading breeding efforts, mentoring young scientists, and fostering collaboration with national and international partners.
His scientific contributions were extensive, and his research continues to benefit farming communities around the world. Those who wish to learn more about his work and its impact can explore a selection of his achievements:
Beyond his professional accomplishments, Leonardo was known for his warmth, generosity, and inclusive spirit. He made others feel welcome and supported. Colleagues remember him not only as an exceptional scientist, but also as a kind-hearted, trusted mentor, loyal friend, and inspiring leader.
We extend our deepest condolences to his family, friends, and all who knew and admired him. Leonardoâs legacy will continue to grow through the lives he touched and the science he so passionately advanced.
Dr. Rosichan joins IWYP after 30 years as an R&D leader in both the private and public sectors. During that time, he led complex multinational, multidisciplinary and multifunctional research teams. Most recently he was Scientific Program Director for the Foundation for Food and Agriculture Research (FFAR) where he was the Director for the Crops of the Future Consortium and Next Generation Crops Challenge Area. He will continue to reside in the USA.
BBSRC has provided the consultancy position in recognition of the valuable achievements of IWYP in serving the wheat scientific community over these past 10 years during which IWYP has been funded and guided by numerous governmental funding agencies and private sector wheat breeding companies.
IWYP’s strong links are with scientists studying yield-related wheat traits all over the world as well as with many breeding programs, public and private. IWYP’s mission is to serve breeding programs, especially through its Hubs in CIMMYT, Mexico, Kansas State University in the USA and the National Institute of Agricultural Botany in the UK, by delivering trait-improved elite germplasm.
Senior representatives from CIMMYT visited the John Innes Centre to strengthen their strategic partnership focused on advancing global wheat research. Key collaborative efforts include the Wheat Disease Early Warning Advisory System (DEWAS) and research on genetic resistance to wheat blast. CIMMYTâs Director General, Dr. Bram Govaerts, emphasized the long-standing partnershipâs global impact, noting that around 70% of the worldâs wheat is linked to CIMMYTâs network. Dr. Sarah Hearne, Chief Science and Innovation Officer, highlighted the shared commitment to providing sustainable solutions that enhance farmersâ resilience and productivity worldwide.
Building on the success of their initial project, CropSustaiN, CIMMYT and the Novo Nordisk Foundation are proud to announce an expanded partnership aimed at tackling agricultureâs biggest challenges. This enhanced collaboration will broaden efforts to transform farming practices, reduce environmental impacts, and support farmers worldwide.
From specific solutions to a broader vision:
The initial partnership focused on developing innovative wheat varieties through Biological Nitrification Inhibition (BNI), significantly reducing the need for nitrogen fertilizers. Now, this expanded collaboration sets a foundation for exploring a wider range of initiatives, including:
Climate-smart crop systems with reduced greenhouse gas emissions.
Advanced agricultural technologies for greater resilience and sustainability.
Inclusive tools to empower farmers globally.
Bram Govaerts, CIMMYTâs director general, said:
“This partnership exemplifies how collaboration and science can transform agriculture, addressing both food security and environmental sustainability on a global scale.”
This next phase reflects a shared commitment to creating a sustainable future by turning scientific innovation into actionable, real-world impact for millions of farmers worldwide.
Matthew Reynolds, Distinguished Scientist and Head of Wheat Physiology at CIMMYT, is the recipient of the 2024 China Friendship Award. This recognition highlights his cutting-edge research to enhance the climate resilience and yield of wheat cropping systems, as well as his dedication to fostering collaboration between CIMMYT and China.
Researcher, Innovator, Collaborator, Mentor
During his 35-year tenure at CIMMYT, Reynolds has played a pivotal role in developing a new generation of advanced wheat lines based on physiological breeding approaches. This work has led to the creation of more resilient wheat varieties from diverse gene pools, significantly boosting yield potential.
Reynolds is the eighth CIMMYT scientist to receive the China Friendship Award. His numerous accolades include being an elected member of the Mexican Academy of Sciences and earning fellowships with the American Society of Agronomy and the Crop Science Society of America (CSSA), the latter representing the societyâs highest individual honor. He has also been honored with the prestigious 2024 International Crop Science Award by CSSA.
A prolific author in crop physiology and genomics, Reynolds actively promotes international collaboration among wheat scientists, tapping expertise and emerging technologies that enhance plant science. He provides young scientists with mentorship and opportunities to engage in agricultural research. He also leads key initiatives, such as the International Wheat Yield Partnership (IWYP) and the Heat and Drought Wheat Improvement Consortium (HEDWIC), which leverage collective expertise and innovations to improve yields and climate resilience.
About the China Friendship Award
The China Friendship Award is the highest honor given by the Chinese government to foreign experts who have made outstanding contributions to China’s economic and social progress. It was established in 1991 by the State Administration of Foreign Experts Affairs under the authorization of the State Council of the People’s Republic of China. As of September 2024, a total of 1,998 experts from over 80 countries and regions have received this award.
Thatâs how much farmers have saved this century, through use of disease-resistant wheat varieties. Modern wheat can thank its âwild relativesâ â grassy cousins millions of years old and tested through extremes of earthâs climate â for most of its resistance genes.
Despite such remarkable achievements in wheat breeding, weâve only scratched the surface of the genetic potential in wheatâs wild relatives. With climate change intensifying and the rapid evolution and spread of pathogens â a new strain of fungus can circulate in the jet streamâitâs imperative that we increase investment in researching this largely untapped genetic diversity. Doing so could revolutionize wheat production, ensuring food security while dramatically reducing agricultureâs environmental footprint.
Without such efforts, epidemics or pandemics could devastate yields, potentially leading to massive applications of toxic agrochemicals and increased selection pressure for pests and diseases to develop resistance. The consequences would be far-reaching, impacting not only food security and the environment, but also geopolitical stability, potentially triggering human migration and conflict.
Today, wheat is the most widely grown crop on Earth, providing 20% of all human protein and calories and serving as the primary staple food for 1.5 billion people in the Global South.
However, with its future under threat, standard breeding approaches can no longer keep up with the pace of climate change. Research shows that climate shifts from 1980-2008 reduced wheat harvests by 5.5%, and global wheat production falls 6% for every degree-centigrade increase in temperature.
Wheat science urgently requires enhanced investments to scale up genetic studies of wild relatives, utilizing next-generation breeding tools. These tools include gene sequencing technologies, big-data analytics, and remote sensing technologies. Satellite imagery makes the planet a laboratory, allowing researchers to monitor traits like plant growth or disease resistance globally. Artificial intelligence can super-charge breeding simulations and quickly identify promising genes that enhance climate-resilience.
The basic genetic resources are already available: more than 770,000 unique seed samples are stored in 155 seed banks across 78 countries. These samples represent the full scope of known wheat genetic diversity, from modern varieties to ancient wild relatives and landraces developed at the dawn of agriculture.
Whatâs missing is funding to accelerate the search for specific genes and combinations that will fortify wheat against harsher conditions. This requires political will from key decision-makers and public interest. Nothing is more important than food security and the environmental legacy we leave to our children.
Harnessing the power of microorganisms
The genetic variation in seed banks is largely absent in modern wheat, which became genetically separate from other grass species 10,000 years ago and has undergone recent science-based breeding, constricting its diversity. Wheat needs its cousinsâ diversity to thrive in a changing climate.
Beyond climate resilience and disease resistance, wild wheat relatives offer another exciting avenue for environmental benefits: enhanced interactions with beneficial microorganisms. These ancient grasses have evolved intricate relationships with soil microbes largely absent in modern wheat.
Some wild wheat relatives can inhibit soil microbes that convert ammonium to nitrate. While both are usable nitrogen forms for plants, nitrate is more prone to loss through leaching or gaseous conversion. Slowing this process of conversion, called nitrification, has profound implications for sustainable agriculture, potentially mitigating greenhouse gas emissions, improving nitrogen-use efficiency, and decreasing synthetic fertilizer use.
As proof of concept, the first and only crop (so far) bred to promote microbiome interaction is wheat, using a gene from a wild relative (Leymus racemosus) to slow nitrification.
In addition, wild relatives often form more effective symbiotic relationships with beneficial soil fungi and bacteria, enhancing nutrient uptake, drought tolerance, and natural pest defenses. Reintroducing these traits could reduce chemical inputs while improving soil health and biodiversity.
The benefits extend beyond the field. Wheat varieties that use water and nutrients more efficiently could reduce agricultural runoff, protecting water bodies. Enhanced root systems could increase soil carbon sequestration, contributing to climate change mitigation.
By systematically exploring wild wheatâs microbial interaction traits, wheat varieties can be developed that not only withstand climate challenges but also actively contribute to environmental restoration.
This represents a paradigm shift from crop protection through chemicals to resilience through biological synergies. Indeed, even a fraction of the US $1.4 trillion spent annually on agrochemical crop protection could work wonders to fortify wheat against present and future challenges.
The path forward is clear: increased investment in researching wild wheat relatives can yield a new generation of wheat varieties that are not just climate-resilient, but also environmentally regenerative. This will be a crucial step towards sustainable food security in a changing world.
CIMMYT Director General Bram Govaertsâ visit to The University of Queensland (UQ) on September 27, 2024, reinforced a long-standing partnership aimed at tackling global food security and sustainability challenges. For over 50 years, CIMMYTâs collaboration with Australian researchers has advanced wheat breeding, contributing significantly to Australia’s agricultural resilience. The visit emphasized expanding research on key crops like sorghum, millets, and legumes, while promoting sustainable practices and climate resilience in agriculture. This collaboration continues to drive innovations that benefit not only Australia but also regions across the Indo-Pacific and Africa.
Perth, Australia â September 24, 2024 â Esteemed Professor Matthew Reynolds, Head of Wheat Physiology at CIMMYT, will deliver a pivotal plenary at the International Wheat Congress, centering on enhancing abiotic stress tolerance in wheat through the integration of complex traits by combining cutting-edge artificial intelligence with genetic diversity. This significant session promises to contribute valuable insights towards addressing the pressing global challenge of food security.
Pioneering Research to Future-Proof Wheat
Crop yield depends on a myriad of traits that interact across various dimensions such as growth stage, plant architecture, and growing environment. Until now, the complexity of these interactions has impeded precision breeding for traits like abiotic stress tolerance, input use efficiency, and yield potential. However, recent advancements in AI, remote sensing, and gene sequencing are making more deterministic breeding feasible.
In his presentation, Professor Reynolds will introduce a series of wiring diagrams representing trait interactions over time for wheat. These diagrams, based on empirical data and crop models, will serve as a framework for AI-assisted simulations to explore different breeding strategies. This innovative approach enables the genetic control of complex traits, allowing for more resilient wheat varieties that can withstand environmental stresses.
Collaborative Efforts Driving Innovation
This initiative is a collaboration between CIMMYT, the University of Florida, University of Queensland, and Wageningen University. The goal is to leverage advanced technologies to combine complex genetic traits in wheat, improving its tolerance to drought, heat, and poor soil conditions. This research holds significant promise for farmers worldwide, ensuring stable yields even under challenging growing conditions.
Impact and Benefits
Global Food Security: By developing high-yielding, climate-resilient wheat varieties, this research contributes to global food security, particularly benefiting farmers in South Asia and Africa.
Environmental Sustainability: Innovative research in Biological Nitrification Inhibition (BNI) addresses nitrogen pollution and enhances nitrogen use efficiency in wheat, contributing to environmental sustainability.
Disease Resistance: Advanced breeding techniques are being employed to develop wheat varieties resistant to devastating diseases like wheat rust, protecting yields and ensuring food security.
“By combining cutting-edge AI and genetic diversity, we are future-proofing wheat to thrive in challenging environments,” said Professor Matthew Reynolds.
The session will take place during Plenary Session 4 on Tuesday, September 24, 2024, from 8:30 am to 8:50 am at the Perth Convention and Exhibition Centre.
About CIMMYT
CIMMYT is a cutting-edge, non-profit, international organization dedicated to solving tomorrowâs problems today. By fostering improved production systems for maize, wheat, and other cereals through applied agricultural science, CIMMYT enhances the livelihoods and resilience of millions of resource-poor farmers while working towards a productive, inclusive, and resilient agrifood system within planetary boundaries.
A new study by CIMMYT, published in Global Change Biology, reveals that ancient wild relatives of wheat, which have adapted to extreme environmental conditions for millions of years, could be key to securing our future food supply. These wild varieties offer valuable genetic traits that can help modern wheat resist diseases, build climate resilience, and reduce agricultural emissions, making them essential for adapting to increasingly challenging growing conditions.
CIMMYT, Mexico, August 27, 2024 â Crop wild relatives that have survived changing climates for millions of years may provide the solution to adapting wheat, humanity’s most widely grown crop, to climate change. Two new studies led by the International Maize and Wheat Improvement Center (CIMMYT) reveal how tapping into this ancient genetic diversity can revolutionize wheat breeding and safeguard global food security.
As the weather becomes more erratic and extreme, wheat â providing 20% of all calories and protein globally and serving as the primary staple food for 1.5 billion people in the Global South â faces unprecedented threats. These include heat waves, delayed rains, flooding, and new pests and diseases.
“We’re at a critical juncture,” says Dr. Matthew Reynolds, co-author of both studies. “Our current breeding strategies have served us well, but they must now address more complex challenges posed by climate change.”
The research points to a vast, largely untapped reservoir of nearly 800,000 wheat seed samples stored in 155 genebanks worldwide. These include wild relatives and ancient, farmer-developed varieties that have withstood diverse environmental stresses over millennia. Although only a fraction of this genetic diversity has been utilized in modern crop breeding, it has already delivered significant benefits.
Photo CIMMYT: Wheat diversity spikes
Proven impacts of wild wheat genes
One of the studies, a review published today in Global Change Biology (GCB)*, documents the immense impact of wild relativesâ traits, including on environmental sustainability. It finds that the cultivation of disease-resistant wheat varieties has avoided the use of an estimated 1 billion liters of fungicide just since 2000.
âWithout transferring disease-resistant genes from wild relatives to wheat, fungicide use would have easily doubled, harming both human and environmental health,â says Dr. Susanne Dreisigacker, Molecular Breeder at CIMMYT and co-author of the review.
Sharing of new wheat breeding lines through the CIMMYT-led International Wheat Improvement Network, comprising hundreds of partners and testing sites around the world, increases productivity worth USD 11 billion of extra grain every year. The extra productivity has saved millions of hectares of forests and other natural ecosystems from cultivation.
The review highlights other key breakthroughs using wheat wild relatives, including:
Some experimental wheat lines incorporating wild traits show up to 20% more growth under heat and drought conditions compared to current varieties.
Genes from a wheat wild relative have generated the first crop ever bred to interact with soil microbes, reducing the production of nitrous oxide, a potent greenhouse gas, and enabling the plants to use nitrogen more efficiently.
New, high-yielding cultivars in Afghanistan, Egypt and Pakistan were developed using wild genes and have been released as they are more robust to the warming climate.
âBreeding the first beneficial interaction with the soil microbiome â in this case biological nitrification inhibition, or BNI-wheat â is a landmark achievement by CIMMYT and JIRCAS, opening up a whole new spectrum of opportunities to boost cropping systemsâ resilience and reduce environmental footprints,â says Victor Kommerell, co-author of the GCB review, and Director of CropSustaiN, a new research initiative to determine the global climate mitigation and food security potential of BNI wheat.
The second study in Nature Climate Change* showcases the urgent need to scale-up exploration and use of genetic diversity for improved climate resilience. Among the traits needed are deeper, more extensive root systems for better water and nutrient access; photosynthesis that performs well across a wider temperature range; better heat tolerance in reproductive processes; and improved survival during delayed rains or temporary flooding.
âTapping into the complex climate-resilient traits so urgently needed today requires both access to greater genetic diversity and a paradigm shift in breeding approaches,â explains co-author of the GCB review, Dr. Julie King of Nottingham University.
Modern crop breeding has focused on a relatively narrow pool of âstar athletesâ: elite crop varieties that are already high performers and that have known, predictable genetics. In contrast, the genetic diversity of wild wheat relatives offers complex climate-resilient traits â but their use has been more time-consuming, costly and riskier than traditional breeding approaches with elite varieties. Now, new technologies have changed that equation.
Making the impossible possible
“We have the tools to quickly explore genetic diversity that was previously inaccessible to breeders,” explains Dr. Benjamin Kilian, co-author of the review and coordinator of the Crop Trustâs Biodiversity for Opportunities, Livelihoods and Development (BOLD) project that supports conservation and use of crop diversity globally.
Among these tools are next-generation gene sequencing, big-data analytics, and remote sensing technologies, including satellite imagery. The latter allows researchers to routinely monitor traits like plant growth rate or disease resistance at unlimited numbers of sites globally.
However, realizing the full potential of these genetic resources will require global cooperation. “The most significant impacts will come through widespread sharing of genetic resources and technologies,” says Dr. Kilian.
New technologies allow crop researchers to precisely identify and transfer beneficial traits from wild relatives, making what has been seen as a risky, time-consuming process into a targeted, efficient strategy for climate-proofing crops. âSatellite technology turns the planet into a laboratory,â says Dr. Reynolds, âCombined with artificial intelligence to super-charge crop-breeding simulations, we can identify whole new solutions for climate resilience.â
This research, which also applies to any crop with surviving wild relatives, promises to enhance global food security and make cropping systems more environmentally sustainable. Developing more resilient and efficient wheat varieties will help feed a global population while reducing agriculture’s environmental footprint.
Photo CIMMYT: Wheat diversity spikes
Study information and links
*Wheat genetic resources have avoided disease pandemics, improved food security, and reduced environmental footprints: A review of historical impacts and future opportunities. King J, Dreisigacker S, Reynolds M et al., 2024. Global Change Biology (Study available under embargo upon request)
*New wheat breeding paradigms for a warming climate. Xiong, W., Reynolds, M.P., Montes, C. et al. Nat. Clim. Chang. (2024). Â https://doi.org/10.1038/s41558-024-02069-0
Note to editors
About CIMMYT
Headquartered in Mexico, the International Maize and Wheat Improvement Center (known by its Spanish acronym, CIMMYT) is a not-for-profit agriculture research and training organization. The center works to reduce poverty and hunger by sustainably increasing the productivity of maize and wheat cropping systems in the developing world. Learn more at staging.cimmyt.org
About the Crop Trust
The Crop Trust is an international organization working to conserve crop diversity and protect global food and nutrition security. At the core of the Crop Trust is an endowment fund dedicated to providing guaranteed long-term financial support to key genebanks worldwide. The Crop Trust supports the Svalbard Global Seed Vault and coordinates large-scale projects worldwide to secure crop diversity and make it available for use, globally forever and for the benefit of everyone. The Crop Trust is recognized as an essential element of the funding strategy of the International Treaty on Plant Genetic Resources for Food and Agriculture. Learn more at www.croptrust.org
About the Biodiversity for Opportunities, Livelihoods and Development (BOLD) Project
BOLD is a 10-year project to strengthen food and nutrition security worldwide by supporting the conservation and use of crop diversity. The project works with national genebanks, pre-breeding and seed system partners globally. Funded by the Government of Norway, BOLD is led by the Crop Trust in partnership with the Norwegian University of Life Sciences and the International Plant Treaty.
The Novo Nordisk Foundation and CIMMYT have launched the 4-year CropSustaiN initiative to determine the global potential of wheat that is significantly better at using nitrogen, thanks to Biological Nitrification Inhibition (BNI)âand to accelerate breeding and farmer access to BNI wheat varieties.
With a budget of US$ 21 million, CropSustaiN addresses the pressing challenges of nitrogen pollution and inefficient fertilizer use, which contribute to greenhouse gas (GHG) emissions and ecological degradation. Currently, no other seed or agronomic practice-based solution matches BNI cropsâ mitigation impact potential. Growing BNI crops can complement other climate mitigation measures.
The challenge
Agriculture is at the heart of both food and nutrition security and environmental sustainability. The sector contributes ca. 10-12% of global GHG emissions, including 80% of the highly potent nitrous oxide (N2O) emissions. Fertilizer use contributes to such N losses, because plants take up about 50%, the remainder being lost. Wheat is the world’s largest âcropâ consumer of nitrogen-based fertilizerâa relatively nitrogen-inefficient cerealâat the same time providing affordable calories to billions of resource-poor people and ca. 20% of globally consumed protein. CropSustaiN targets this nexus of productivity and planetary boundary impact by verifying and thus de-risking the needed breeding, agronomic, and social innovations.
A solution: BNI-wheat
BNI is a natural ability of certain plant species to release metabolites from their roots into the soil. They influence the nitrogen-transforming activity of nitrifying bacteria, slowing down the conversion of ammonium to nitrate in the soil. This preserves soil ammonium levels for a longer time, providing plants with a more sustained source of available nitrogen and making them more nitrogen-use efficient (nitrogen plant use efficiency). As a result, BNI helps reduce the release of N2O gas emissions and nitrate leaching to the surrounding ecosystem.
A research breakthrough in 2021, led by the Japan International Research Center of Agricultural Sciences (JIRCAS) in collaboration with CIMMYT, demonstrated that the BNI trait can be transferred from a wheat wild relative to a modern wheat variety by conventional breeding. BNI wheat can be made available to farmers worldwide.
Growing BNI wheat could reduce nitrogen fertilizer usage by 15-20%, depending on regional farming conditions, without sacrificing yield or quality.
Incorporating BNI into additional crops would reduce usage further. Farmers can get the same yield with less external inputs.
Other BNI-crops
CropSustaiN will work on spring and winter wheats. Rice, maize, barley, and sorghum also have BNI potential. CropSustaiN will build the knowledge base and share with scientists working on other crops and agronomic approaches.
Objectives and outcomes
This high risk, high reward mission aims to:
Verify the global, on-farm potential of BNI-wheat through field trial research and breeding.
Build the partnerships and pathways to meet farmer demand for BNI-wheat seeds.
Work with stakeholders on policy change that enables BNI crops production and markets
Success will be measured by determining nitrogen pollution reduction levels under different soil nitrogen environments and management conditions on research stations, documenting crop performance and safety, breeding for BNI spring and winter wheats for a wide range of geographies, and gauging farmer needs, interest, and future demand.
Wheat spikes against the sky at CIMMYT’s El BatĂĄn, Mexico headquarters. (Photo: H. Hernandez Lira/CIMMYT)
A collaborative effort
CIMMYT is the lead implementer of Novo Nordisk Foundationâs mission funding. CropSustaiNâs interdisciplinary, intersectoral, systems approach relies on building partnerships and knowledge-sharing within and outside this research initiative. 45+ partners are engaged in CropSustaiN.
The potential GHG emissions reduction from deploying BNI-wheat is estimated to be 0.016-0.19 gigatonnes of CO2-equivalent emissions per year, reducing 0.4-6% of total global N2O emissions annually, plus a lowering of nitrate pollution.
Impact on climate change mitigation and Nationally Determined Contributions (NDCs)
The assumption is that BNI wheat is grown in all major wheat-growing areas and that farmers will practice a behavioral shift towards lower fertilizer use and higher fertilizer use efficiency. That could lead to ca. a reduction of 17 megatons per year globally. This can help nations achieve their NDCs under the Paris Agreement.
International public goods, governance, and management
CIMMYT and the Foundation are committed to open access and the dissemination of seeds, research data, and results as international public goods. The governance and management model reinforces a commitment to equitable global access to CropSustaiN outputs, emphasized in partnership agreements and management of intellectual property.
Invitation to join the mission
The CropSustaiN initiative is a bold step towards agricultural transformation. You are invited to become a partner. You can contribute to the mission with advice, by sharing methods, research data and results, or becoming a co-founder.
Please contact CropSustaiN Mission Director, Victor Kommerell, at v.kommerell@cgiar.org or Novo Nordisk Foundationâs Senior Scientific Manager, Jeremy A. Daniel, at jad@novo.dk.
