The war in Ukraine, coupled with weather-related disruptions in the worldâs major grain-producing regions, could unleash unbearable waves of displacement, humanitarian consequences, civil unrest, major financial losses worldwide, and geopolitical fragility, says Bram Govaerts, DG of CIMMYT, in a Boston Globe op-ed.
The impacts of the Ukraine crisis are likely to reverberate over months, if not years, to come. If the reductions in wheat exports from Russia and Ukraine are as severe as anticipated, global supplies of wheat will be seriously constrained. If a major reduction in fertilizer exports comes to pass, the resulting drop in global productivity will tighten global markets for wheat, other grains and alternate food sources â leaving vulnerable people all over the world facing higher food prices, hunger and malnutrition.
These massive disruptions will erode modest progress made toward gender equality, biodiversity conservation and dietary diversification. The severe impact of this single shock shows the underlying fragility and complexity of our agri-food systems. Climate change will bring many more.
The world must take essential actions to mitigate food shocks, stabilize local wheat supplies and transition toward agri-food system resilience, from the current efficiency-driven model. We call for large and sustained agricultural research investments as a foundational element of any viable, food-secure future.
From chronic challenges to food crisis conditions
Global wheat production for export is geographically concentrated, placing inherent vulnerabilities on the global system. Dominance of the wheat export trade by a relatively small number of countries makes sense under an efficiency paradigm, but it opens the door to price spikes and food-related crises. At the same time, biophysical vulnerability of major global breadbaskets is on the rise as drought and other weather extremes increase volatility in cereal yields, exports and prices.
Russia and Ukraine produce 28% of the worldâs total wheat exports and Russia is a globally important source of fuel and fertilizer. With over 2.5 billion people worldwide consuming wheat-based products and wheat futures at their highest levels since 2012, disrupted exports from Russia and Ukraine would usher in substantial new pressures on global wheat markets and tremendous risks for vulnerable populations around the world.
Dependence on wheat imports from Russia and Ukraine imperils food security in lower- and middle-income countries in North Africa and the Middle East (Algeria, Egypt, Libya, Morocco, Yemen), the Mediterranean (Azerbaijan, Turkey), sub-Saharan Africa (Nigeria, Sudan), Southern Asia (Bangladesh, Pakistan) and throughout Southeast Asia. Globally elevated food prices will hit hardest in those countries already struggling with food insecurity.
Layered onto the existing concentration of wheat-exporting countries and the climate-induced vulnerabilities in essential global breadbaskets, the crisis in Ukraine and trade sanctions on Russia are triggering a level of volatility that could easily overwhelm existing mitigation mechanisms. We may well see a range of negative effects over the short, medium and long term, including:
Stabilize while building resilience
With these multi-layered challenges in view, we propose essential actions to mitigate near-term food security crises, to stabilize wheat supply and to concurrently transition toward agri-food system resilience.
Without doubt, the world’s top priority must be to mitigate food security crises at our doorstep. This will involve boosting wheat production through expanded acreage (e.g. in high-performing systems in the Global North) and closing yield gaps (e.g. improved management and value chains of rainfed, wheat-based systems in the Global South) using policy incentives such as price guarantees and subsidized agricultural inputs. Short-term food insecurity can also be addressed through demand-side management (e.g. market controls to conserve grain stocks for human consumption; use of lower-cost flour blends) and de-risking alternative sourcing (e.g. trade agreements).
As these actions are taken, a range of strategies can simultaneously drive toward more resilient wheat supply at local to global scales. Well-functioning seed systems, demand-driven agronomic support and other elements of wheat self-reliance can be encouraged through shifts in local policy, regulatory and sectoral contexts. Enhanced monitoring capacity can track spatial patterns in wheat cropping, including expansion into areas where comparative advantage for wheat production (e.g. agro-ecological suitability; supporting infrastructure) has been identified in rural development frameworks and national plans (e.g. as a double crop in Ethiopian midlands). In addition to enabling yield forecasts, surveillance systems are critical to phytosanitary control of geographically restricted pathogens under altered wheat trade routes.
Yet, these steps to mitigate food shocks and stabilize local wheat supplies will not adequately protect the world from climate-related biophysical risks to food and nutritional security. In parallel, a transition toward agri-food system resilience requires transformative investments in agricultural diversification, sustainable natural resource management and low-greenhouse-gas agroecosystems, as well as meaningful actions toward achieving gender equality, nutritional sufficiency and livelihood security.
Sustained research & development for a food-secure future
None of the critical actions described above are guaranteed given the oscillating global investment in agricultural research. Enabled by decades of agricultural research, the world has managed to constrain the number and severity of food security crises through major gains in agricultural productivity.
The International Maize and Wheat Improvement Center (CIMMYT), the global international wheat research Center of the CGIAR, has been working tirelessly to maintain wheat harvests around the world in the face of mounting disease pressures and climate challenges. The estimated benefit-cost ratio for wheat improvement research ranges from 73:1 to 103:1. Yet, research funding only rises when food crises occur, revealing the globalized risks of our highly interconnected agri-food systems, and then tapers as memories fade.
With limited resources, scientists around the world are attacking the complex challenge of increasing agricultural yields and ensuring stable, equitable food supplies. Receiving only about 2% of international agricultural research funding over time, CIMMYT and the entire CGIAR have had limited ability to develop the long-term research capabilities that could mitigate or prevent short-term emergencies with medium- to long-term effects.
Responding to the mounting pressures on deeply complex agri-food systems requires integrative solutions that allow farmers and other agri-food stakeholders to mitigate and withstand shocks and to achieve viable livelihoods. Knowledge and technology needs are extensive across production systems (e.g. wheat-legume intercropping; cereals-focused agroecological interventions), value chains (e.g. context-appropriate seed systems; nutrition enhancement through flour blending), monitoring systems (e.g. genomics-based surveillance), and social dimensions (e.g. gender implications of new production and consumption strategies; policy interventions).
Generating such solutions depends on robust, multidisciplinary and transparent research capabilities that fuel the transition to agri-food system resilience. Robust international investment in resilient agricultural systems is an essential condition for national security, global peace and prosperity.
Read the full article (pre-print):
Another food crisis? The Ukraine conflict, global wheat supply and food security
In an analysis piece on Nature, the director of CIMMYT’s Global Wheat Program, Alison Bentley, highlights the expected income of the Russia-Ukraine war on food security.
In low-income nations, the ability of governments to continue to subsidize bread will be strained; the knock-on effects on overall government spending and provision of public services will reach far beyond wheat. The last time wheat prices increased sharply, in 2008, it precipitated food riots from Burkina Faso to Bangladesh.
An unprecedented level of international political and economic action is now required to safeguard the immediate food supply of those who are already vulnerable, including in the global south. At the same time, a range of agricultural interventions must be deployed to make the supply of wheat more resilient in the years ahead.
Read the full analysis:
Broken bread â avert global wheat crisis caused by invasion of Ukraine
The newly released CGIAR Research Program on Wheat 2021 Technical Annual Report highlights joint achievements in making wheat more affordable, nutritious and available for consumers and producers worldwide.
Over the course of ten years, WHEAT worked with hundreds of research and development partners worldwide to release high-yielding, disease-resistant, nutritious and climate-resilient wheat varieties, and efficient, sustainable wheat-based cropping systems.
This final report from 2021 shares important research on staple cerealsâ role in global efforts towards food security, the number and distribution of wheat farms, the expected impact of climate change on wheat productivity, nitrogen-in-agriculture research, nutrition, and the most critical, immediate effects of COVID-19 on food systems, and more.
With its national partners, WHEAT released 70 new CGIAR-derived wheat varieties to farmers in 13 countries in 2021, and developed 18 innovations in the areas of genetics, biophysics, farm management, research and communication methods, or social sciences.
When wheat prices rise, so do global food prices, along with conflict, inequality and instability. Over the past two decades, the world has witnessed multiple crises erupt over the social and political instability caused by rising costs for staple cereals. The global food crisis that impacted many parts of the world in 2007â2008 was a response, in part, to the prices for wheat and rice which had increased 130% and 70%, respectively, compared to the year before. More recently, spikes in grain prices catalyzed the 2011 Arab Spring.
With the ongoing conflict in Ukraine and the resulting longer-term disruptions of the countryâs rural economy, there is potential for another round of turmoil linked to prices for staple cereals.
Ukraine is a breadbasket for the world, with 57% of its land area arable for agriculture. Wheat production in the country increased roughly 10%, on average, between 2000 and 2020. In 2022, Ukraine ranked as the fifth largest wheat exporter globally, exporting $3.59 billion of wheat.
Today, global wheat prices are at their highest levels since 2012: $9 per bushel, based on data from the Chicago Board of Trade.
Wheat is a staple crop, essential to food security. It is consumed by over 2.5 billion people worldwide, including large proportions of the populations of many food-insecure regions in the world. Many of the wheat-consuming countries in these regions are far from wheat self-sufficient, relying on global imports to meet demand. This causes significant vulnerability in food supply and increases associated humanitarian risks. In 2019, important quantities of Ukrainian wheat were exported to low- and middle-income countries in North Africa and the Middle East. Although the impacts of current price increases are anticipated to be short-term, they are likely to be inequitably felt, as not all buyers are able to pay higher prices.
There are over 6 million hectares of wheat planted in farmersâ fields across Ukraine that will be due for harvest in June and July of 2022. The length and depth of the current crisis has potential implications for the fate of this in-field crop, and for its subsequent harvest and global distribution. Likewise, sanctions and trading restrictions on Russia, the worldâs largest wheat exporter â exporting $7.92 billion of wheat in 2020 â are likely to place added pressure on international wheat markets. This comes at a time of rising costs in agriculture, including the soaring price of nitrogen fertilizer and increasing fuel and supply chain costs. The gap between supply and demand is also becoming wider with climatic instability â such as drought conditions â hitting both domestic production and export stocks in several countries.
Rising prices for staple cereals have historically led to instability, particularly in fragile regions where food security is low. The impacts of current high wheat prices are likely to be felt most significantly by populations in the Global South who rely on wheat imports.
The potential humanitarian crisis beyond the borders of the current conflict needs to be addressed to avoid deepening global divisions in equality of access to food. In the case of wheat, long-term solutions will require much higher levels of investment, coordination and cooperation between governments, development organizations and agro-industry. Without doubt, part of the solution lies in increasing wheat productivity and profitability in food-insecure regions where wheat has traditionally been grown, as well as supporting the expansion of wheat production into climatically suitable areas in countries which have traditionally relied on imports to meet local demand.
Today the Weed Science Society of America (WSSA) announced the Honorary Member award for Ram Kanwar Malik, senior scientist at the International Maize and Wheat Improvement Center (CIMMYT). This award is given every year to a person who has made outstanding contributions to weed science âthrough their research, teaching, publishing and outreach.â
Malik’s early engagement in agricultural sustainability led to initiatives exploring herbicide resistance evolution and management, zero tillage, and other resource-conservation technologies. At the Cereal Systems Initiative for South Asia (CSISA) â a regional project led by CIMMYT â Malik and his colleagues helped promote the practice of early wheat sowing to beat terminal heat stress, resulting in increased wheat yield in Indiaâs eastern Indo-Gangetic Plains.
“WSSA’s Honorary Member award is one of the highest recognitions bestowed by the Weed Science Society of America,â said Krishna Reddy, Chair of the WSSA 2022 Award Committee. â[The] Honorary Member is selected for meritorious service to weed science, among non-members from North America or any weed scientist from other countries. Only one person per year is awarded this membership. Dr. Malik’s significant research in weed science and his collaborative effort to deliver solutions for farmers in developing countries like India is inspirational.”
The award was presented virtually at the 2022 annual meeting of WSSA, held in Vancouver, Canada.
Transforming riceâwheat systems
Malik has worked extensively in the Indo-Gangetic Plains, leading many initiatives and innovations over the years, in collaboration with national and international partners. The WSSA award highlights Malik’s inspiring work in tackling herbicide resistance problems, first reported in India by his team in 1993. Malik was instrumental in developing a management solution for herbicide-resistant Phalaris minor, a pernicious weed in wheat crops. The integrated weed management system he helped develop raised wheat yield capacity significantly for farmers in the Indo-Gangetic Plains.
“The WSSA Honorary Member award reiterates the importance of agronomic management for sustained weed control strategies across cropping systems,” Malik said. “CIMMYT and partners, including the Australian Centre for International Agricultural Research (ACIAR), were the first to introduce zero tillage in wheat as part of a strategy to manage weed resistance problems in India. It is an honor that WSSA has recognized this collective work of ours,” he acknowledged.
Malik has devoted more than thirty years to transforming agricultural systems in the Indo-Gangetic Plains, working closely with farmers and partners, and building the capacity of national agricultural and research extension systems. he is a firm believer in farmers’ participation: “Large-scale adoption of sustainable agricultural practices is possible when we work together to leverage technologies which are mutually agreed by partners and meet farmers’ needs.”
Malik is a fellow of the Indian Society of Agronomy and the Indian Society of Weed Science (ISWS), which granted him the Lifetime Achievement Award. He has also received the Outstanding Achievement Award from the International Weed Science Society (IWSS) and the 2015 Derek Tribe Award from the Crawford Fund.
He remains passionate about and invested in changing the lives of farmers through better-bet agronomy and by leading innovative research at CIMMYT.
About the Weed Science Society of America (WSSA)
Founded in 1956, WSSA is a nonprofit scientific society that encourages and promotes the development of knowledge concerning weeds and their impact on the environment.
Emerging in the last 120 years, science-based plant breeding begins by creating novel diversity from which useful new varieties can be identified or formed. The most common approach is making targeted crosses between parents with complementary, desirable traits. This is followed by selection among the resulting plants to obtain improved types that combine desired traits and performance. A less common approach is to expose plant tissues to chemicals or radiation that stimulate random mutations of the type that occur in nature, creating diversity and driving natural selection and evolution.
Determined by farmers and consumer markets, the target traits for plant breeding can include improved grain and fruit yield, resistance to major diseases and pests, better nutritional quality, ease of processing, and tolerance to environmental stresses such as drought, heat, acid soils, flooded fields and infertile soils. Most traits are genetically complex â that is, they are controlled by many genes and gene interactions â so breeders must intercross and select among hundreds of thousands of plants over generations to develop and choose the best.
Plant breeding over the last 100 years has fostered food and nutritional security for expanding populations, adapted crops to changing climates, and helped to alleviate poverty. Together with better farming practices, improved crop varieties can help to reduce environmental degradation and to mitigate climate change from agriculture.
Plant breeding began around 10,000 years ago, when humans undertook the domestication of ancestral food crop species. Over the ensuing millennia, farmers selected and re-sowed seed from the best grains, fruits or plants they harvested, genetically modifying the species for human use.
Modern, science-based plant breeding is a focused, systematic and swifter version of that process. It has been applied to all crops, among them maize, wheat, rice, potatoes, beans, cassava and horticulture crops, as well as to fruit trees, sugarcane, oil palm, cotton, farm animals and other species.
With modern breeding, specialists began collecting and preserving crop diversity, including farmer-selected heirloom varieties, improved varieties and the cropsâ undomesticated relatives. Today hundreds of thousands of unique samples of diverse crop types, in the form of seeds and cuttings, are meticulously preserved as living catalogs in dozens of publicly-administered âbanks.â
The International Maize and Wheat Improvement Center (CIMMYT) manages a germplasm bank containing more than 180,000 unique maize- and wheat-related seed samples, and the Svalbard Global Seed Vault on the Norwegian island of Spitsbergen preserves back-up copies of nearly a million collections from CIMMYT and other banks.
Through genetic analyses or growing seed samples, scientists comb such collections to find useful traits. Data and seed samples from publicly-funded initiatives of this type are shared among breeders and other researchers worldwide. The complete DNA sequences of several food crops, including rice, maize, and wheat, are now available and greatly assist scientists to identify novel, useful diversity.
Much crop breeding is international. From its own breeding programs, CIMMYT sends half a million seed packages each year to some 800 partners, including public research institutions and private companies in 100 countries, for breeding, genetic analyses and other research.
Early in the 20th century, plant breeders began to apply the discoveries of Gregor Mendel, a 19th-century mathematician and biologist, regarding genetic variation and heredity. They also began to take advantage of heterosis, commonly known as hybrid vigor, whereby progeny of crosses between genetically different lines will turn out stronger or more productive than their parents.
Modern statistical methods to analyze experimental data have helped breeders to understand differences in the performance of breeding offspring; particularly, how to distinguish genetic variation, which is heritable, from environmental influences on how parental traits are expressed in successive generations of plants.
Since the 1990s, geneticists and breeders have used molecular (DNA-based) markers. These are specific regions of the plantâs genome that are linked to a gene influencing a desired trait. Markers can also be used to obtain a DNA âfingerprintâ of a variety, to develop detailed genetic maps and to sequence crop plant genomes. Many applications of molecular markers are used in plant breeding to select progenies of breeding crosses featuring the greatest number of desired traits from their parents.
Plant breeders normally prefer to work with âeliteâ populations that have already undergone breeding and thus feature high concentrations of useful genes and fewer undesirable ones, but scientists also introduce non-elite diversity into breeding populations to boost their resilience and address threats such as new fungi or viruses that attack crops.
Transgenics are products of one genetic engineering technology, in which a gene from one species is inserted in another. A great advantage of the technology for crop breeding is that it introduces the desired gene alone, in contrast to conventional breeding crosses, where many undesired genes accompany the target gene and can reduce yield or other valuable traits. Transgenics have been used since the 1990s to implant traits such as pest resistance, herbicide tolerance, or improved nutritional value. Transgenic crop varieties are grown on more than 190 million hectares worldwide and have increased harvests, raised farmersâ income and reduced the use of pesticides. Complex regulatory requirements to manage their potential health or environmental risks, as well as consumer concerns about such risks and the fair sharing of benefits, make transgenic crop varieties difficult and expensive to deploy.
Genome editing or gene editing techniques allow precise modification of specific DNA sequences, making it possible to enhance, diminish or turn off the expression of genes and to convert them to more favorable versions. Gene editing is used primarily to produce non-transgenic plants like those that arise through natural mutations. The approach can be used to improve plant traits that are controlled by single or small numbers of genes, such as resistance to diseases and better grain quality or nutrition. Whether and how to regulate gene edited crops is still being defined in many countries.
In the early 1990s, a CIMMYT methodology led to improved maize varieties that tolerate moderate drought conditions around flowering time in tropical, rainfed environments, besides featuring other valuable agronomic and resilience traits. By 2015, almost half the maize-producing area in 18 countries of sub-Saharan Africa â a region where the crop provides almost a third of human calories but where 65% of maize lands face at least occasional drought â was sown to varieties from this breeding research, in partnership with the International Institute of Tropical Agriculture (IITA). The estimated yearly benefits are as high as $1 billion.
Intensive breeding for resistance to Maize Lethal Necrosis (MLN), a viral disease that appeared in eastern Africa in 2011 and quickly spread to attack maize crops across the continent, allowed the release by 2017 of 18 MLN-resistant maize hybrids.
Improved wheat varieties developed using breeding lines from CIMMYT or the International Centre for Agricultural Research in the Dry Areas (ICARDA) cover more than 100 million hectares, nearly two-thirds of the area sown to improved wheat worldwide, with benefits in added grain that range from $2.8 to 3.8 billion each year.
Breeding for resistance to devastating crop diseases and pests has saved billions of dollars in crop losses and reduced the use of costly and potentially harmful pesticides. A 2004 study showed that investments since the early 1970s in breeding for resistance in wheat to the fungal disease leaf rust had provided benefits in added grain worth 5.36 billion 1990 US dollars. Global research to control wheat stem rust disease saves wheat farmers the equivalent of at least $1.12 billion each year.
Crosses of wheat with related crops (rye) or even wild grasses â the latter known as wide crosses â have greatly improved the hardiness and productivity of wheat. For example, an estimated one-fifth of the elite wheat breeding lines in CIMMYT international yield trials features genes from Aegilops tauschii, commonly known as âgoat grass,â that boost their resilience and provide other valuable traits to protect yield.
Biofortification â breeding to develop nutritionally enriched crops â has resulted in more than 60 maize and wheat varieties whose grain offers improved protein quality or enhanced levels of micro-nutrients such as zinc and provitamin A. Biofortified maize and wheat varieties have benefited smallholder farm families and consumers in more than 20 countries across sub-Saharan Africa, Asia, and Latin America. Consumption of provitamin-A-enhanced maize or sweet potato has been shown to reduce chronic vitamin A deficiencies in children in eastern and southern Africa. In India, farmers have grown a high-yielding sorghum variety with enhanced grain levels of iron and zinc since 2018 and use of iron-biofortified pearl millet has improved nutrition among vulnerable communities.
Crop breeders have been laying the groundwork to pursue genomic selection. This approach takes advantage of low-cost, genome-wide molecular markers to analyze large populations and allow scientists to predict the value of particular breeding lines and crosses to speed gains, especially for improving genetically complex traits.
Speed breeding uses artificially-extended daylength, controlled temperatures, genomic selection, data science, artificial intelligence tools and advanced technology for recording plant information â also called phenotyping â to make breeding faster and more efficient. A CIMMYT speed breeding facility for wheat features a screenhouse with specialized lighting, controlled temperatures and other special fixings that will allow four crop cycles â or generations â to be grown per year, in place of only two cycles with normal field trials. Speed breeding facilities will accelerate the development of productive and robust varieties by crop research programs worldwide.
Data analysis and management. Growing and evaluating hundreds of thousands of plants in diverse trials across multiple sites each season generates enormous volumes of data that breeders must examine, integrate, and co-analyze to inform decisions, especially about which lines to cross and which populations to discard or move forward. New informatics tools such as the Enterprise Breeding System will help scientists to manage, analyze and apply big data from genomics, field and lab studies.
Following the leaders. Driven by competition and the quest for profits, private companies that market seed and other farm products are generally on the cutting edge of breeding innovations. The CGIARâs Excellence in Breeding (EiB) initiative is helping crop breeding programs that serve farmers in low- and middle-income countries to adopt appropriate best practices from private companies, including molecular marker-based approaches, strategic mechanization, digitization and use of big data to drive decision making. Modern plant breeding begins by ensuring that the new varieties produced are in line with what farmers and consumers want and need.
Cover photo: CIMMYT experimental station in Toluca, Mexico. Located in a valley at 2,630 meters above sea level with a cool and humid climate, it is the ideal location for selecting wheat materials resistant to foliar diseases, such as wheat rust. Conventional plant breeding involves selection among hundreds of thousands of plants from crosses over many generations, and requires extensive and costly field, screenhouse and lab facilities. (Photo: Alfonso Cortés/CIMMYT)
Five international wheat research teams have been awarded grants for their proposals to boost climate resilience in wheat through discovery and development of new breeding technologies, screening tools and novel traits.
Wheat is one of the worldâs most important staple crops, accounting for about 20% of all human calories and protein and is increasingly threatened by the impacts of climate change. Experts around the world are working on ways to strengthen the crop in the face of increasing heat and drought conditions.
The proposals were submitted in response to a call by the Heat and Drought Wheat Improvement Consortium (HeDWIC), led by the International Maize and Wheat Improvement Center (CIMMYT) and global partners, made in 2021.
The grants were made possible by co-funding from the Foundation for Food & Agriculture Research (FFAR) and in-kind contributions from awardees as part of a project which brings together the latest research from scientists across the globe to deliver climate resilient wheat to farmers as quickly as possible.
Cutting-edge wheat research
Owen Atkin, from the Centre for Entrepreneurial Agri-Technology at the Australian National University, leads the awarded project âDiscovering thermally stable wheat through exploration of leaf respiration in combination with photosystem II capacity and heat tolerance.â
âThe ratio of dark respiration to light and CO2 saturated photosynthesis is a clear indicator of the respiratory efficiency of a plant,â Atkin said. âWe will measure and couple this indicator of respiratory efficiency to the leaf hyperspectral signature of field grown wheat exposed to heat and drought. The outcome could be a powerful tool which is capable of screening for wheat lines that are more productive when challenged with drought and heatwave.â
Hannah M. Schneider, of Wageningen University & Research, leads the awarded project examining the use of a novel root trait called Multiseriate Cortical Sclerenchyma to increase drought-tolerance in wheat.
âDrought is a primary limitation to global crop production worldwide. The presence of small outer cortical cells with thick, lignified cell walls (MCS: Multiseriate Cortical Sclerenchyma) is a novel root trait that has utility in drought environments,â Schneider said. âThe overall objective of this project is to evaluate and develop this trait as a tool to improve drought resistance in wheat and in other crops.â
John Foulkes, of the University of Nottingham, leads an awarded project titled âIdentifying spike hormone traits and molecular markers for improved heat and drought tolerance in wheat.â
âThe project aims to boost climate-resilience of grain set in wheat by identifying hormone signals to the spike that buffer grain set against extreme weather, with a focus on cytokinin, ABA and ethylene responses,â Foulkes said. âThis will provide novel phenotyping screens and germplasm to breeders, and lay the ground-work for genetic analysis and marker development.â
Erik Murchie, from the University of Nottingham, leads an awarded project to explore new ways of determining genetic variation in heat-induced growth inhibition in wheat.
âHigh temperature events as part of climate change increasingly limit crop growth and yield by disrupting metabolic and developmental processes. This project will develop rapid methods for screening growth and physiological processes during heat waves, generating new genetic resources for wheat,â Murchie said.
Eric Ober of the National Institute of Agricultural Botany in the UK, leads the awarded project âTargeted selection for thermotolerant isoforms of starch synthase.â
âWheat remains a predominant source of calories and is fundamental to regional food security around the world. It is urgent that breeders are equipped to produce new varieties with increased tolerance to heat and drought, two stresses that commonly occur together, limiting grain production. The formation and filling of grain depends on the synthesis of starch, but a key enzyme in the pathway, starch synthase, is particularly sensitive to temperatures over 25°C. However, there exist forms of this enzyme that exhibit greater thermotolerance than that found in most current wheat varieties,â Ober said. âThis project aims to develop a simple assay to screen diverse germplasm for sources of more heat-resistant forms of starch synthase that could be bred into new wheat varieties in the future.â
Breakthroughs from these projects are expected to benefit other crops, not just wheat. Other benefits of the projects include closer interaction between scientists and breeders and capacity building of younger scientists.
India has conferred posthumously upon Sanjaya Rajaram, 2014 World Food Prize laureate and former wheat breeder and Director of the Wheat Program at the International Maize and Wheat Improvement Center (CIMMYT), its prestigious 2022 Padma Bhushan Award in “Science and Engineering” in recognition of “distinguished service of high order.”
Among the most successful crop breeders in history, Rajaram, who passed away in 2021, personally oversaw the development of nearly 500 high-yielding and disease-resistant wheat varieties that were grown on at least 58 million hectares in over 50 countries, increasing global wheat production by more than 200 million tons and especially benefiting hundreds of millions of the resource-poor whose diets and livelihoods depend on this critical crop. In India and the neighboring South Asian nations of Bangladesh, Nepal, and Pakistan, inhabitants consume more than 120 million tons of wheat and wheat-based foods each year.
âDr. Rajaram was a true titan of wheat breeding and an inspiration for young researchers, training and mentoring more than 700 scientists from developing countries worldwide,â said Bram Govaerts, CIMMYT director general. âHe was also a complete gentleman, comporting himself with modesty and grace despite his many honors and accomplishments; his first priority was helping and crediting others. Rajaram is an example today for all of us to keep working with the final stakeholder â the farmer â in mind.â
The rise from rural beginnings
Born on a small farm in District Varanasi, Uttar Pradesh, India, in 1943, Rajaram studied genetics and plant breeding at the Indian Agricultural Research Institute in New Delhi. After receiving his Ph.D. from the University of Sydney, he joined CIMMYT in 1969, working as a wheat breeder alongside Nobel Prize Laureate and CIMMYT scientist Norman Borlaug in Mexico. Recognizing his talent and initiative, Borlaug appointed Rajaram as head of CIMMYTâs wheat breeding program at just 29 years of age.
The Padma Bhushan Award was announced by President Ram Nath Kovind of India on the countryâs Republic Day, January 26. In 2015, Rajaram received the Pravasi Bharatiya Samman award, the highest honor conferred on Indians overseas. In 2001 he accepted the Padma Shri award from the government of India and, in 1998, the Friendship Award from the government of China.
Though a plant breeder and scientist by profession, Rajaram used the platform of his 2014 World Food Prize to promote an expansive, integrated vision for agricultural development. âIf we want to make a change, research wonât do it alone; we need to work directly with farmers and to train young agronomists, ensuring they have a broad vision to address the problems in farmersâ fields,â Rajaram said at a news conference in Mexico City in 2014.
Rajaram also served as Director of the Integrated Gene Management Program at the International Center for Agricultural Research in the Dry Areas (ICARDA) before formally retiring in 2008. In his retirement, he continued as a special scientific advisor to CIMMYT and ICARDA.
Longstanding partners pushing forward for farmers
“Indiaâs agricultural research community is proud of the distinguished achievements of Dr. Rajaram,” said Trilochan Mohapatra, Director General of the Indian Council of Agricultural Research (ICAR) and Secretary of the Department of Agricultural Research and Education (DARE), of India’s Ministry of Agriculture and Farmers’ Welfare. “ICAR greatly appreciates its valuable collaborations with CIMMYT to help farmers grow better crops and conserve resources under increasingly challenging conditions.”
The partnership of India with CIMMYT harks back to the 1960s-70s, when Indian farmers tripled national wheat yields in a few years by growing Borlaugâs high-yield wheat varieties and adopting improved farming practices.
In 2011, India and CIMMYT jointly launched the Borlaug Institute for South Asia (BISA) to improve cropping systems and food security, helping farmers to confront climate change and natural resource scarcities, among other challenges.
S. Ayyappan, former ICAR Director General who signed the joint declaration of intent for BISAâs establishment in India, has been honored with the 2022 Padma Shri Award.
CIMMYT is a non-profit international agricultural research and training organization focusing on two of the worldâs most important cereal grains, maize and wheat, and related cropping systems and livelihoods. Wheat varieties derived from CIMMYT and ICARDA research cover more than 100 million hectares â nearly two-thirds of the area sown to improved wheat worldwide â and bring benefits in added grain worth as much as $3.8 billion each year.
A recent publication in the journal Frontiers of Plant Science provides results of the first-ever study to test genomic selection in breeding for resistance to wheat blast, a deadly disease caused by the fungus Magnaporthe oryzae that is spreading from its origin in Brazil to threaten wheat crops in South Asia and sub-Saharan Africa.
Genomic selection identifies individual plants based on the information from molecular markers, DNA signposts for genes of interest, that are distributed densely throughout the wheat genome. For wheat blast, the results can help predict which wheat lines hold promise as providers of blast resistance for future crosses and those that can be advanced to the next generation after selection.
In this study, scientists from the International Maize and Wheat Improvement Center (CIMMYT) and partners evaluated genomic selection by combining genotypic data with extensive and precise field data on wheat blast responses for three sets of genetically diverse wheat lines and varieties, more than 700 in all, grown by partners at locations in Bangladesh and Bolivia over several crop cycles.
The study also compared the use of a small number of molecular markers linked to the 2NS translocation, a chromosome segment from the grass species Aegilops ventricosa that was introduced into wheat in the 1980s and is a strong and stable source of blast resistance, with predictions using thousands of genome-wide markers. The outcome confirms that, in environments where wheat blast resistance is determined by the 2NS translocation, genotyping using one-to-few markers tagging the translocation is enough to predict the blast response of wheat lines.
Finally, the authors found that selection based on a few wheat blast-associated molecular markers retained 89% of lines that were also selected using field performance data, and discarded 92% of those that were discarded based on field performance data. Thus, both marker-assisted selection and genomic selection offer viable alternatives to the slower and more expensive field screening of many thousands of wheat lines in hot-spot locations for the disease, particularly at early stages of breeding, and can speed the development of blast-resistant wheat varieties.
Read the full study:
Genomic Selection for Wheat Blast in a Diversity Panel, Breeding Panel and Full-Sibs Panel
The research was conducted by scientists from the International Maize and Wheat Improvement Center (CIMMYT), the Bangladesh Wheat and Maize Research Institute (BWMRI), the Instituto Nacional de InnovaciĂłn Agropecuaria y Forestal (INIAF) of Bolivia, the Borlaug Institute for South Asia (BISA) and the Indian Council of Agricultural Research (ICAR) in India, the Swedish University of Agricultural Sciences (Alnarp), and Kansas State University in the USA. Funding for the study was provided by the Bill & Melinda Gates Foundation, the Foreign and Commonwealth Development Office of the United Kingdom, the U.S. Agency for International Development (USAID), the CGIAR Research Program on Wheat (WHEAT), the Indian Council of Agricultural Research (ICAR), the Swedish Research Council, and the Australian Centre for International Agricultural Research (ACIAR).
Cover photo: A researcher from Bangladesh shows blast infected wheat spikes and explains how the disease directly attacks the grain. (Photo: Chris Knight/Cornell University)
In nature, plants are simultaneously exposed to a complex system of biotic and abiotic stresses that limit crop yield. The cereal cyst nematode Heterodera filipjevi and dryland crown rot, caused by Fusarium, are important diseases facing cereal production around the world that cause significant yield loss. Yield loss accelerates when those diseases coexist with other abiotic stresses, such as drought.
Hexaploid bread wheat (Triticum aestivum L.) is an essential staple food for a large part of the worldâs population, covering around 20% of daily caloric intake in the human diet, with global production at about 670.8 million tons per year, produced over 215.4 million hectares of land worldwide. Therefore, the program studying soil-borne pathogens at the International Maize and Wheat Improvement Center (CIMMYT)âs Turkey office initiated a study to investigate the effect of soil borne diseases (H. filipjevi and Fusarium culmorum) individually and in combination with drought on some morphological and physiological traits in wheat germplasm with different genetic tolerances to the three studied factors.
In this study, yield components included thousand kernel weight, spike weight, seed per spike and total grain yield. Morphological parameters, including plant height, final plant number (seedling emergence), relative water content, leaf chlorophyll content, H. filipjevi cyst number and presence of crown rot, were studied under greenhouse conditions in Turkey.
The main findings of the study showed that the interaction among water stress, F. culmorum and H. filipjevi increased the damage on the wheat parameters studied when compared with each stress applied alone. One of the most significant damages was seen in high seedling mortality under the three combined stresses (56% seedling death rate), which indicates the damage on wheat yield might occur at the seedling stage rather than later stages. This reduces plant density per area, which was ultimately responsible for low grain yield produced. The known dryland disease, crown rot, caused by F. culmorum, was significantly pronounced under water-stressed conditions.
In all studied parameters, the lowest damage was found among the resistant cultivars to biotic or abiotic stresses. This underscores the importance of wheat breeding programs to develop resistant germplasm, and reminds farmers to replace their old, susceptible varieties with new, resistant ones.
Based on our intensive experience in the CWANA region, most wheat growers basically do not recognize soil borne pathogens as a problem. In fact, most of them do not know that what nematode or soil fungal species are in their fields affecting yield. The term âhidden enemyâ perfectly applies to the problems in the region and beyond. Integrated pest management (IPM) is, however, not practiced in the entire region and soil borne pathogen-induced yield losses are simply accepted.
We can conclude from this study that yield reduction in wheat due to soil borne pathogens could be lessened by improving and understanding the concept of IPM in the region where the practice of winter mono-culturing of wheat is the norm. Management of cereal soil-borne pathogens, especially cereal cyst nematode and crown rot, could involve an integrated approach that includes crop rotation, genetic resistance, crop nutrition and appropriate water supply.
Cover photo: Four different test crops show different stresses: T1V8 = Drought, T2V8 = Drought and Nematodes, T3V8 = Drought and fungus, T4V8 = Drought and nematode and fungus together. (Credit: CIMMYT)
Nearly four decades of repeated crossing and selection for heat and drought tolerance have greatly improved the climate resilience of modern wheat varieties, according to new research emerging from a cross-continental science collaboration.
At the same time, climate change has likely slowed breeding progress for high-yielding, broadly adapted wheat, according to the new study, published recently in Nature Plants.
âBreeders are usually optimistic, overlooking many climate change factors when selecting,â said Matthew Reynolds, wheat physiologist at the International Maize and Wheat Improvement Center (CIMMYT) and co-author of the publication. âOur findings undermine this optimism and show that the amplified interaction of wheat lines with the environment due to climate change has made it harder for breeders to identify outstanding, broadly adapted lines.â
What do 10 million data points tell scientists?
Each year for nearly half a century, wheat breeders taking part in the CIMMYT-led International Wheat Improvement Network (IWIN) have tested approximately 1,000 new, experimental wheat lines and varieties at some 700 field sites in over 90 countries.
Promising lines are taken up by wheat breeding programs worldwide, while data from the trials is used to guide global breeding and other critical wheat research, explained Wei Xiong, CIMMYT crop modeler/physiologist based in China and lead author of the new paper.
âTo date, this global testing network has collected over 10 million data points, while delivering wheat germplasm estimated to be worth several billion dollars annually in extra productivity to hundreds of millions of farmers in less developed countries,â Xiong said.
Xiong and his colleagues analyzed âcrossover interactionsâ â changes in the relative rankings of pairs of wheat lines â in 38 years of data from four kinds of wheat breeding trials, looking for the extent to which climate change or breeding progress have flipped those rankings. Two of the trials whose data they examined focused on yield in bread wheat and durum wheat, while the other two assessed wheat linesâ performance under high temperatures and in semi-arid environments, respectively.
In addition to raising yields, wheat breeders are endowing the crop with added resilience for rising temperatures.
âWe found that warmer and more erratic climates since the 1980s have increased ranking changes in global wheat breeding by as much as 15 percent,â Xiong said. âThis has made it harder for breeders to identify superior, broadly adapted lines and even led to scientists discarding potentially useful lines.â
Conversely, wheat cultivars emerging from breeding for tolerance to environmental stresses, particularly heat, are showing substantially more stable yields across a range of environments and fostering wheatâs adaptation to current, warmer climates, while opening opportunities for larger and faster genetic gains in the future, according to the study.
Past research has shown that modern wheat varieties not only increase maximum yields but also guarantee more reliable yields, a benefit that adds millions of dollars each year to farm income in developing countries and greatly reduces farmersâ risk.
âAmong other things, our findings argue for more targeted wheat breeding and testing to address rapidly shifting and unpredictable farming conditions,â Reynolds added.
Read the full study:
Increased ranking change in wheat breeding under climate change
Cover photo: Wheat fields at CIMMYTâs experimental station in Ciudad ObregĂłn, Sonora state, Mexico. Photo: M. Ellis/CIMMYT.
Like many development research and funding organizations, the Australian Centre for International Agricultural Research (ACIAR) is emphasizing a renewed commitment to a nutrition-sensitive approach to agricultural development projects.
As part of the International Year of Fruits and Vegetables, a recent blog proposed that one central issue of improved nutrition is consumption of more fruit and vegetables. We agree that a diverse diet including fruits and vegetables should be accessible to every person. Here we highlight the presence of a wider picture.
In the past decade, awareness has grown about the importance of diets that are rich in vitamins and minerals, and the need to combat micronutrient malnutrition which can lead to irreversible health outcomes impacting entire economies and perpetuating a tragic cycle of poverty and economic stagnation.
Lack of vitamins and minerals, often called âhidden hunger,â is not confined to lower-income food-insecure countries. In richer countries we clearly see a transition towards energy-rich, micronutrient-poor diets. In fact, populations throughout the world are eating more processed foods for reasons of convenience and price. To hit our global hunger and health targets we need to invest in nutrition-sensitive agricultural research and production as well as promoting affordable diets with varied and appealing nutrient-rich foods.
Alongside hunger, we have a pandemic of diet-related diseases that is partly caused by the over-consumption of energy-rich junk diets. This is because modern food formulations are often shaped towards addictive and unhealthy products. We see this in rising levels of obesity and diabetes, some cancers, heart diseases and chronic lung conditions.
Investing in agri-food research and improving nutrition will be much cheaper than treating these diet-related non-communicable diseases. Besides being healthier, many people will be much happier and able to live more productive lives.
Yet, the picture is bigger than micronutrient malnutrition. Even if new investments in research enable us to increase the production and delivery of fruits, vegetables and other nutrient-rich foods such as legumes and nuts, we will not have cracked the whole problem of food security, nutrition and health.
Besides âhidden hunger,â many hundreds of millions of people worldwide are hungry because they still lack the basic availability of food to live and work.
Enter cereals. Wheat, maize and rice have been the major sources of dietary energy in the form of carbohydrates in virtually all societies and for thousands of years: recent research in the Middle East suggests that the original âpaleoâ diet was not just the result of hunting and gathering, but included cereals in bread and beer!
There are three reasons why cereals are essential to feeding the world:
But all is not well with cereals these days. Cereals are under siege from climate change-related heat and drought, and new and more virulent forms of plant diseases, which threaten our agriculture and natural resources. There remains much research to undertake in this era of rapidly changing climatic conditions, and of economic and political stresses.
Here are a few strategies for agri-food research and its supporters:
Cereals matter, but in an age of misinformation, we still have to be cautious: Some people are susceptible to certain components of cereals such as gluten. People who are medically diagnosed with cereal intolerances must shape their diets accordingly and get their carbohydrates and bioactive food components from other sources.
So, we cannot live on bread alone: We should aim for diets which are rich in diverse foods.
Such diets include fruits and vegetables that must be accessible to people in different regions, particularly to the most vulnerable, and that provide different macronutrients, micronutrients and essential bioactive components. For most of us, the health-promoting content of cereals means that they must remain a major part of the global diet.
Nigel Poole is Emeritus Professor of International Development at SOAS University of London and Consultant at the International Maize and Wheat Improvement Center (CIMMYT).
Rajiv Sharma is Senior Scientist at the International Maize and Wheat Improvement Center (CIMMYT).
Alison Bentley is the Director of the Global Wheat Program at the International Maize and Wheat Improvement Center (CIMMYT).
In an op-ed on Newsweek, CIMMYT director general Bram Govaerts wrote argues the best protection is actually reducing food system risks by building food system resilience against shocks. He highlighted how previous investments in agricultural research and development generated evidence-based strategies that mitigate global food price crisis.
Grafting is the technique of joining the shoot of one plant with the root of another, so they continue to grow together as one. Until now it was thought impossible to graft grass-like plants in the group known as monocotyledons because they lack a specific tissue type, called the vascular cambium, in their stem.
Researchers at the University of Cambridge have discovered that root and shoot tissues taken from the seeds of monocotyledonous grasses â representing their earliest embryonic stages â fuse efficiently. Their results are published today in the journal Nature.
An estimated 60,000 plants are monocotyledons; many are crops that are cultivated at enormous scale, for example rice, wheat and barley.
The finding has implications for the control of serious soil-borne pathogens including Panama Disease, or Tropical Race 4, which has been destroying banana plantations for over 30 years. A recent acceleration in the spread of this disease has prompted fears of global banana shortages.
âWeâve achieved something that everyone said was impossible. Grafting embryonic tissue holds real potential across a range of grass-like species. We found that even distantly related species, separated by deep evolutionary time, are graft compatible,â said Julian Hibberd in the University of Cambridgeâs Department of Plant Sciences, senior author of the report.
The technique allows monocotyledons of the same species, and of two different species, to be grafted effectively. Grafting genetically different root and shoot tissues can result in a plant with new traits â ranging from dwarf shoots, to pest and disease resistance.
Alison Bentley, CIMMYT Global Wheat Program Director and a contributor to the report, sees great potential for the grafting method to be applied to monocot crops grown by resource-poor farmers in the Global South. âFrom our major cereals, wheat and rice, to bananas and matoke, this technology could change the way we think about adapting food security crops to increasing disease pressures and changing climates.â
High magnification images show successful grafting of wheat in which a connective vein forms between root and shoot tissue after four months. White arrows show the graft junction. (Photo: Julian Hibberd)Monocotyledons breakthrough
The scientists found that the technique was effective in a range of monocotyledonous crop plants including pineapple, banana, onion, tequila agave and date palm. This was confirmed through various tests, including the injection of fluorescent dye into the plant roots â from where it was seen to move up the plant and across the graft junction.
âI read back over decades of research papers on grafting and everybody said that it couldnât be done in monocots. I was stubborn enough to keep going â for years â until I proved them wrong,â said Greg Reeves, a Gates Cambridge Scholar in the University of Cambridge Department of Plant Sciences, and first author of the paper.
âItâs an urgent challenge to make important food crops resistant to the diseases that are destroying them,â Reeves explained. âOur technique allows us to add disease resistance, or other beneficial properties like salt-tolerance, to grass-like plants without resorting to genetic modification or lengthy breeding programmes.â
The worldâs banana industry is based on a single variety, called the Cavendish banana â a clone that can withstand long-distance transportation. With no genetic diversity between plants, the crop has little disease-resilience. And Cavendish bananas are sterile, so disease resistance cannot be bred into future generations of the plant. Research groups around the world are trying to find a way to stop Panama Disease before it becomes even more widespread.
Grafting has been used widely since antiquity in another plant group called the dicotyledons. Dicotyledonous orchard crops â including apples and cherries, and high-value annual crops including tomatoes and cucumbers â are routinely produced on grafted plants because the process confers beneficial properties, such as disease resistance or earlier flowering.
The researchers have filed a patent for their grafting technique through Cambridge Enterprise. They have also received funding from Ceres Agri-Tech, a knowledge exchange partnership between five leading universities in the United Kingdom and three renowned agricultural research institutes.
âPanama disease is a huge problem threatening bananas across the world. Itâs fantastic that the University of Cambridge has the opportunity to play a role in saving such an important food crop,â said Louise Sutherland, Director of Ceres Agri-Tech.
Ceres Agri-Tech, led by the University of Cambridge, was created and managed by Cambridge Enterprise. It has provided translational funding as well as commercialisation expertise and support to the project, to scale up the technique and improve its efficiency.
This research was funded by the Gates Cambridge Scholarship programme.
Read the study:
Monocotyledonous plants graft at the embryonic root-shoot interface
FOR MORE INFORMATION, OR TO ARRANGE INTERVIEWS, CONTACT THE MEDIA TEAM:
Marcia MacNeil, Head of Communications, CIMMYT.
Jacqueline Garget, Communications Manager, Office of External Affairs and Communications, University of Cambridge
ABOUT THE UNIVERSITY OF CAMBRIDGE:
The University of Cambridge is one of the worldâs top ten leading universities, with a rich history of radical thinking dating back to 1209. Its mission is to contribute to society through the pursuit of education, learning and research at the highest international levels of excellence.
The University comprises 31 autonomous Colleges and 150 departments, faculties and institutions. Its 24,450 student body includes more than 9,000 international students from 147 countries. In 2020, 70.6% of its new undergraduate students were from state schools and 21.6% from economically disadvantaged areas.
Cambridge research spans almost every discipline, from science, technology, engineering and medicine through to the arts, humanities and social sciences, with multi-disciplinary teams working to address major global challenges. Its researchers provide academic leadership, develop strategic partnerships and collaborate with colleagues worldwide.
The University sits at the heart of the âCambridge clusterâ, in which more than 5,300 knowledge-intensive firms employ more than 67,000 people and generate ÂŁ18 billion in turnover. Cambridge has the highest number of patent applications per 100,000 residents in the UK.
ABOUT CIMMYT:
The International Maize and Wheat Improvement Center (CIMMYT) is the global leader in publicly-funded maize and wheat research and related farming systems. Headquartered near Mexico City, CIMMYT works with hundreds of partners throughout the developing world to sustainably increase the productivity of maize and wheat cropping systems, thus improving global food security and reducing poverty. CIMMYT is a member of the CGIAR System and leads the CGIAR Research Programs on Maize and Wheat and the Excellence in Breeding Platform. The Center receives support from national governments, foundations, development banks and other public and private agencies.
Cover photo: A banana producer in Kenya. (Photo: N. Palmer/CIAT)
