The world needs better management of water, soil, nutrients, and biodiversity in crop, livestock, and fisheries systems, coupled with higher-order landscape considerations as well as circular economy and agroecological approaches.
CIMMYT and CGIAR use modern digital tools to bring together state-of-the-art Earth system observation and big data analysis to inform co-design of global solutions and national policies.
Our maize and wheat genebanks preserve the legacy of biodiversity, while breeders and researchers look at ways to reduce the environmental footprint of agriculture.
Ultimately, our work helps stay within planetary boundaries and limit water use, nutrient use, pollution, undesirable land use change, and biodiversity loss.
Planning meeting and field day with farmers who want to participate in the Agriba Sustentable project, in El Greco, Pénjamo, in Mexico’s Guanajuato state. (Photo: CIMMYT)
A new partnership announced today between the International Maize and Wheat Improvement Center (CIMMYT), PepsiCo and Grupo Trimex will greatly contribute to scale out sustainable farming practices in the central Mexican states of Guanajuato and Michoacán, which together form the country’s second wheat producing region.
The project Agriba Sustentable — a shortened reference for Bajío Sustainable Agriculture — will promote the adoption of conservation agriculture-based sustainable intensification practices among local farmers who will have access to PepsiCo’s wheat grain supply chain via Grupo Trimex.
“A part of the wheat that we use in Mexico for our products comes from the Bajío region,” said Luis Treviño, Director of Sustainability at PepsiCo Latin America. “However, agricultural production in the region has needs and areas of opportunity that we were able to identify thanks to the experience and deep knowledge that CIMMYT has developed over the years.”
Agriba Sustentable is the latest example of the new business models that CIMMYT is exploring as part of its integrated development approach to agri-food systems transformation, which seeks to engage multiple public, private and civil sector collaborators in cereals value chain development and enhancement efforts.
CIMMYT agronomist Erick Ortiz (center) meets with farmers from Colorado de Herrera, Pénjamo, in Mexico’s Guanajuato state, who want to participate in the Agriba Sustentable project. (Photo: CIMMYT)
“The project’s specific goal is to improve the sustainability of the wheat production system in the Bajío region by enabling the adoption of technological innovations and sustainable production practices among at least 200 farmers in the Grupo Trimex supply chain during the first year of implementation, and to gradually scale out to reach many more farmers,” said Bram Govaerts, Director General of CIMMYT.
CIMMYT’s long-term field trials in Mexico have shown that conservation agriculture-based sustainable intensification practices raise wheat yields by up to 15% and cut greenhouse gas emissions by up to 40%.
“The farming practices that CIMMYT promotes reduce environmental impact,” said Mario Ruiz, Sourcing Manager of Grupo Trimex. “Conservation agriculture can cut CO2 emissions by up to 60% from reduced diesel consumption, lower fuel use by up to 70% and water consumption by 30%.”
According to PepsiCo Mexico, Agriba Sustentable is an important step for its global vision PepsiCo Positive (pep+), which seeks to offset its agricultural footprint by promoting sustainable farming on 2.8 million hectares globally. The plan also aims to improve the livelihoods of 250,000 people who are part of their global agricultural supply chain and to source sustainably 100% of the company’s key ingredients by 2030.
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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. For more information, visit staging.cimmyt.org.
Given the very heterogeneous conditions in smallholder agriculture in sub-Saharan Africa, there is a growing policy interest in site-specific extension advice and the use of related digital tools. However, empirical ex ante studies on the design of this type of tools are scant and little is known about their impact on site-specific extension advice.
In partnership with Oyakhilomen Oyinbo and colleagues at KU Leuven, scientists at the International Maize and Wheat Improvement Center (CIMMYT) have carried out research to clarify user preferences for tailored nutrient management advice and decision-support tools. The studies also evaluated the impact of targeted fertilizer recommendations enabled by such tools.
Understanding farmers’ adoption
A better understanding of farmers’ and extension agents’ preferences may help to optimize the design of digital decision-support tools.
Oyinbo and co-authors conducted a study among 792 farming households in northern Nigeria, to examine farmers’ preferences for maize intensification in the context of site-specific extension advice using digital tools.
Overall, farmers were favorably disposed to switch from general fertilizer use recommendations to targeted nutrient management recommendations for maize intensification enabled by decision-support tools. This lends credence to the inclusion of digital tools in agricultural extension. The study also showed that farmers have heterogeneous preferences for targeted fertilizer recommendations, depending on their resources, sensitivity to risk and access to services.
The authors identified two groups of farmers with different preference patterns: a first group described as “strong potential adopters of site-specific extension recommendations for more intensified maize production” and a second group as “weak potential adopters.” While the two groups of farmers are willing to accept some yield variability for a higher average yield, the trade-off is on average larger for the first group, who have more resources and are less sensitive to risk.
The author recommended that decision-support tools include information on the riskiness of expected investment returns and flexibility in switching between low- and high-risk recommendations. This design improvement will help farmers to make better informed decisions.
Community leaders talk to researchers in one of the villages in norther Nigeria which took part in the study. (Photo: Oyakhilomen Oyinbo)
Members of the survey team participate in a training session at Bayero University Kano, Nigeria. (Photo: Oyakhilomen Oyinbo)
One of the sites of nutrient omission trials, used during the development phase of the Nutrient Expert tool in Nigeria. (Photo: Oyakhilomen Oyinbo)
Using data from a discrete choice experiment, the study showed that extension agents were generally willing to accept the use of digital decision-support tools for site‐specific fertilizer recommendations. While extension agents in the sample preferred tools with a more user‐friendly interface that required less time to generate an output, the authors also found substantial preference heterogeneity for other design features. Some extension agents cared more about the outputs, such as information accuracy and level of detail, while others prioritized practical features such as the tool’s platform, language or interface.
According to the authors, accounting for such variety of preferences into the design of decision-support tools may facilitate their adoption by extension agents and, in turn, enhance their impact in farmars’ agricultural production decisions.
Interface of the Nutrient Expert mobile app, locally calibrated for maize farmers in Nigeria.
Impact of digital tools
Traditional extension systems in sub-Saharan African countries, including Nigeria, often provide general fertilizer use recommendations which do not account for the substantial variation in production conditions. Such blanket recommendations are typically accompanied by point estimates of expected agronomic responses and associated economic returns, but they do not provide any information on the variability of the expected returns associated with output price risk.
Policymakers need a better understanding of how new digital agronomy tools for tailored recommendations affect the performance of smallholder farms in developing countries.
To contribute to the nascent empirical literature on this topic, Oyinbo and colleagues evaluated the impact of a nutrient management decision-support tool for maize – Nutrient Expert — on fertilizer use, management practices, yields and net revenues. The authors also evaluated the impacts of providing information about variability in expected investment returns.
To provide rigorous evidence, the authors conducted a three-year randomized controlled trial among 792 maize-producing households in northern Nigeria. The trial included two treatment groups who are exposed to site-specific fertilizer recommendations through decision-support tools — one with and another one without additional information on variability in expected returns — and a control group who received general fertilizer use recommendations.
Overall, the use of nutrient management decision-support tools resulted in greater fertilizer investments and better grain yields compared with controls. Maize grain yield increased by 19% and net revenue increased by 14% after two years of the interventions. Fertilizer investments only increased significantly among the farmers who received additional information on the variability in expected investment returns.
The findings suggest including site-specific decision support tools into extension programming and related policy interventions has potential benefits on maize yields and food security, particularly when such tools also supply information on the distribution of expected returns to given investment recommendations.
The research-for-development community has tried different approaches to optimize fertilizer recommendations. In Nigeria, there are several tools available to generate location-specific fertilizer recommendations, including Nutrient Expert. As part of the Taking Maize Agronomy to Scale in Africa (TAMASA) project, CIMMYT has been working on locally calibrated versions of this tool for maize farmers in Ethiopia, Nigeria and Tanzania. The development was led by a project team incorporating scientists from the African Plant Nutrition Institute (APNI), CIMMYT and local development partners in each country.
Next steps
Some studies have shown that dis-adoption of seemingly profitable technologies — such as fertilizer in sub-Saharan Africa — is quite common, especially when initial returns fall short of expectations or net utility is negative, producing a disappointment effect.
In the context of emerging digital decision-support tools for well-targeted fertilizer use recommendations, it remains unclear whether farmers’ initial input use responses and the associated economic returns affect their subsequent responses — and whether the disappointment effect can be attenuated through provision of information about uncertainty in expected returns.
Using our three-year randomized controlled trial and the associated panel dataset, researchers are now working on documenting the third-year responses of farmers to site-specific agronomic advice conditional on the second-year responses. Specifically, they seek to better document whether providing farmers with information about seasonal variability in expected investment returns can reduce possible disappointment effects associated with their initial uptake of site-specific agronomic advice and, in a way, limit dis-adoption of fertilizer.
Cover photo: A farmer shows maize growing in his field, in one of the communities in northern Nigeria where research took place. (Photo: Oyakhilomen Oyinbo)
A recent study of the groundwater in India revealed that, by 2025, large areas of the north-western and southern parts of the country will have “critically low groundwater availability”, leading to a decrease in cropping that will ultimately cause an imbalance in the food security for millions.
A blast-blighted stalk of wheat. (Photo: Chris Knight/Cornell)
Every year, the spores of the wheat blast fungus lie in wait on farms in South America, Bangladesh, and beyond. In most years, the pathogen has only a small impact on the countries’ wheat crops. But the disease spreads quickly, and when the conditions are right there’s a risk of a large outbreak — which can pose a serious threat to the food security and livelihood of farmers in a specific year.
To minimize this risk, an international partnership of researchers and organizations have created the wheat blast Early Warning System (EWS), a digital platform that notifies farmers and officials when weather conditions are ideal for the fungus to spread. The team, which began its work in Bangladesh, is now introducing the technology to Brazil — the country where wheat blast was originally discovered in 1985.
The International Maize and Wheat Improvement Center (CIMMYT), the Brazilian Agricultural Research Corporation (EMBRAPA), Brazil’s University of Passo Fundo (UPF) and others developed the tool with support from USAID under the Cereal Systems Initiative for South Asia (CSISA) project.
Although first developed with the help of Brazilian scientists for Bangladesh, the EWS has now come full circle and is endorsed and being used by agriculture workers in Brazil. The team hopes that the system will give farmers time to take preventative measures against the disease.
Outbreaks can massively reduce crop yields, if no preventative actions are taken.
“It can be very severe. It can cause a lot of damage,” says Maurício Fernandes, a plant epidemiologist with EMBRAPA.
Striking first
In order to expand into a full outbreak, wheat blast requires specific temperature and humidity conditions. So, Fernandes and his team developed a digital platform that runs weather data through an algorithm to determine the times and places in which outbreaks are likely to occur.
If the system sees a region is going to grow hot and humid enough for the fungus to thrive, it sends an automated message to the agriculture workers in the area. These messages — texts or emails — alert them to take preemptive measures against the disease.
More than 6,000 extension agents in Bangladesh have already signed up for disease early warnings.
In Brazil, Fernandes and his peers are connecting with farmer cooperatives. These groups, which count a majority of Brazilian farmers as members, can send weather data to help inform the EWS, and can spread alerts through their websites or in-house applications.
Wheat blast can attack a plant quickly, shriveling and deforming the grain in less than a week from the first symptoms. Advance warnings are essential to mitigate losses. The alerts sent out will recommend that farmers apply fungicide, which only works when applied before infection.
“If the pathogen has already affected the plant, the fungicides will have no effect,” Fernandes says.
A blast from the past
Because wheat had not previously been exposed to Magnaporthe oryzae, most wheat cultivars at the time had no natural resistance to Magnaporthe oryzae, according to Fernandes. Some newer varieties are moderately resistant to the disease, but the availability of sufficient seed for farmers remains limited.
The pathogen can spread through leftover infected seeds and crop residue. But its spores can also travel vast distances through the air.
If the fungus spreads and infects enough plants, it can wreak havoc over large areas. In the 1990s — shortly after its discovery — wheat blast impacted around three million hectares of wheat in South America. Back in 2016, the disease appeared in Bangladesh and South Asia for the first time, and the resulting outbreak covered around 15,000 hectares of land. CGIAR estimates that the disease has the potential to reduce the region’s wheat production by 85 million tons.
In Brazil, wheat blast outbreaks can have a marked impact on the country’s agricultural output. During a major outbreak in 2009, the disease affected as many as three million hectares of crops in South America. As such, the EWS is an invaluable tool to support food security and farmer livelihoods. Fernandes notes that affected regions can go multiple years between large outbreaks, but the threat remains.
“People forget about the disease, then you have an outbreak again,” he says.
Essential partnerships
The EWS has its roots in Brazil. In 2017 Fernandes and his peers published a piece of research proposing the model. After that, Tim Krupnik, a senior scientist and country representative with CIMMYT in Bangladesh, along with a group of researchers and organizations, launched a pilot project in Bangladesh.
There, agriculture extension officers received an automated email or text message when weather conditions were ideal for wheat blast to thrive and spread. The team used this proof of concept to bring it back to Brazil.
According to Krupnik, the Brazil platform is something of a “homecoming” for this work. He also notes that cooperation between the researchers, organizations and agriculture workers in Brazil and Bangladesh was instrumental in creating the system.
“From this, we’re able to have a partnership that I think will have a significant outcome in Brazil, from a relatively small investment in research supplied in Bangladesh. That shows you the power of partnerships and how solutions can be found to pressing agricultural problems through collaborative science, across continents,” he says.
As the world turns its attention to the policy-shaping discussions during this week’s Pre-Summit of the UN Food System Summit, the need for science and innovation to advance the transformation of food, land and water systems is clear.
The International Maize and Wheat Improvement Center (CIMMYT), with its 50-year track record of impact, success and high return on investment, is essential to these efforts.
Our new institutional brochure, Maize and wheat science to sustainably feed the world, links CIMMYT’s mission, vision and excellence in science to the urgent needs of a world where an estimated tenth of the global population — up to 811 million people — are undernourished.
CIMMYT is also a crucial wellspring of response capacity to CGIAR — the largest global, publicly funded research organization scaling solutions for food, land and water system challenges.
Maize and wheat science to sustainably feed the world explains why we do what we do in light of these challenges.
CIMMYT leads maize and wheat research for food systems that deliver affordable, sufficient, and healthy diets produced within planetary boundaries.
Our research is focused on smallholder farmers in low- and middle-income countries and on improving the livelihoods of people who live on less than $2 a day.
CIMMYT science reaches them through innovation hubs, appropriate technologies, sustainable sourcing, and helps to address their needs and challenges through public policy guidance.
Applying high-quality science and strong partnerships, CIMMYT works for a world with healthier and more prosperous people, free from global food crises and with more resilient agri-food systems.
This story was originally published on the Inter Press Service (IPS) website.
Durum wheat field landscape at CIMMYT’s experimental station in Toluca, Mexico. (Photo: Alfonso Cortés/CIMMYT)
Back-to-back droughts followed by plagues of locusts have pushed over a million people in southern Madagascar to the brink of starvation in recent months. In the worst famine in half a century, villagers have sold their possessions and are eating the locusts, raw cactus fruits, and wild leaves to survive.
Instead of bringing relief, this year’s rains were accompanied by warm temperatures that created the ideal conditions for infestations of fall armyworm, which destroys mainly maize, one of the main food crops of sub-Saharan Africa.
Drought and famine are not strangers to southern Madagascar, and other areas of eastern Africa, but climate change bringing warmer temperatures is believed to be exacerbating this latest tragedy, according to The Deep South, a new report by the World Bank.
Up to 40% of global food output is lost each year through pests and diseases, according to FAO estimates, while up to 811 million people suffer from hunger. Climate change is one of several factors driving this threat, while trade and travel transport plant pests and pathogens around the world, and environmental degradation facilitates their establishment.
Crop pests and pathogens have threatened food supplies since agriculture began. The Irish potato famine of the late 1840s, caused by late blight disease, killed about one million people. The ancient Greeks and Romans were well familiar with wheat stem rust, which continues to destroy harvests in developing countries.
But recent research on the impact of temperature increases in the tropics caused by climate change has documented an expansion of some crop pests and diseases into more northern and southern latitudes at an average of about 2.7 km a year.
Prevention is critical to confronting such threats, as brutally demonstrated by the impact of the COVID-19 pandemic on humankind. It is far more cost-effective to protect plants from pests and diseases rather than tackling full-blown emergencies.
One way to protect food production is with pest- and disease-resistant crop varieties, meaning that the conservation, sharing, and use of crop biodiversity to breed resistant varieties is a key component of the global battle for food security.
CGIAR manages a network of publicly-held gene banks around the world that safeguard and share crop biodiversity and facilitate its use in breeding more resistant, climate-resilient and productive varieties. It is essential that this exchange doesn’t exacerbate the problem, so CGIAR works with international and national plant health authorities to ensure that material distributed is free of pests and pathogens, following the highest standards and protocols for sharing plant germplasm. The distribution and use of that germplasm for crop improvement is essential for cutting the estimated 540 billion US dollars of losses due to plant diseases annually.
Understanding the relationship between climate change and plant health is key to conserving biodiversity and boosting food production today and for future generations. Human-driven climate change is the challenge of our time. It poses grave threats to agriculture and is already affecting the food security and incomes of small-scale farming households across the developing world.
We need to improve the tools and innovations available to farmers. Rice production is both a driver and victim of climate change. Extreme weather events menace the livelihoods of 144 million smallholder rice farmers. Yet traditional cultivation methods such as flooded paddies contribute approximately 10% of global man-made methane, a potent greenhouse gas. By leveraging rice genetic diversity and improving cultivation techniques we can reduce greenhouse gas emissions, enhance efficiency, and help farmers adapt to future climates.
A farmer in Tanzania stands in front of her maize plot where she grows improved, drought tolerant maize variety TAN 250. (Photo: Anne Wangalachi/CIMMYT)
We also need to be cognizant that gender relationships matter in crop management. A lack of gender perspectives has hindered wider adoption of resistant varieties and practices such as integrated pest management. Collaboration between social and crop scientists to co-design inclusive innovations is essential.
Men and women often value different aspects of crops and technologies. Men may value high yielding disease-resistant varieties, whereas women prioritize traits related to food security, such as early maturity. Incorporating women’s preferences into a new variety is a question of gender equity and economic necessity. Women produce a significant proportion of the food grown globally. If they had the same access to productive resources as men, such as improved varieties, women could increase yields by 20-30%, which would generate up to a 4% increase in the total agricultural output of developing countries.
Practices to grow healthy crops also need to include environmental considerations. What is known as a One Health Approach starts from the recognition that life is not segmented. All is connected. Rooted in concerns over threats of zoonotic diseases spreading from animals, especially livestock, to humans, the concept has been broadened to encompass agriculture and the environment.
This ecosystem approach combines different strategies and practices, such as minimizing pesticide use. This helps protect pollinators, animals that eat crop pests, and other beneficial organisms.
The challenge is to produce enough food to feed a growing population without increasing agriculture’s negative impacts on the environment, particularly through greenhouse gas emissions and unsustainable farming practices that degrade vital soil and water resources, and threaten biodiversity.
Behavioral and policy change on the part of farmers, consumers, and governments will be just as important as technological innovation to achieve this.
The goal of zero hunger is unattainable without the vibrancy of healthy plants, the source of the food we eat and the air we breathe. The quest for a food secure future, enshrined in the UN Sustainable Development Goals, requires us to combine research and development with local and international cooperation so that efforts led by CGIAR to protect plant health, and increase agriculture’s benefits, reach the communities most in need.
Barbara H. Wells MSc, PhD is the Global Director of Genetic Innovation at the CGIAR and Director General of the International Potato Center. She has worked in senior-executive level in the agricultural and forestry sectors for over 30 years.
The fall armyworm is an invasive pest that eats more than 80 different crops, but has a particular preference for maize.
It is native to the Americas. It was first reported in Africa in 2016, and quickly spread throughout the continent. It reached India in 2018. It has since been reported in many other countries across Asia and the Pacific, and it reached Australia in 2020.
Millions of families in these regions are highly dependent on maize for their income and their livelihoods. If the fall armyworm keeps spreading, it will have disastrous consequences for them.
Scientists at CIMMYT have been working hard to find solutions to help farmers fight fall armyworm. Researchers have developed manuals for farmers, with guidelines on how to manage this pest. They have also formed an international research consortium, where experts from diverse institutions are sharing knowledge and best practices. Consortium members share updates on progress in finding new ways to tackle this global challenge. Scientists are now working on developing new maize varieties that are resistant to fall armyworm.
The fall armyworm can’t be eradicated — it is here to stay. CIMMYT and its partners worldwide will continue to work on this complex challenge, so millions of smallholder farmers can protect their crops and feed their families.
We began 2020 with grim news of the COVID-19 pandemic spreading from country to country, wreaking havoc on national economies, causing countless personal tragedies, and putting additional pressure on the livelihoods of the poor and hungry.
The global crisis exposed the enormous vulnerability of our food system.
If we have learned anything from the past year, it is that we need to urgently invest in science for renewed food systems that deliver affordable, sufficient, and healthy diets produced within planetary boundaries.
During this time, the dedication and resilience of the CIMMYT community allowed us to continue making important advances toward that vision.
We hope you enjoy reading our stories and will join us in actively working towards resilience, renewal and transition in our agri-food systems, to ensure that they are strong in the face of current and future crises.
An article in La Nación praises the work of a number of research institutions, including CIMMYT, for their use of science and technology to develop hybrid maize lines adapted to the needs of farmers, markets and consumers.
At the 8th World Congress on Conservation Agriculture (8WCCA), Martin Kropff, Director General of CIMMYT, argued that “agriculture cannot take a toll on the environment”, praising conservation agriculture for its contribution to building resilience to drought.
Scientists examine Ug99 stem rust symptoms on wheat. (Photo: Petr Kosina/CIMMYT)
The three rust diseases, yellow (stripe) rust, black (stem) rust, and brown (left) rust occur in most wheat production environments, causing substantial yield losses and under serious epidemics, can threaten the global wheat supply.
CIMMYT is one of the largest providers of elite germplasm to national partners in over 80 countries. CIMMYT nurseries, known for research in developing adaptive, high-yielding and high-quality germplasm, also carry resistance to several biotic and abiotic stresses, such as rust disease.
Through years of research and experience, CIMMYT has found that durable control of wheat rusts can be achieved by developing and deploying wheat varieties with complex adult-plant resistance (APR). A combination of both conventional and modern technologies in APR will enable breeders to address the problem of rusts and other diseases and continue progress in delivering higher genetic gains, a key goal of the Accelerating Genetic Gains in Maize and Wheat (AGG) project.
Genetic analyses show that a destructive wheat blast fungus that travelled from South America to South East Asia is now established in Zambia under rain-fed conditions, according to a new report from The Sainsbury Laboratory.
Wheat stalks grow in a field in India. (Photo: Saad Akhtar)
For scientists, determining how best to increase wheat yields to meet food demand is a persistent challenge, particularly as the trend toward sustainably intensifying production on agricultural lands grows.
The United Nations projects that the current global population of 7.6 billion will increase to more than 9.8 billion by 2050, making higher grain yield potential vital, particularly as climate instability increases due to global warming. International efforts are also focused on meeting the Zero Hunger target detailed in the UN Sustainable Development Goals before they expire in 2030.
Now, a new landmark research survey on the grain yield potential and climate-resilience of bread wheat (Triticum aestivum L.) has brought scientists a few strides closer to meeting their ambitions.
Grain yield has traditionally been an elusive trait in genomic wheat breeding because of its quantitative genetic control, which means that it is controlled by many genomic regions with small effects.
Challenges also include a lack of good understanding about the genetic basis of grain yield, inconsistent grain yield quantitative trait loci identified in different environments, low heritability of grain yield across environments and environment interactions of grain yield.
To dissect the genetic architecture of wheat grain yield for the purposes of the research, which appeared in Scientific Reports, researchers implemented a large-scale genome-wide association study based on 100 datasets and 105,000 grain yield observations from 55,568 wheat breeding lines developed by the International Maize and Wheat Improvement Center (CIMMYT).
They evaluated the lines between 2003 and 2019 in different sites, years, planting systems, irrigation systems and abiotic stresses at CIMMYT’s primary yield testing site, the Norman E. Borlaug Experimental Research Station, Ciudad Obregon, Mexico, and in an additional eight countries — including Afghanistan, India and Myanmar — through partnerships with national programs.
The researchers also generated the grain-yield associated marker profiles and analyzed the grain-yield favorable allele frequencies for a large panel of 73,142 wheat lines, resulting in 44.5 million data points. The marker profiles indicated that the CIMMYT global wheat germplasm is rich in grain yield favorable alleles and is a trove for breeders to choose parents and design strategic crosses based on complementary grain yield alleles at desired loci.
“By dissecting the genetic basis of the elusive grain-yield trait, the resources presented in our study provide great opportunities to accelerate genomic breeding for high-yielding and climate-resilient wheat varieties, which is a major objective of the Accelerating Genetic Gain in Maize and Wheat project,” said CIMMYT wheat breeder Philomin Juliana.
“This study is unique and the largest-of-its-kind focusing on elucidating the genetic architecture of wheat grain yield,” she explained, “a highly complex and economically important trait that will have great implications on future diagnostic marker development, gene discovery, marker-assisted selection and genomic-breeding in wheat.”
Currently, crop breeding methods and agronomic management put annual productivity increases at 1.2% a year, but to ensure food security for future generations, productivity should be at 2.4% a year.
So, the extensive datasets and results presented in this study are expected to provide a framework for breeders to design effective strategies for mitigating the effects of climate change, while ensuring food-sustainability and security.
Seeds are a cornerstone of food security. That is why the maize and wheat genebanks have always been at the heart of the work of the International Maize and Wheat Improvement Center (CIMMYT).
Earlier this year, as the CIMMYT community wished farewell to Denise Costich, Terence (Terry) Molnar stepped into her shoes and took over the management of the world’s largest and most diverse collection of maize.
Molnar calls himself a curator, but unlike his counterparts at libraries and museums, his job is not only about registering and showcasing the 28,000 unique seed collections of maize. He and his team make sure that the rich maize biodiversity collected throughout time and geographies stays alive, viable and accessible to others.
We sat down with Molnar to learn more about his unique role and what we can do to celebrate biodiversity on the International Day for Biological Diversity — and every other day.
