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Location: Americas

CIMMYT has several offices in the Americas, including global headquarters in Mexico and a regional office in Colombia. Activities are supported by an additional 140 hectares of stations in diverse agro-ecological zones of Mexico. CIMMYT’s genebank in Mexico stores 27,000 maize and 170,000 wheat seed collections – key to preserving the crop genetic diversity of the region. CIMMYT projects range from developing nutritionally enhanced maize to mapping regional climate change hot spots in Central America. The comprehensive MasAgro project aims to increase wheat production in Mexico by 9 million tons and maize production by 350,000 tons by 2030. CIMMYT promotes regional collaboration and facilitates capacity building for scientists, researchers and technicians.

Developing climate change resistant wheat

The International Maize and Wheat Improvement Center (CIMMYT) are at the forefront of dealing with the impact of climate change by developing wheat varieties with tolerance to heat and drought.

Wheat constitutes as much as 60% of daily calorie intake in developing countries. However, rising temperatures caused by climate change is reducing farmers’ yields.

Matthew Reynolds, Wheat Physiologist, and Maria Itria Ibba, Cereal Chemist, share how their work contributes towards securing food security and nutrition by breeding new wheat varieties.

Read the original article: Develoing climate change-resistant wheat

Connect rural areas with digital innovations to unlock climate resilience for hundreds of millions of farmers

A female farmer using digital agricultural tools. (Credit: C. De Bode/CGIAR)

Research shows that digital innovations can increase small-scale farmers’ incomes, boost the adoption of better practices, and increase resilience to climate shocks while reducing the gender gap and managing food system risks. However, these benefits are not universal. More than 600 million people and 40 percent of small farms are still not covered by mobile internet, especially in those countries most dependent on agricultural production. Across low- and middle-income countries, women are 7 percent less likely than men to own a mobile phone and 15 percent less likely to use mobile internet.

A new CGIAR Research Initiative, Digital Innovation, has been launched to research pathways to bridge this digital divide, improve the quality of information systems, and strengthen local capacities to realize the potential of digital technologies.

Read the original article: Connect rural areas with digital innovations to unlock climate resilience for hundreds of millions of farmers

CGIAR Initiative: Digital Innovation

Digital innovations can enable an unprecedented transformation of food, land and water systems for greater climate resilience and sustainability. To realize this potential, multidisciplinary expertise across the CGIAR must find solutions to three challenges affecting the Global South: 

  1. The digital divide: digital technologies and infrastructure do not meet people’s needs, especially women and rural populations. More than 600 million people live outside the reach of mobile networks, two-thirds of them in sub-Saharan Africa. 
  2. Weak information systems: available information is inadequate or does not reach those who need it most. More than 300 million small-scale producers lack access to digital climate services. Weak information systems prevent evidence-based policy responses and lead to missed opportunities to reduce poverty and increase economic growth. 
  3. Limited digital capabilities: digital literacy and skill levels across the Global South remain low, particularly for marginalized and food-insecure individuals and groups such as women.

Objective

The Digital Innovation Initiative aims to develop and support digital innovations to stimulate the inclusive, sustainable transformation of food, land and water systems in the areas of investments that policymakers could make to close the digital divide, information delivery systems that allow more people to take action against predicted risks, and ways for partner organizations and marginalized communities to enhance digital capabilities, access resources and opportunities. 

This objective will be achieved through:

  • Generating evidence on impacts of digital innovations and collaborative partnerships to create an enabling environment for digital ecosystems, unlocking local innovators’ access to investments and advanced technologies. 
  • Developing a suite of tools and guidelines to bridge the digital divide, ensuring that gender equality and social inclusion underly the development of digital innovations, research programs and their implementation. 
  • System dynamics modeling to understand complex dynamics in agrifood systems and support natural resource management authorities in equitably allocating water and land resources and managing risks. 
  • Real-time food system monitoring to provide timely and reliable information to stakeholders by applying AI-driven analytics of satellite remote sensing, internet-connected sensors, and other ground-truthed data from multidisciplinary sources. 
  • Strengthening partners’ capacity to collect real-time data, conduct data analytics and make data-driven decisions to enable equitable digital platforms and services.

The world cannot ignore the global food crisis and its consequences

Climate change is an undoubted contributor to the global food crisis. Natural disasters and poor weather is leading to 193 million people facing acute food insecurity.

While food aid is vital, improving food systems and reducing reliance on food imports is the route to a long-term solution. In an article for the Des Moines Register, Cary Fowler, US government food security envoy, details the importance of developing reliable local production and well-functioning markets to support farmers.

The United States government’s Feed the Future initiative is addressing some of these challenges, such as by supporting the International Maize and Wheat Improvement Center (CIMMYT) to develop drought-tolerant maize, which is now planted on 17 million acres in Africa. This variety is making a significant difference to food security.

Read the article: Opinion: The world cannot ignore the global food crisis and its consequences

MasAgro is “a gift for Africa”

Francisco Mayorga joins the CIMMYT Board of Trustees to reflect on MasAgro. (Credit: Francisco Alarcón/CIMMYT)

Between June 20-23, the International Maize and Wheat Improvement Center (CIMMYT) hosted its Board of Trustees meeting, with presentations spanning the breadth of its global projects.

One particular project captured the imagination of attendees: MasAgro, which promotes the sustainable intensification of maize- and wheat-based production systems in Mexico. Through implementing collaborative research initiatives, developing improved varieties, and introducing sustainable technologies and farming practices, the program aims to improve livelihoods and production systems for farmers by enhancing their connections with local value chain actors.

Francisco Mayorga, businessman and former Secretary of Agriculture for Mexico, and Lindiwe Sibanda, CIMMYT board member and member of the CGIAR System Board, presented on the creation of CIMMYT’s MasAgro program and its results. Sibanda interviewed Mayorga to learn where the project’s achievements can be scaled and replicated, describing the project as a “gift for Africa” from Mexico.

Farmers load hybrid maize cobs in sacks for horse transportation over the mountains in Chiapas, Mexico. (Credit: P. Lowe/CIMMYT)

What’s in it for farmers?

Built on the premise of ‘take it to the farmers’, MasAgro helps farmers understand the broader context of agrifood systems in order to facilitate their successful transition to sustainable farming practices. This is accomplished through innovation hubs: core spaces defined by similar agroecological conditions that promote participatory innovation processes and co-implement functional structures for the validation, adaptation, and scaling of sustainable solutions.

Innovation hubs facilitate mentorship by providing closeness between farmers and value chain actors. A physical and virtual network of research platforms, demonstration modules and extension areas support actors to gain skills and knowledge to achieve common objectives. For example, farmers can learn how about agricultural tools and practices and where best to use them on their land, and they now consider the impact of fertilizers on the soil and ecosystem and seek alternatives.

Useful information is provided via multiple communication tools, including mobile messaging, to enable effective knowledge sharing and innovation between actors. The network has led to farmers independently adapting and adopting new practices after learning from others.

The selling point for farmers is understanding why sustainable agriculture creates opportunities for their livelihoods and lives – with improved practices, they can establish a successful long-term setup to increase their yield and income. These opportunities will appeal to smallholders worldwide.

Silvia Suarez Moreno harvests maize in Chiapas, Mexico. (Credit: P. Lowe/CIMMYT)

Benefits for the public and private sector

What also differentiates MasAgro is the emphasis on public and private sector partnerships. CIMMYT collaborated with partners to develop the MasAgro mindset and build their capacity to deliver seed to small- and medium-sized farms. Sibanda praised the use of CIMMYT’s presence in Mexico for developing these connections.

Mayorga highlighted the importance of securing funding and support from the Ministry of Agriculture in the project’s success. He said he initially persuaded colleagues to invest by emphasizing MasAgro’s holistic approach, which considers all elements of farming, rather than dealing with them as individual elements.

Using the different government instruments to support the theory of change towards the impact of MasAgro is part of the success. For example, for businesses, the Mexican government provided funding for laboratory equipment and training needs after identifying seed company partners to support through their research programs and regional markets. Mayorga also celebrated partnerships with small and medium enterprises (SMEs), who were supported by CIMMYT engineers to design more effective machinery and think around scale-appropriate business models. This created additional businesses in the agricultural sector.

Through these partnerships, private sector organizations have invested in agricultural research and development that will benefit smallholders, prevent food insecurity, and support a shift to sustainable farming. Countries in Africa can benefit from similar investment, which could be achieved through exporting and recreating the MasAgro model.

Tzeltal farmer harvests beans in her maize field. (Credit: P. Lowe/CIMMYT)

Flexible government support

Practical support and policy change from the Mexican government further encouraged farmers to adopt sustainable practices. Mayorga explained how a subsidy for farmers’ fuel was replaced with alternative financial support for equipment. Sibanda described this initiative as “visionary” and “a triple win” – farmers could purchase a machine at a subsidized rate, use less labor, and cause less damage to the environment.

To incentivize large companies in Mexico that buy a lot of wheat, Mayorga tapped into their desire “to encourage an economic behavior in the farmer” and introduce a more entrepreneurial approach to agriculture. They encouraged businesses to buy grains from farmers at a better price and learn more about the MasAgro approach.

“You don’t stay with an idea as a policy advisor and politician – you popularize it, look for new champions, walk the talk and put money into it,” summarized Sibanda. “I think that’s a legacy.”

Regenerative agriculture in Mexico: the case of Bimbo

Grupo Bimbo has two pilots with the International Maize and Wheat Improvement Center (CIMMYT) in the Mexican states of Sonora, Sinaloa and Jalisco to embed sustainable practices.

Through regenerative agriculture, an approach which aims to improve soil health and protect water resources and biodiversity, Grupo Bimbo has set the goal of ensuring that 200,000 hectares of wheat are cultivated with regenerative agriculture practices by 2030, ensuring that by 2050 100% of its key ingredients will be produced with this type of practices.

Read more: Regenerative agriculture in Mexico: the case of Bimbo

The future of wheat

CIMMYT’s experimental station in Obregón, a small city in Mexico’s state of Sonora, is considered a mecca for wheat research and breeding. In 1945, Norman Borlaug arrived as a geneticist for a special project between the Mexican government and the Rockefeller Foundation, to help local farmers with wheat production. After a few years, his strong bond with the community, students and interns was key to making a remarkable difference on wheat research that save millions from famine and won him the Nobel Peace Prize. A legacy that has lasted for many decades.

At Obregón, scientists have access to state-of-the-art field facilities and an ideal location, in the northern Yaqui Valley. The station’s dry climate and favorable temperature in winter is suitable to assess yield potential, while its hot summers are ideal to study wheat’s tolerance to different stressors.

Here, scientists and field workers work hard all year round to ensure the future of wheat. Varieties grown in all continents have CIMMYT and Sonoran DNA.

SPECIAL THANKS TO: Jeanie Borlaug Laube. Jesús Larraguibel Artola, President of PIEAES (Patronato para la Investigación y Experimentación Agrícola del Estado de Sonora A.C.). Asociación de Organismos de Agricultores del Sur de Sonora A.C. (AOASS) Global Wheat Program, CIMMYT: Alison Bentley (Program Director), Karim Ammar, Rodrigo Rascón, Carolina Rivera, Alberto Mendoza, Leonardo Crespo and Nele Verhulst.

CREDITS: Production: Alfonso Cortés, Marta Millere and Silvia Rico, CIMMYT. Additional drone shots: Courtesy of INIFAP and PIEAES. Post-production: Silvia Rico, CIMMYT

MUSIC: The Way Up created by Evert Z. Licensed from Artlist.io (License owner: CIMMYT. Creator Pro License Number – 159864). Eclipse created by EFGR. Licensed from Artlist.io (License owner: CIMMYT. Creator Pro License Number – 159864).

Why co-creation is vital for sustainable agriculture

Agricultural mechanization engineer Subash Adhikari adjusts a maize shelling machine on a farmer´s verandah in Rambasti, Kanchanpur, Nepal. (Credit: P. Lowe/CIMMYT)

The adoption of climate-smart agricultural production processes and technologies is a vital strategy in attempts to mitigate the global impacts of climate change without compromising on food security. However, supporting farmers to permanently implement new technologies and approaches requires a deep understanding of their needs, robust training, and effective transfer of knowledge.

At the International Maize and Wheat Improvement Center (CIMMYT), projects across the Global South aim to embed agrifood systems that are sustainable for all.

To share how CIMMYT empowers farmers and develops new technologies, Director General Bram Govaerts attended a panel event hosted by the Business Council for International Understanding (BICU) on September 19. For an audience of foreign government officials, multilaterals, and private sector executives, panelists introduced new perspectives to support global food security efforts and inspire greater collaboration.

Partnership approach

Panelists were asked to explain the technologies that can be unlocked by agricultural financial mechanisms, referencing how research and development is keeping pace with the quick adaptations needed by farmers to address climate change.

Examples from CIMMYT’s participation in the AgriLAC Resiliente CGIAR Initiative, a project for sustainable agricultural development in Latin America and the Caribbean, highlighted the innovative partnerships that are pushing forward research and development in the sector, enabling food systems and actors to act quickly to meet food security needs, mitigate climate hazards, stabilize communities and reduce forced migration.

Scientists are conscious of ensuring that solutions to one challenge are not the cause of new problems elsewhere; co-development is essential to this, ensuring the views of all actors are represented. Using the Integrated Agri-food System Initiative (IASI) methodology, created by CIMMYT in partnership with the Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), projects can develop strategies and actions with a significant likelihood of supportive public and private investment that will transform food systems.

Expertise from farmers

Even the best agricultural technology in the world is only effective if it is used. When discussing barriers to the implementation of technology, Govaerts emphasized CIMMYT’s mechanization prototyping, co-creation, and experimentation work that bridges the gap between farmers and scientists and encourages adoption of new methods and tools.

Having farming influencers onboard has proved priceless, as these people co-create prototypes and experiments that demonstrate results and offer assured testimony to reluctant stakeholders.

Innovations can transform livelihoods, giving farmers a way to increase income and provide stability and better opportunities for their families – which is the most appealing reason for adoption.

Training programs are also fundamental, ensuring skills and knowledge around new technologies are freely available to farmers, technicians, and researchers. CIMMYT projects such as MasAgro in Mexico, has trained more than 3,000 producers and 400 technicians in sustainable agriculture, with more than 70,000 producers participating in educational events during the pandemic.

Hunger and climate change – a dual problem?

Conversation also centered on whether the development of new technologies is aiming to confront world hunger and climate change as separate issues, or whether solutions can be suitable for both challenges.

Essential actions to mitigate the food crisis require a global perspective, acknowledging that unexpected crises will always arise. For example, Russia and Ukraine account for 28% of the world’s wheat exports, so high prices are linked to supply chain disruption. More than 2.5 billion people worldwide consume wheat-based products, so the effects of these disruptions could mean significant hunger and potential civil unrest. Nations already in crisis, such as Yemen, Sudan and Ethiopia, may be worse hit, but other countries with high dependency on imports like Egypt are also affected.

Govaerts highlighted the inextricable links between the causes of food insecurity and climate change. He underscored CIMMYT’s holistic approach to overcoming widespread impacts on the global food system, such as the concurrent challenges of COVID-19, climate change and the Ukraine crisis, by co-developing lasting solutions incorporating these three elements:

  • Extensive research on climate change adaptation and mitigation in maize and wheat-based production systems across Africa, Asia, and Latin America.
  • Climate focused research aims to help smallholder farmers adapt to climate shocks and to raise and maintain yields profitably and sustainably by reducing greenhouse gas emissions.
  • Capacity building for stakeholders in the development and application of new technologies.

Many other deep disruptions are on their way. It is time to invest in science, research, innovation, technologies, and start practicing teamwork to allow those investments to translate into a better future for the planet, and for us.

About BICU:

BICU is a leading business-supported non-profit education initiative, established by President Eisenhower of the United States in 1955 for the purpose of facilitating public-private partnerships and high-level business to government dialogue.

Winner of BGRI Gene Stewardship Award announced

This year’s Borlaug Global Rust Initiative (BGRI) Gene Stewardship Award recipients have been recognized for their innovative research tackling the global problem of wheat leaf rust.Led by Julio Huerta from the Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), members of the award-winning team include:

  • Héctor Eduardo Villaseñor Mir (cereal breeder)
  • René Hortelano Santa Rosa (cereal breeder)
  • Eliel Martínez Cruz, (cereal chemist)
  • María Florencia Rodríguez García (cereal pathologist)
  • Ernesto Solís Moya (wheat breeder)
  • Jorge Iván Alvarado Padilla (wheat breeder)

The award recognizes the team’s long-term contribution to Mexican wheat cultivation and their efforts to expand impacts worldwide. They have released many varieties with resistance to leaf rust, which has led to the stabilization of the disease in bread wheat.

Presented annually, the award is bestowed upon a team of researchers serving a national breeding program or other nationally based institution. Winners receive an inscribed bronze statue of Norman Borlaug.

Huerta has been hosted by the International Maize and Wheat Improvement Center (CIMMYT) in Mexico since the late 1990s.

Julio Huerta, wheat pathologist and recipient of the BGRI Gene Stewardship Award 2022, giving a talk to students introducing CIMMYT’s wheat breeding program. (Credit: CIMMYT)

BGRI Technical Workshop

Receiving the prize at the 2022 BGRI Technical Workshop on September 9, Huerta said, “The award means a recognition from the global rust scientific community for the hard work (flesh, mind, soul and spirit) over the years, carried with many colleagues around the world to keep rust disease under control.”

Alison Bentley, director of the Global Wheat Program, also participated in the event with a presentation on the connection between conflict and vulnerability in global food systems. She explored reasons why wheat has been dramatically impacted by the conflict in Ukraine and summarized the proposed response agenda by CIMMYT.

Mexican farming can transition to be more resilient with technology

In Mexico and around much of the world, the cost of food fell sharply last month but it remains dangerously close to the all-time highs posted earlier this year, according to an agency of the United Nations.

New data from the Food Price Index of the Food and Agricultural Organization provide even more proof that if we’re to build a resilient system of agriculture that keeps food abundant and affordable, farmers like me need access to the best, forward-facing and science-based technologies—and not the backward-looking restrictive measures that many governments are trying to force upon food producers.

That’s especially true here in Mexico, where public officials are promoting dangerous agriculture policies that will damage yield potential of Mexico’s farmers and add to our country’s current food inflation. Paradoxically, the world’s leading agricultural research center for wheat and maize has issued a new call for “long-term agri-food system resilience.”

The International Wheat and Maize Improvement Center, also known as CIMMYT and headquartered just outside Mexico City, is an amazing resource for farmers everywhere. My family has participated in its work for decades, going back to when Norman Borlaug, the father of the Green Revolution, was starting to make big progress on wheat yields.

In July, a team of CIMMYT scientists published their strategy for dealing with soaring food prices. They focused mainly on wheat, which was subjected to so much stress because of the Russian invasion of Ukraine, but their general recommendations apply to every commodity.

Their short-term advice involves boosting production and partially replacing wheat flour with other low-cost cereals to off-set high wheat prices. In the middle and long terms, CIMMYT calls for more resilience in our food systems by genetically improving seeds and controlling pests. Significantly, the authors urge “building capacity to promote extensive pest and pathogen monitoring.”

This is important advice because pests, weeds, and disease are three of the biggest threats to food production pretty much everywhere. If we’re going to develop a “long-term agri-food system resilience” that involves everything from the climate-change mitigation and gender equity that CIMMYT also advocates, it must start by helping farmers like me defend our crops from their most basic but permanently evolving threats.

And that means giving us access to science-based technology. We need the best seeds, the best machines, and the best crop management techniques. We also need the best crop protection so that what we plant can meet its full potential.

Rather than limiting the options of farmers we should seek to expand them. This in fact is the great legacy of CIMMYT. Through sound science and creative innovation, it has given farmers more tools than ever before.

On my farm, we already fight pests, weeds, and disease through traditional practices like crop rotation. Yet this age-old practice is no longer enough. In this era of sustainability and conservation, we especially need advanced crop protection, which can function as a “virtual plow” that strengthens our soil as it locks in moisture, kidnaps carbon, enhances biodiversity, improves root systems, and reduces erosion.

In the years ahead, we’d like to explore additional crop-protection technologies, such as drone applications which would allow us to work with more precision and less dependence on fossil fuels.

As we think about the future, and as farmers everywhere try to grow more food on less land, we should embrace technology as a solution rather than fear it as a problem.

We have so many real problems with war, inflation, access to fuel and fertilizer, market turmoil, and climate change that we don’t need to restrict ourselves by hesitating in the application of new technologies, especially when they have been demonstrated to be safe. (If we trick ourselves into banning these options, farmers will pay a steep price as they struggle to grow food and consumers will bear the cost of it whenever they eat.)  All technological options should remain on the table.

Although food prices fell by 8.6 percent between June and July, they are more than 13 percent higher than they were at this time last year, according to the FAO’s Food Price Index.

This may be a silver lining amid dark clouds, but the forecast is unpredictable: “The decline in food commodity prices from very high levels is welcome,” said FAO chief economist Maximo Torero, who also warned that “many uncertainties remain” and they “pose serious strains for global food security.”

Agriculture must become more resilient, as CIMMYT pleads.

And farmers like me need the support of policy makers and the general public as we struggle to grow the food everyone needs.

Read the original article: Mexican farming can transition to be more resilient with technology

Afghan wheat landrace shows promise for rust resistance

Rust pathogens are the most ubiquitous fungal pathogens that continue to pose a serious threat to wheat production. The preferred strategy to combat these diseases is through breeding wheat varieties with genetic resistance.

Landraces are a treasure trove of trait diversity, offer an excellent choice for the incorporation of new traits into breeding germplasm, and serve as a reservoir of genetic variations that can be used to mitigate current and future food challenges. Improving selection efficiency can be achieved through broadening the genetic base through using germplasm pool with trait diversity derived from landraces.

In a recent study, researchers from the International Maize and Wheat Improvement Center (CIMMYT) used Afghan landrace KU3067 to unravel the genetic basis of resistance against Mexican races of leaf rust and stripe rust. The findings of this study not only showcase new genomic regions for rust resistance, but also are the first report of Lr67/Yr46 in landraces. This adult plant resistance (APR) gene confirms multi-pathogenic resistance to three rust diseases and to powdery mildew.

Using genotype sequencing and phenotyping, the authors also report an all-stage resistance gene for stripe rust on chromosome 7BL, temporarily designated as YrKU. The genetic dissection identified a total of six quantitative trait locus (QTL) conferring APR to leaf rust, and a further four QTL for stripe rust resistance.

Although use of landraces in wheat breeding has been practiced for a long time, it has been on a limited scale. This study represents a significant impact in breeding for biotic stresses, particularly in pest and disease resistance.

Read the full study here: Identification and Characterization of Resistance Loci to Wheat Leaf Rust and Stripe Rust in Afghan Landrace “KU3067”

Cover photo: Yellow rust screening takes place at a CIMMYT experimental station in Mexico. (Credit: Sridhar Bhavani/CIMMYT)

Farmers’ views on app usage for information sharing

Mobile phones are increasingly shaping the ways information is shared across industries, including in agriculture. The digitization of agricultural systems expedited by substantial efforts to narrow the digital divide and include smallholders means that data ownership and privacy issues are more relevant than ever.

The use of smartphone-based apps to improve accessibility to information for smallholder farmers has previously been under researched. In this publication, scientists from Ghent University and the International Maize and Wheat Improvement Center (CIMMYT) investigate incentives for smallholder farmers to use an agricultural advisory app in which data is shared using a designed discrete choice experiment.

Leveraging survey data from 392 farmers in Mexico, a conditional logit (CL) model was used to gain deeper insights into the preferences for attributes related to its usage. Groups and profiles were explored through a latent class (LC) model to investigate heterogeneity.

Farmers across ages were found to support the use of technology-based, site-specific extension services. The CL model results revealed farmers’ positive preference to receive support at first use and access to training, while they felt negatively towards sharing data with private actors. Meanwhile, the LC model demonstrates differences in preferences when farmers’ connectedness to the CIMMYT innovation hub and mastery approach goals variables are considered as a grouping variable. These variables also affect farmer preferences towards data sharing.

This study’s main contribution is in demonstrating the importance of nonfinancial incentives and influence of data sharing on farmer preferences. Through this improved understanding, the potential of technology in improving farmers’ welfare can be further realized.

Read the study here: How to Make a Smartphone-Based App for Agricultural Advice Attractive: Insights from a Choice Experiment in Mexico

Cover photo: María del Refugio Galván, a producer of barley from Irapuato, Guanajuato, Mexico, has been involved in the smartphone-app project. (Credit: Francisco Alarcón/CIMMYT)

Fighting back against Ug99 wheat stem rust

Sridhar Bhavani, head of rust pathology and molecular genetics and the International Maize and Wheat Improvement Center (CIMMYT), shared potential solutions for fighting back against wheat stem rusts like Ug99.

More than 200 new wheat varieties released by CIMMYT over the last ten years have contributed to reducing the spread of wheat stem rust in East Africa, where the disease originated. Scientists identify genes resistant to Ug99 and breed new varieties that are not susceptible to stem rust pathogens.

For long-term success, combining multiple resistant genes within a single variety is the way to go.

Read more: Fighting back against Ug99 wheat stem rust

Achieving sixty years of wheat yield increase

Achieving greater food security requires a continued increase in global wheat yields, which the developing world plays a central role in meeting. Newly published research covering 60 years of wheat yield trends in the Yaqui Valley, Mexico, provides insights into how farmers can increase yields to address this need.

By dividing the 60-year interval into three 20-year periods between 1960-2019 and correcting farm yield for the strong influence of inter-annual variation in January to March minimum temperature, scientists from Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the International Maize and Wheat Improvement Center (CIMMYT) have taken steps towards advancing the sustainability of the Valley’s wheat cropping system by studying farm yield for the irrigated spring wheat production environment.

Total yield increase, corrected for temperature and CO2 rise, relative to average yield in each period, was 4.17%, 0.47%, and 1.59% p.a. for 1960–79, 1980–99, and 2000–19, respectively. The breeding component, estimated by the increase in the Varietal Yield Index in farmers’ fields, rose at 0.97%, 0.49%, and 0.71% p.a., respectively. The remaining yield change (3.16, -0.02%, and 0.87% p.a., respectively) comprised the net effect of improved crop management (agronomic progress), plus that of off-farm changes.

In the first period, off-farm developments were bolstered by strong government financial support whereas developments in the second period were hindered by the breakdown of the traditional smallholder land system and withdrawal of government support. The final period experienced better prices and improved access to technical advice.

Wheat is likely to continue playing a dominant role in the Yaqui Valley for the next 20-year period, especially from potential yield increase through breeding. However, closing the yield gap is becoming more challenging due to fluctuations in energy price, goals to achieve net zero CO2 and environmental signals. The biophysical sustainability of the Valley’s wheat cropping system requires urgent actions through better fertilizer management, greater cropping diversity, integrated management of biotic threats, acceptance of no-till, residue retention and controlled traffic.

Lessons from the Yaqui Valley bear importance for global wheat security given that without area increase and new technologies, food security will increasingly depend on developing countries.

Read the full publication here: Sixty years of irrigated wheat yield increase in the Yaqui Valley of Mexico: Past drivers, prospects and sustainability

Cover photo: Workers sowing wheat into sorghum residue. (Credit: CIMMYT)

Understanding the role of organic material application in soil microbial community structures

While previous studies have demonstrated the importance of organic material in soil for sustainable agricultural practices, there has been limited research into how organic material application affects the soil microbial community structures.

Researchers from El Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) studied soil from the International Maize and Wheat Improvement Center’s (CIMMYT) long-term experiment in northwestern Mexico to determine the effect on the soil metagenome after adding easily decomposable organic residues. The soil was collected from plots where maize and wheat were cultivated without tillage on permanent beds with crop residue left on the soil surface since 1992.

Dried young maize plants were added to the soil in the laboratory. After three days of incubation, soil samples were analyzed using shotgun metagenomic sequencing to discover how the application of young maize plants affects the structure of microbial communities in arable soil, how the potential functioning of microbial communities is altered, and how the application affects the soil taxonomic and functional diversity.

Bacterial and viral groups were strongly affected by organic material application, whereas archaeal, protist and fungal groups were less affected. Soil viral structure and richness were impacted, as well as metabolic functionality. Further differences were recorded in cellulose degraders with copiotrophic lifestyle, which were enriched by the application of young maize plants, while groups with slow growing oligotrophic and chemolithoautotrophic metabolism performed better in unamended soil.

Given the importance of embedding and adopting sustainable agricultural practices as part of climate change adaptation and mitigation, the study improves our insight in a key aspect of sustainable agriculture, the management of crop residues.

Read the full study: Application of young maize plant residues alters the microbiome composition and its functioning in a soil under conservation agriculture: a metagenomics study

Cover photo: Wheat crops growing at CIMMYT’s long-term experiment site in Ciudad Obregon, Mexico. (Credit: Nele Verhulst/CIMMYT)