A CIMMYT technician cuts a leaf sample for DNA extraction. (Photo: CIMMYT)
Wheat breeders from across the globe took a big step towards modernizing their molecular breeding skills at a recent workshop sponsored by the Wheat Initiative, with the CGIAR Excellence in Breeding Platform (EiB) and the International Maize and Wheat Improvement Center (CIMMYT).
The workshop focused on three open-source tools used in molecular breeding: GOBii-GDM for genomic data management, Flapjack for data visualization and breeding analysis, and Galaxy for Genomic Selection. These tools help breeders make selections more quickly and precisely, and ultimately lead to more cost effective and efficient improvement of varieties.
The Wheat Initiative — a global scientific collaboration whose goals are to create improved wheat varieties and disseminate better agronomic practices worldwide — and its Breeding Methods and Strategies expert working group had planned to host these trainings during the 2020 Borlaug Global Rust Initiative Technical Workshop in the United Kingdom. After it became obvious that in-person trainings were not possible, the course organizers — including CIMMYT molecular wheat breeder Susanne Dreisigacker and EiB Adoption Lead and former GOBii project director Elizabeth Jones — decided to come together to host online workshops.
Many of the tools will be incorporated into EiB’s Enterprise Breeding System (EBS), a new integrated data management system being developed for CGIAR breeders. Jones plans to also design training modules for these molecular breeding tools that will be accessible to anyone through the EiB Toolbox.
The first session of the workshop “Transforming Wheat Breeding Through Integrated Data Management with GOBii and Analysis in Flapjack” benefited breeders from Australia, Canada, Ethiopia, France, India, Ireland, Italy, Morocco, Pakistan, Switzerland, Tunisia, the United Kingdom and the United States.
Susanne Dreisigacker presents during one of the sessions of the workshop.
Powering data analysis around the world
The workshop series, “Transforming Wheat Breeding Through Integrated Data Management with GOBii and Analysis in Flapjack,” aimed to benefit breeders from wheat producing countries all over the world, with sessions over two different time zones spread out over three days to reduce “Zoom fatigue.” Participants joined the first session from Australia, Canada, Ethiopia, France, India, Ireland, Italy, Morocco, Pakistan, Switzerland, Tunisia, the United Kingdom and the United States.
“It was wonderful to see the diversity of participants that we were able to train through an online workshop, many of whom otherwise might not have been able to travel to the UK for the original meeting,” said Jones. “Participants were very engaged, making the workshop so rewarding.”
The workshop was guided by Teresa Saavedra, Wheat Initiative coordinator. Apart from Dreisigacker and Jones, other trainers explained specific tools and approaches. Iain Milne from the James Hutton Institute in Scotland gave more details about the Flapjack genotyping visualization tool, which includes analysis for pedigree verification, marker assisted backcrossing and forward breeding. Andrew Kowalczyk, developer at Diversity Arrays Technology, spoke about the genotyping data QC tool DArTView.
A CIMMYT technician performs one of the steps to extract DNA samples from plants. (Photo: CIMMYT)
Clay Sneller, wheat breeder at Ohio State University, contributed training materials for important molecular breeding tools. Carlos Ignacio, previously based at the International Rice Research Center (IRRI) and now working on a PhD in Genomic Selection at Ohio State University, contributed his experience as a GOBii team member and a major contributor towards the design of Flapjack tools. Star Gao, application specialist with GOBii and now a requirements analyst for the Enterprise Breeding System, also facilitated the sessions.
Gilles Charmet, research director at the France’s National Research Institute for Agriculture, Food and Environment (INRAE), introduced the sessions in the Americas/Europe time zone with welcome remarks and overview of the goals of the Wheat Initiative. Alison Bentley, director of the CIMMYT Global Wheat Program, briefed on the achievements and goals of the CIMMYT Wheat program and the Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project.
“This training will contribute towards us reaching our AGG goals of accelerating gains in wheat, by sharing technical knowledge, and allowing our beneficiary partners to have state-of-the-art know-how in the use of genetic and genomic data,” Bentley said.
Participant Stéphane Boury from Caussade Semences, France commented, “This was a very effective way to learn about new tools in wheat breeding.”
The sessions continue in Australasia next week, and will be introduced by Peter Langridge, chair of the Scientific Board for the Wheat Initiative, and EiB director Michael Quinn. Sanjay Kumar Singh, incoming chair of the Breeding expert working group for the Wheat Initiative, will close the event.
Denise E. Costich, the recently retired head of the Maize Collection at the Germplasm Bank of the International Maize and Wheat Improvement Center (CIMMYT), sometimes likes to include a Woody Allen quote in her presentations.
“I have no idea what I’m doing,” declares the text over a photo of a befuddled-looking Allen. “But incompetence never stopped me from plunging in with enthusiasm.”
This is perhaps Costich’s tongue-in-cheek way of acknowledging the unusual trajectory that led her to the Germplasm Bank and her zeal for new and interesting challenges. But it is in no way an accurate reflection of the skill, knowledge and humane managerial style she brought to the job.
“CIMMYT requires individuals with a broad set of experiences,” says Tom Payne, head of the Wheat Collection at CIMMYT’s Germplasm Bank. Though she was not trained as a crop scientist, and despite having never worked in a genebank before, Costich’s rich set of professional and life experiences made her an ideal person for the job.
From Ithaca and back again
Born and raised in Westbury, NY, Costich spent much of her childhood on a tree nursery. Her grandfather was the manager, her father became the sales director and eventually her sister also went into the horticulture business. While her experiences on the nursery contributed to an early interest in plants and ecology, the business aspect of the nursery eluded her. “I just can’t sell things. I’m terrible,” Costich says. “But I really do like to study them.”
This studiousness took her to Cornell University in Ithaca, NY, where she initially declared as a wildlife biology major. Her notion of what it meant to “study things” was influenced by her early heroes, primatologists and field biologists Dian Fossey and Jane Goodall. It involved travel. Fieldwork in faraway places. So, when the opportunity arose at the end of her sophomore year to travel to Kenya with Friends World College, Costich didn’t hesitate.
Costich eventually spent four years in Kenya, studying baboons. When she finally returned to Ithaca, she knew two things. Fieldwork was absolutely her thing, and she wanted to pursue a doctorate.
A chance conversation with her housemates in her last semester led to a post-graduation fieldwork stint in the Brazilian Amazon under the supervision of the legendary tropical and conservation biologist, Thomas Lovejoy. But instead of a dissertation topic, she stumbled across a parasite, a case of leishmaniasis and the realization that the rainforest was not the work environment for her.
Unexpected influences and outcomes continued to mark Costich’s career throughout her graduate studies at the University of Iowa. She found her plant not in the field, but while reading a dusty review paper as an exchange student at the University of Wisconsin. Her study of Ecballium elaterium (a wild species in the Cucurbitaceae, or squash, family) did not take her back to the tropics — where most of her peers were working and where she expected to be headed as a grad student — but rather to Spain where, incidentally, she first learned Spanish.
Several years after defending, Costich landed a tenure-track position in the Biology Department at The College of New Jersey. She continued to publish on Ecballium elaterium. Her career appeared to be settling into a predictable, recognizable academic trajectory — one with no obvious intersection with CIMMYT.
Then Costich saw an ad in the Ecological Society of America bulletin for a managing editor position for all of the Society’s journals. Her husband, a fellow biology Ph.D., had been working as an academic journal editor for several years. When Costich saw the ad she immediately drove over to her husband’s office. “I slapped the thing on his desk and said, ‘Here’s your job!’” she recalls.
Costich was right. Soon after, she was on her way back to Ithaca — where the Society’s offices were located — with a family that now included three children. While it was the right move for her family, it came at the cost of her budding academic career. In Ithaca, she soon found herself stuck in the role of itinerant postdoc.
Denise Costich in Spain in 1986, doing fieldwork on Ecballium elaterium with her daughter Mara.
An amazing turn of events
Costich admits that, especially the beginning, the return to Ithaca was tough, even depressing. Her recollections of these years can sound a bit like a game of musical chairs played with research laboratories. As one post-doc or research project wound down, she’d find herself scanning the campus for her next perch. She became very adept at it. “In ten years, I never missed a paycheck,” Costich says.
The turn of the millennium found Costich scanning the horizon yet again. As the days wound down at her latest post, a maize geneticist moved into the lab next door. What started as hallway jokes about Costich jumping ship and joining the maize lab soon turned into an interview, then a job offer.
The job introduced her to nearly everyone at Cornell working in maize genetics. Costich soon found herself managing the Buckler Lab’s work on maize population genetics. Meanwhile, she dabbled in side projects on Tripsacum, a perennial grass genus that is closely related to maize, and managed a major project on switchgrass. At the end of her postdoc, Buckler set to work trying to create a permanent position for her. Once again, Costich’s trajectory was beginning to take a stable, predictable form.
Then CIMMYT scientist Sarah Hearne showed up. “I’d heard through the grapevine — or maybe through the corn field — that the position of manager of the Maize Collection of CIMMYT’s Germplasm Bank was open… and that they were having a hard time trying to find a person for the position,” Costich recalls. She had met Hearne previously and personally knew and had worked with Suketoshi Taba, the pioneering longtime director of the germplasm bank. Naturally the topic emerged as she and Hearne caught up in Ithaca.
Hearne admitted that the search hadn’t yet been successful. “But I know the perfect person for the job,” she added.
“Yeah, who’s that?” Costich asked, not getting the setup.
Denise Costich, the maize collection manager at CIMMYT’s Maize and Wheat Germplasm Bank, shows one of the genebank’s more than 28,000 accessions of maize. (Photo: Luis Salazar/Crop Trust)
A stranger in a strangely familiar land
Costich was not a little surprised by the suggestion. She had never worked at a germplasm bank before. She was finally finding some stability at Cornell.
At the same time, her early dreams of exploring new places through her work, especially the tropics, beckoned. Her youngest son was nearly college-aged. Against the advice of some who had watched her work so hard to establish herself at Cornell, she took the plunge.
By the time she reached the CIMMYT campus in Texcoco, Costich had crisscrossed a good part of the globe, picking up Spanish here, management skills there, a deep knowledge of maize and its biological and cultural evolution yonder. During this life journey, she developed a deep humanism that is all her own.
It all seemed like happenstance, perhaps, until she reached Mexico and — suddenly, counterintuitively — found herself in the field she was perfectly adapted for. “It turned out that being a germplasm bank manager was the perfect job for me, and I didn’t even know it!” Costich says. “I ended up using everything I learned in my entire career.”
That isn’t to say that it was easy, especially at first. Taba, her predecessor, had occupied the post for decades, was a trained crop scientist, and had grown the bank from a regionally-focused collection with 12,000 accessions to the preeminent maize germplasm bank globally with 28,000 accessions, a state-of-the-art storage facility, and a slew of pioneering practices.
Not only had Taba left enormous shoes to fill, during his tenure — as is common in the expansionary phase of many projects — it had been difficult for the bank to keep a full accounting and understanding of all the new material that had been added. According to germplasm bank coordinator Cristian Zavala, by the time Costich joined CIMMYT “we knew very little about the material in our vaults.”
“Taba was primarily a breeder,” Costich says. “I actually think this oscillation between a focus on breeding and a focus on conservation and curation is good for the bank.”
Visiting a newly-built community seed reserve in Chanchimil, Todos Santos Cuchumatanes, Huehuetenango, Guatemala, in 2016. From left to right: Mario Fuentes (collaborator), a member of the community seed reserve staff, Denise Costich, Carolina Camacho (CIMMYT), Miriam Yaneth Ramos (Buena Milpa) and Esvin López (local collaborator).
Visiting one of the oldest community seed reserves in the region, Quilinco, Huehuetenango, Guatemala, in 2016. From left to right: Pedro Bello (UC Davis), Esvin López (local collaborator), Denise Costich, José Luis Galicia (Buena Milpa), Ariel Rivers (CIMMYT) and Miriam Yaneth Ramos (Buena Milpa).
Costich with the winners of the Second Harvest Fair and Largest Mature Ear of Jala Maize Contest in Coapa, in Mexico’s Nayarit state.
Costich (left) measures ears of corn for the Second Harvest Fair and Largest Mature Ear of Jala Maize Contest in Coapa, in Mexico’s Nayarit state in 2019.
Costich (center) shares some comments from the stage at the Second Harvest Fair and Largest Mature Ear of Jala Maize Contest in Coapa, in Mexico’s Nayarit state. To her left is Angel Perez, a participating farmer from La Cofradía, and to her right, Rafael Mier, Director of the Fundación Tortillas de Maíz Mexicana.
A bank for farmers
However, according to Zavala, because of the limited knowledge of much material they were working with, many in the bank’s rank-and-file didn’t fully understand the importance of their work. Morale was mixed. Moreover, despite an assumption that her new job would see her working closely with local smallholders, Costich found that the institution was poorly known by everyday farmers in its host country. Where it was known, associate scientist on innovation and social inclusion, Carolina Camacho, notes, there was an assumption that CIMMYT only worked with hybrid varieties of maize and not the native landraces many smallholders in Mexico depend on.
These became the principal axes of Costich’s work at the bank: curation of backlogged material, staff development, and community outreach.
Thus, when Costich realized that records were being kept in a combination of paper and rudimentary digital formats, she sent Zavala, a promising young research assistant at the time, to an internship at the USDA’s Maize Germplasm Bank Collection in Ames, Iowa, to workshops at CGIAR germplasm banks in Colombia (CIAT) and Ethiopia (ILRI), and to meetings on specialized topics in Germany and Portugal.
Zavala had never left the country before, spoke little English, and remembers being “rebellious” at work. “I needed more responsibility,” he says. “Dr. Denise saw that and helped me grow.” Upon returning from an early trip, Zavala helped implement up-to-date traceability and data management processes, including migrating the genebank’s data onto the USDA’s GRIN-Global platform.
But as Payne points out, Costich’s tenure was never about simple bean — or, in this case, grain — counting. “She sees a more human aspect of the importance of the collections,” he says. The main tasks she set for the bank came to be subsumed into the overarching goal of a fuller understanding of the contents of the bank’s vaults, one that encompassed both their biological and sociocultural importance.
When Costich came across a collection of maize landraces from Morelos state assembled by Ángel Kato in the mid 1960s that conserved the name of the farmer who had donated each sample, she worked with Camacho and graduate student Denisse McLean-Rodriguez to design a study involving the donor families and their communities. McLean-Rodriguez, Camacho and Costich set out to compare the effects of ex-situ versus in-situ landrace conservation in both genetic and socioeconomic terms.
Similarly, when a colleague at INIFAP invited Costich to be a judge at a yearly contest for largest ear of Jala landrace maize in Mexico’s Nayarit state, they soon began discussing how they could contribute more than just their participation as judges to the community. Starting in 2016 Costich was a co-lead on a study of the landrace’s genetic diversity as well as an initiative to rematriate Jala seeds conserved at CIMMYT for over 60 years.
Costich and members of the Maize Collection team hosting Pedro Bello from UC Davis (center, glasses) at the CIMMYT Germplasm Bank in Texcoco, Mexico, for a workshop on seed longevity and conservation techniques.
A genebank is not an island
Genebanks are bulwarks against genetic erosion. But, as Camacho explains, this mission can be understood in both very narrow and very broad senses. The narrow sense focuses on genetic processes per se: the loss of alleles. The broad sense includes the loss of cultural practices and knowledge built and sustained around the cultivation of a given landrace. Through the initiatives the bank has undertaken during her tenure, Costich has tried to demonstrate, both scientifically and in practice, how germplasm collections such as CIMMYT’s can complement, reinforce, and be enriched by the work of smallholders — de facto germplasm conservators in their own right — while contributing to the difficult task of combating genetic erosion in the broad sense.
One gets the sense that in Costich’s view this isn’t about a one-way process of big institutions “helping” smallholders. Rather it’s about collaboration among all the participants in an interdependent web of conservation. As she argued at her recent exit seminar, Costich views germplasm banks as one link in a chain of food security backups that begins at the farm level.
Indeed, Costich’s most recent initiative demonstrated how innovations intended for one link in the chain can travel upwards and find applications at bigger institutions.
Costich recently led an initiative with community seed banks in the Cuchumatanes mountain range of Guatemala to study the use of DryChain technology in post-harvest storage of maize. This experiment showed the enormous benefits that incorporating such technologies could yield for energy-insecure or low-tech family and community seed reserves.
Ultimately, however, the study led to a second experiment at CIMMYT’s tropical-climate station at Agua Fría in Mexico. With advice from collaborators at UC Davis and an industry partner (Dry Chain America), the seed conditioning team retrofitted an old drying cabinet at the station to dry maize without using heat, but rather by forcing air to circulate through sacks of drying beads. Under the direction of Filippo Guzzon, a postdoc and seed biologist working with Costich, the long-term viability of seeds dried using the accelerated technique versus traditional, slower techniques was tested. The study showed no loss in long-term viability using the accelerated drying technique.
Denise Costich, CIMMYT director general Martin Kropff, and the Maize Collection team confer certificates of participation to two visiting interns, Jiang Li (to the left of Kropff), a doctoral student from CAAS, Beijing, China, and Afeez Saka Opeyemi (to the right of Costich), a staff member of the IITA Germplasm Bank in Nigeria.
Costich and the Maize Collection team at the 2018 CIMMYT Christmas party. Filippo Guzzon, seated to the right of Costich, had just been offered a postdoc with the team.
Costich and the Maize Collection team at the 2018 CIMMYT Christmas party.
A very busy retirement
At her exit seminar, Costich was presented a plaque in appreciation of her service at CIMMYT by Kevin Pixley, director of the genetic resources program. Terence Molnar, maize breeder with the Genetic Resources Team, has succeeded Costich as the Maize Germplasm Bank Head.
For some of her close colleagues, however, Costich’s departure is not the end of the road. “This is not a forever goodbye,” Guzzon says. “I will continue to be in touch with my cuatita,” says Camacho, who has also left CIMMYT.
For her part, Costich echoes that this is not a forever goodbye at all. Not to her friends and colleagues, and certainly not to her work. At a socially-distanced, maize-based farewell lunch Costich held just days before her departure, she was still busy weaving social connections and furthering collaborations among maize fanatics of all stripes — from chefs and designers to scientists and policy advocates.
She is already considering taking a part time position at her old lab at Cornell and a return to Tripsacum research. At the same time, she will be a visiting scientist at Mexico’s National Center for Genetic Resources (CNRG), where officially she will be heading up part of an international switchgrass study. Costich is hoping to leverage her tenure at CIMMYT by getting involved in a push to help improve the Mexican national system for plant genetic resources. Additionally, she has recently accepted an invitation from Seed Savers Exchange to join their board and she is looking forward to volunteering her time and expertise to various seed-saving initiatives within that organization and their many collaborators.
Asked what she’s looking forward to tackling in her retirement that isn’t work related, Costich betrays her deep allegiance to the plant world. “I don’t know,” she says, “I’m thinking of starting a big vegetable garden.”
Cover photo: Denise Costich stands for a photo during the inauguration of the CIMMYT Genebank museum in 2019. (Photo: Alfonso Cortés/CIMMYT)
Sanjaya Rajaram at the Centro de Investigaciones Agrícolas del Noroeste (CIANO) in Ciudad Obregón, in Mexico’s Sonora state. (Photo: Gil Olmos/CIMMYT)
With great sorrow, we report the passing of Sanjaya Rajaram, former Wheat Program director and distinguished scientist at the International Maize and Wheat Improvement Center (CIMMYT), in Mexico on February 17, 2021, at the age of 78. Rajaram was one of the most successful and influential wheat breeders ever, and was distinguished with the World Food Prize in 2014.
As leader of bread wheat breeding and later director of CIMMYT’s Global Wheat Program, Rajaram — affectionately known by his colleagues as “Raj” — personally oversaw the development of more than 480 high-yielding, disease-resistant varieties sown on 58 million hectares in 51 countries, increasing global wheat production by more than 200 million tons during his lifetime in diverse regions across the globe.
“At CIMMYT, we all remember Raj as a great and humble colleague helping the team to perform at the highest levels of science with impact. Many of us within CIMMYT, as well in national programs worldwide, have been inspired by him,” said Martin Kropff, CIMMYT Director General. “We will also remember him as a friend who cared for others and treated all people alike.”
“Dr. Rajaram built a generation of wheat breeders at CIMMYT, ICARDA and national research institutions, who are carrying on his legacy and ensuring that new wheat varieties continue to reach farmers. We will deeply miss his presence and encouragement,” said Ravi Singh, head of the Wheat Improvement program once led by Rajaram.
Norman Borlaug (right) in the field with Sanjaya Rajaram, his successor as head of CIMMYT’s wheat program. (Photo: Gene Hettel/CIMMYT)
Hans Braun (center), Sanjaya Rajaram (third from right), Ravi Singh (first from right) and other colleagues stand for a photograph during a field day at CIMMYT’s experimental station in Ciudad Obregón, Sonora, Mexico. (Photo: CIMMYT)
Sanjaya Rajaram (right) speaks during a field day for scientists and staff at the CIMMYT experimental station in Toluca, Mexico, in 2013. (Photo: CIMMYT)
The World Food Prize 2014 was awarded to Sanjaya Rajaram for his achievements in plant research and food production. (Photo: RajaramS, CC BY-SA 4.0, via Wikimedia Commons)
Sanjaya Rajaram speaks at the 2015 BGRI Workshop in Sydney, Australia. (Photo: Christopher Knight/CIMMYT)
Sanjaya Rajaram speaks at the event to celebrate CIMMYT’s 50th anniversary in 2014. (Photo: Gerardo Mejía/CIMMYT)
A life devoted to wheat breeding
Born on a small farm in 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, diligently working as a wheat breeder alongside Nobel Prize Laureate and scientist Norman Borlaug in Mexico. Recognizing his talent and initiative, Borlaug appointed Rajaram as head of CIMMYT’s wheat breeding program at just 29 years of age.
Borlaug described Rajaram as “a scientist of great vision who made a significant contribution to the improvement of world wheat production, working for the benefit of hundreds of thousands of farmers in countries across the globe.”
Among Rajaram’s many accomplishments include being awarded the prestigious World Food Prize in 2014 for his role in increasing global wheat production and alleviating world hunger. His crossing of spring and winter wheat varieties led to new advances in wheat varieties that were stable across a wide range of environments, as well as featuring high yields and resistance to wheat diseases, particularly rust and foliar blight.
In 2015, he was awarded the Pravasi Bharatiya Samman award, the highest honor conferred on Indians overseas. He also received the highly prestigious Padma Shri award from the government of India in 2001, the Friendship Award from the government of China in 1998, numerous fellowships from scientific societies and doctorates from various universities.
Rajaram recognized the importance of sharing his knowledge and cultivating the talents of the next generation of plant scientists, training and mentoring more than 700 scientists from developing countries worldwide.
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, residing in his home of Mexico.
In addition to his successful career as a plant scientist, Rajaram launched and operated Resource Seeds International, a company to study and market seed of improved wheat varieties.
The CIMMYT community sends our deepest condolences to Rajaram’s family during this period.
In an op-ed, Martin Kropff, Director General of CIMMYT, and Nteranya Sanginga, Director General of the International Institute of Tropical Agriculture (IITA), discuss how higher-yielding, stress-tolerant maize varieties can not only help smallholder farmers combat climatic variabilities and diseases, but also effectively diversify their farms.
A maize ear harvested from a “milpa,” the maize-based intercrop that is a critical source of food and nutritional security for smallholder farming communities in remote areas such as the Western Highlands of Guatemala. (Photo: Cristian Reyna)
The traditional milpa intercrop — in which maize is grown together with beans, squash, or other vegetable crops — can furnish a vital supply of food and nutrients for marginalized, resource-poor communities in the Americas, according to a study published today in Nature Scientific Reports.
One hectare of a milpa comprising maize, common beans, and potatoes can provide the annual carbohydrate needs of more than 13 adults, enough protein for nearly 10 adults, and adequate supplies of many vitamins and minerals, according to the study. The research was based on data from nearly 1,000 households across 59 villages of the Western Highlands of Guatemala and is the first to relate milpa intercropping diversity with nutritional capacity, using multiple plots and crop combinations.
“The milpa was the backbone of pre-Columbian agriculture in North America, Mexico, and Central America,” said Santiago López-Ridaura, specialist in agricultural systems and climate change adaptation at the International Maize and Wheat Improvement Center (CIMMYT) and lead author of the article.
“Milpa production anchored around locally-adapted maize is still an essential food and nutritional lifeline for isolated, often indigenous communities throughout Mexico and Central America, and can be tailored to improve their food and nutritional security, along with that of small-scale farmers in similar settings,” he added.
Maize for feed or food and nutrition?
In modern times, some 1 billion tons of maize are harvested yearly from about 200 million hectares worldwide. Much of this output results from intensive monocropping of hybrids that yield an average 10 tons per hectare, in places like the U.S.
This massive world harvest goes chiefly for animal feed, corn starch, corn syrup, ethanol, and myriad industrial products, but in sub-Saharan Africa, Latin America, and parts of Asia, maize remains a critical food staple, often grown by smallholder farmers with yields averaging around 1.5 tons per hectare.
The Western Highlands of Guatemala is among the world’s poorest regions — a mountainous area ill-served by markets and where communities battered by food insecurity and malnutrition sow crops at altitudes of up to 3,200 meters, according to Cristian A. Reyna-Ramírez, a co-author of the study from the Universidad Autónoma Metropolitana-Xochimilco, Mexico.
“Fully two-thirds of farmers in this region grow milpas based on maize but varying the intercrops with potatoes, faba bean, and even fruit trees,” Reyna-Ramírez said. “Our study showed that combinations such as maize-common bean-faba bean, maize-potatoes, and maize-common bean-potatoes provided the most carbohydrates, proteins, zinc, iron, calcium, potassium, folate, thiamin, riboflavin, vitamin B6, niacin and vitamin C.”
The classic “milpa” intercrop comprises maize, beans, and squash. The bean plant climbs the maize stalk to reach sunlight and its roots add nitrogen to the soil; the squash leaves shade the soil, conserving moisture and inhibiting weed growth. Milpa systems are often grown on steep hillsides at a wide range of altitudes. (Photo: Cristian Reyna)
Better diets and routes out of poverty?
With typical landholdings of less than a quarter hectare and households averaging six members, Guatemala’s Western Highlands inhabitants cannot depend on the milpa alone to satisfy their needs, López-Ridaura cautioned.
“As with many smallholder farm communities, lack of land and general marginalization traps them in a vicious circle of poverty and malnutrition, forcing them to experiment with risky cash crops or for working-age members to undertake dangerous and heartbreaking migrations to find work and send back remittances,” he explains.
According to López-Ridaura, this study points the way for tailoring milpa systems to help communities that still rely on that intercrop or others that could benefit from its use.
Looking forward
Natalia Palacios Rojas, CIMMYT maize quality and nutrition expert and a co-author of this article, notes that calculations of this and other milpa studies consider raw nutrients and that research is needed on the nutritional contributions of cooked food and non-milpa foods such as poultry, livestock, home-garden produce, and purchased food.
“Further work should also address the effects of storing milpa produce on its nutrient stability and how the seasonal availability of milpa crops impacts diets and nutrition,” Palacios said.
The authors are grateful for funding from the United States Agency for International Development (USAID) as part of Feed the Future, the U.S. Government’s global hunger and food security initiative, under the Buena Milpa project, as well as the support of the CGIAR Research Program on Maize.
The Heat and Drought Wheat Improvement Consortium (HeDWIC) is a global research and capacity building network that takes wheat research from the theoretical to the practical by incorporating the best science into real-life breeding scenarios.
By harnessing the latest technologies in crop physiology, genetics and breeding, HeDWIC makes it easier for wheat scientists to work together on solutions to the complex problems of heat and drought adaptation, contributing to the development of new, climate-resilient wheat varieties for farmers. HeDWIC-associated scientists examine current breeding material and collections held in germplasm banks and apply genomic and phenomic tools to identify novel diversity for heat, drought adaptative traits. This results in novel pre-bred lines in terms of genetic diversity for key stress-adaptive traits suitable for use in breeding programs and/or re-selection as cultivars.
The consortium delivers these lines to public and private wheat programs worldwide via the International Wheat Improvement Network (IWIN) — coordinated for more than half a century by the International Maize and Wheat Improvement Center (CIMMYT) — as international public goods whose global impacts are well documented. Through PhD sponsorships and other opportunities for involvement in research, HeDWIC also provides hands-on training to young scientists, preparing a new generation of crop experts to tackle the pressing issues of crop adaptation under future climate scenarios.
HeDWIC adds value to developing more climate-resilient wheat varieties by:
Facilitating global coordination of wheat research related to heat and drought stress in partnership with the Wheat Initiative.
Developing research and breeding technologies in response to the priorities of stakeholders: researchers, breeders, farmers, seed companies, national programs, and funding organizations.
Connecting geographically and agro-climatically diverse sites for rigorous testing of promising concepts.
Curating data resources for use by the global wheat research community.
Accelerating the deployment of new knowledge and strategies for developing more climate resilient wheat.
Preparing a new generation of promising young scientists from climate-affected regions to tackle crop improvement challenges faced by their own countries.
Building additional scientific capacity of wheat researchers in a coordinated fashion that enables a faster response to productivity threats associated with climate change.
Enabling farmers to adapt to wheat production in a hotter and drier climate faster due to the coordinated effort and synergy lent by HeDWIC.
HeDWIC is directly funded by the Foundation for Food and Agriculture Research (FFAR) and is supported by in-kind contributions from IWIN, the Bill & Melinda Gates Foundation/UK Foreign, Commonwealth and Development Office (FCDO)-funded Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project, the CGIAR Research Program on Wheat (WHEAT), the International Wheat Yield Partnership, the Wheat Initiative’s AHEAD, and many international partners who support research and capacity building activities through ongoing collaboration.
It also builds on decades of breeding and collaborative research under abiotic stress coordinated by CIMMYT, with support from agencies including Mexico’s Secretariat of Agriculture and Rural Development (SADER), the CGIAR Trust Fund —in particular the Australian Centre for International Agricultural Research (ACIAR), the UK Foreign, Commonwealth and Development Office (FCDO), and the US Agency for International Development (USAID) — Australia’s Grains Research Development Corporation (GRDC), Germany’s Ministry of Agriculture (BMEL), the Bill & Melinda Gates Foundation, the US Department of Agriculture (USDA), and others.
The challenges facing our food system are growing, both in size and in complexity. In order to tackle these issues and meet the needs of our changing world, the International Maize and Wheat Improvement Center (CIMMYT) understands the importance of assembling a workforce that is diverse, creative and representative. In addition to encouraging STEM careers and hiring more women in scientific positions, we must also foster a more encouraging scientific community for women whose careers are just sparking.
Whether it is through a school field trip, a first internship or a PhD thesis project, CIMMYT is committed to encouraging young women to step into the lab and the fields, and up to the challenge, as we strive to create a more equitable community. On the International Day of Women and Girls in Science, we are inspired by the words of some of the many brilliant women whose scientific careers are just beginning, lighting the pathway to a more equitable future.
The International Day of Women and Girls in Science is particularly meaningful to CIMMYT’s new Global Wheat Program (GWP) Director, Alison Bentley. Listen and watch as she tells her story, from her first lightbulb moment on a high school field trip, to a leadership position in the wheat research world.
In celebration of the International Day of Women and Girls in Science, CIMMYT is participating in a unique marathon event, carrying a global conversation with CGIAR women scientists that are leading change and creating solutions to some of the world’s biggest challenges.
Powered by Women in Research and Science (WIRES), a new employee-led resource group at CGIAR, the event will showcase the many ways women scientists are transforming the way we look at our food, land and water systems around the world. In addition to learning about cutting-edge science, you’ll be able to engage with inspiring speakers in 13 different countries.
Join CIMMYT’s discussion on February 11, 2021, at 1:00 p.m. CST, and learn about the journeys of the 2020 Bänziger Award recipients, an engaging Q&A with four CIMMYT scientists, and our vision for a more equitable workforce. Register for the event.
Evidence of enormity and immediacy of the challenges climate change poses for life on earth seems to pour in daily. But important gaps in our knowledge of all the downstream effects of this complex process remain. And the global response to these challenges is still far from adequate to the job ahead. Bold, multi-stakeholder, multidisciplinary action is urgent.
In addition to exploring the important challenges climate changes poses for plant health, the event explored the implications for the wellbeing and livelihoods of smallholder farming communities in low- and middle- income countries, paying special attention to the gender dimension of both the challenges and proposed solutions.
The event was co-organized by researchers at the International Rice Research Institute (IRRI) and the International Centre of Insect Physiology and Ecology (icipe).
The overall webinar series is hosted by the International Maize and Wheat Improvement Center (CIMMYT), the International Potato Center (CIP), the International Food Policy Research Institute (IFPRI), the International Institute of Tropical Agriculture (IITA) and the International Rice Research Institute (IRRI). It is sponsored by the CGIAR Research Program on Agriculture for Nutrition (A4NH), the CGIAR Gender Platform and the CGIAR Research Program on Roots, Tubers and Bananas (RTB).
This is important
The stakes for the conversation were forcefully articulated by Shenggen Fan, chair professor and dean of the Academy of Global Food Economics and Policy at China Agricultural University and member of the CGIAR System Board. “Because of diseases and pests, we lose about 20-40% of our food crops. Can you imagine how much food we have lost? How many people we could feed with that lost food? Climate change will make this even worse,” Fan said.
Such impacts, of course, will not be evenly felt across geographic and social divides, notably gender. According to Jemimah Njuki, director for Africa at IFPRI, gender and household relationships shape how people respond to and are impacted by climate change. “One of the things we have evidence of is that in times of crises, women’s assets are often first to be sold and it takes even longer for them to be recovered,” Njuki said.
The desert locust has been around since biblical times. Climate change has contributed to its reemergence as a major pest. (Photo: David Nunn)
Shifting risks
When it comes to understanding the impact of climate change on plant health “one of our big challenges is to understand where risk will change,” said Karen Garrett, preeminent professor of plant pathology at the University of Florida,
This point was powerfully exemplified by Henri Tonnang, head of Data Management, Modelling and Geo-information Unit at icipe, who referred to the “unprecedented and massive outbreak” of desert locusts in 2020. The pest — known since biblical times — has reemerged as a major threat due to extreme weather events driven by sea level rise.
Researchers highlighted exciting advancements in mapping, modelling and big data techniques that can help us understand these evolving risks. At the same time, they stressed the need to strengthen cooperation not only among the research community, but among all the stakeholders for any given research agenda.
“The international research community needs to transform the way it does research,” said Ana María Loboguerrero, research director for Climate Action at the Alliance of Bioversity International and CIAT. “We’re working in a very fragmented way, sometime inefficiently and with duplications, sometimes acting under silos… It is difficult to deliver end-to-end sustainable and scalable solutions.”
Time for a new strategy
Such injunctions are timely and reaffirm CGIAR’s new strategic orientation. According to Sonja Vermeulen, the event moderator and the director of programs for the CGIAR System Management Organization, this strategy recognizes that stand-alone solutions — however brilliant — aren’t enough to make food systems resilient. We need whole system solutions that consider plants, animals, ecosystems and people together.
Echoing Fan’s earlier rallying cry, Vermeulen said, “This is important. Unless we do something fast and ambitious, we are not going to meet the Sustainable Development Goals.”
Cover photo: All farmers are susceptible to extreme weather events, and many are already feeling the effects of climate change. (Photo: N. Palmer/CIAT)
Australia’s High Commissioner to India, Barry O’ Farrell (left), observes the use of drone technology at the BISA experimental station in Ludhiana, India. (Photo: Uttam Kumar/CIMMYT).
Australia’s High Commissioner to India, Barry O’Farrell, visited the Borlaug Institute for South Asia (BISA) in Ludhiana, India, on January 20, 2021 along with his delegation.
O’Farrell acknowledged the historic role of the International Maize and Wheat Improvement Center (CIMMYT) sharing the seeds of the most recent, climate-resilient, high-yielding, and disease-resistant wheat genotypes. He also appreciated that this work is being continued with even greater vigor by BISA for the benefit of India and the whole of South Asia.
The High Commissioner was happy to note that wheat germplasm is freely shared with public and private sector national partners under constant guidance and collaboration with the Indian Council of Agricultural Research (ICAR) and the Department of Agriculture Research and Education (DARE).
O’Farrell emphasized the strong collaboration between Indian and Australian research institutes. He called for even more cross-learning between scientists and other stakeholders for research, policy and capacity development in the areas of land, water, climatic resilience, environmental sustainability and germplasm enhancement for the benefit of farmers of both countries.
Witnessing science in action
Arun Kumar Joshi, CIMMYT Regional Representative for Asia and Managing Director of BISA, welcomed the group and briefed the visitors on CIMMYT and BISA’s collaboration with ICAR and DARE.
H.S. Sidhu, Principal Research Engineer at BISA, and M.L. Jat, Principal Scientist and Systems Agronomist at CIMMYT, presented the major challenges and research outputs related to climate change, the food-energy-water nexus and the overall agricultural sustainability challenges faced by India.
One of the successful examples of collaboration between Australia and India is the Happy Seeder, which addresses these challenges through conservation agriculture and sustainable intensification. O’Farrell saw the expansive wheat fields sown with the Happy Seeder and was impressed by the technology.
The group also discussed the evidence-based policy changes that have taken place, as well as future strategies for accelerated impact through new approaches, like carbon farming. A detailed discussion took place on climate-smart agriculture research, with a focus on precision water and nutrient management using digital agriculture technologies and their complementarity for boosting Happy Seeder uptake.
The High Commissioner and his delegation also visited the wheat breeding program, where CIMMYT researcher Uttam Kumar explained the development of wheat genotypes — in collaboration with ICAR-DARE and the national agriculture research system — for a range of environments, management conditions, and against various stresses, with the ultimate objective of serving the needs of smallholder farmers.
O’Farrell also appreciated the BISA-designed Phenocart for high-throughput precision phenotyping in wheat improvement. O’Farrell highlighted and appreciated that this season, BISA is conducting the largest wheat breeding trial in South Asia: currently more than 60,000 plots are planted at the BISA station in Ludhiana alone.
The International Maize and Wheat Improvement Center (CIMMYT) is offering a new set of elite, improved maize hybrids to partners in eastern Africa and similar agro-ecological zones. National agricultural research systems (NARS) and seed companies are invited to apply for licenses to pursue national release of, and subsequently commercialize, these new hybrids, in order to bring the benefits of the improved seed to farming communities.
The deadline to submit applications to be considered during the first round of allocations is 9 February 2021. Applications received after that deadline will be considered during the following round of product allocations.
Information about the newly available CIMMYT maize hybrids from Eastern Africa breeding program, application instructions and other relevant material is available below.
To apply, please fill out the CIMMYT Improved Maize Product Allocation Application Forms, available for download at the links below. Each applicant will need to complete one copy of Form A for their organization, then for each hybrid being requested a separate copy of Form B. (Please be sure to use these current versions of the application forms.)
Researchers from the International Maize and Wheat Improvement Center (CIMMYT) and the International Livestock Research Institute (ILRI) have identified new genomic regions associated with maize stover quality, an important by-product of maize which can be used in animal feed.
The results of the study, published this month in Nature Scientific Reports, will allow maize breeders to select for stover quality traits more quickly and cost-effectively, and to develop new dual purpose maize varieties without sacrificing grain yield.
The researchers screened diverse Asia-adapted CIMMYT maize lines from breeders’ working germplasm for animal feed quality traits. They then used these as a reference set to predict the breeding values of over a thousand doubled haploid lines derived from abiotic stress breeding programs based on genetic information. Based on these breeding values, the scientists further selected 100 of these double haploid lines and validated the performance of stover quality traits through field-based phenotyping.
The results demonstrate the feasibility of incorporating genomic prediction as a tool to improve stover traits, circumventing the need for field or lab-based phenotyping. The findings significantly reduce the need for additional testing resources — a major hindrance in breeding dual-purpose maize varieties.
Interestingly, the researchers found that increased animal feed quality in maize stover had no impact on grain yield, a concern raised by scientists in the past.
“The main purpose of this study and overall purpose of this CIMMYT and ILRI collaboration was to optimize the potential of maize crops for farm families, increase income, improve livelihoods and sustainably manage the crop livestock system, within limited resources,” said P.H. Zaidi, a maize physiologist at CIMMYT and co-author of the study.
“More than 70% of the farmers in the tropics are smallholders so they don’t have a lot of land to grow crops for grain purposes and separate stover for animal feed, so this is a very sustainable model if they grow dual purpose maize.”
By growing maize simultaneously for both human consumption and animal feed, farmers can get the most out of their crops and conserve natural resources like land and water.
A farmer works in a maize field close to the Pusa site of the Borlaug Institute for South Asia (BISA), in the Indian state of Bihar. (Photo: M. DeFreese/CIMMYT)
Fodder for thought
The findings from this study also validate the use of genomic prediction as an important breeding tool to accelerate the development and improvement of dual-purpose maize varieties, according to CIMMYT Maize Breeder and first author of the study, M.T. Vinayan.
With the demand for animal feed increasing around the world, crop scientists and breeders have been exploring more efficient ways to improve animal feed quality in cereals without compromising grain yields for human consumption.
“Not all maize varieties have good stover quality, which is what we realized when we started working on this project. However, we discovered that there are a few which offer just as good quality as sorghum stover — a major source of livestock fodder particularly in countries such as India,” said Zaidi.
The publication of the study is a fitting tribute to the late Michael Blummel, who was a principal scientist and deputy program leader in the feed and forage development program at ILRI and co-author of this study.
“A couple of years back Dr Blummel relocated from the Hyderabad office at ILRI to its headquarters at Addis Ababa, but he used to frequently visit Hyderabad, and without fail met with us on each visit to discuss updates, especially about dual-purpose maize work. He was very passionate about dual-purpose maize research with a strong belief that the additional income from maize stover at no additional cost will significantly improve the income of maize farmers,” Zaidi said. “Michael was following this publication very closely because it was the first of its kind in terms of molecular breeding for dual purpose maize. He would have been very excited to see this published.”
A handful of improved maize seed from the drought-tolerant variety TAN 250, developed and registered for sale in Tanzania through CIMMYT’s Drought Tolerant Maize for Africa (DTMA) project, in partnership with Tanzanian seed company Tanseed International Limited. It is based on material from CIMMYT-Zimbabwe, CIMMYT-Mexico, and Tanzania. (Photo: Anne Wangalachi/CIMMYT)
The CGIAR Research Program on Maize (MAIZE) “uniquely fills a gap at the global and regional level, positioning it to continue catalyzing good science across borders,” according to a new report.
In addition to the exceptional quality of the program’s scientific inputs and the overall quality of its outputs, the reviewers note the program’s capacity to mobilize “stakeholders, resources and knowledge to rapidly deliver valuable solutions for a critical need.” The review authors specifically note MAIZE’s efforts towards halting the spread of maize lethal necrosis (MLN).
While, like all CGIAR Research Programs, MAIZE is due to conclude at the end of 2021, much of the program’s pioneering work will continue under new guises, such as the Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) project.
MAIZE — led by CIMMYT in partnership with the International Institute of Tropical Agriculture (IITA) — spearheads international, multi-stakeholder research for development to improve the livelihoods and food security of poor maize producers and consumers. It simultaneously seeks to strengthen the sustainability of maize-based agri-food systems. The program focuses on maize production in low- to middle-income countries — accounting for approximately two-thirds of global maize production — where the crop is “key to the food security and livelihoods of millions of poor famers,” according to the report.
“MAIZE provides a very robust platform for collaboration with our national partners, including private companies, community seed produces and other stakeholders. Through projects such as Drought Tolerant Maize for Africa (DTMA) and STMA, research has been able to provide innovative solutions to challenges that smallholder farmers face in their daily lives, such as drought, poor soils, and pests and diseases,” says Nteranya Sanginga, IITA’s Director General.
The review concludes that MAIZE “good management and governance practice are a strong foundation for the remainder of [the program’s] running.” The reviewers also recommend that the “excellent,” participatory application of theory of change thinking in the second phase of MAIZE be mainstreamed at the CGIAR system level moving forward. Key recommendations for the program’s final phase include:
Building on MAIZE’s “strong network of partners” by deepening these relationships into “multidirectional partnerships.”
Building on existing cross-cutting work on capacity development, climate change, gender and youth.
Diversifying and expanding MAIZE’s knowledge dissemination efforts to more deeply engage with include multiple and non-scientific audiences.
Scientists are calling for accelerated adoption of new hybrid maize varieties with resistance to maize lethal necrosis (MLN) disease in sub-Saharan Africa. In combination with recommended integrated pest management practices, adopting these new varieties is an important step towards safeguarding smallholder farmers against this devastating viral disease.
A new publication in Virus Research shows that these second-generation MLN-resistant hybrids developed by the International Maize and Wheat Improvement Center (CIMMYT) offer better yields and increased resilience against MLN and other stresses. The report warns that the disease remains a key threat to food security in eastern Africa and that, should containment efforts slacken, it could yet spread to new regions in sub-Saharan Africa.
The publication was co-authored by researchers at the International Maize and Wheat Improvement Center (CIMMYT), Kenya Agricultural and Livestock Research Organization (KALRO), the Alliance for a Green Revolution in Africa (AGRA), the African Agricultural Technology Foundation (AATF) and Aarhus University in Denmark.
CIMMYT technician Janet Kimunye (right) shows visitors a plant with MLN symptoms at the MLN screening facility in Naivasha, Kenya. (Photo: CIMMYT)
Stemming the panic
The first reported outbreak of MLN in Bomet County, Kenya in 2011 threw the maize sector into a panic. The disease caused up to 100% yield loss. Nearly all elite commercial maize varieties on the market at the time were susceptible, whether under natural of artificial conditions. Since 2012, CIMMYT, in partnership with KALRO, national plant protection organizations and commercial seed companies, has led multi-stakeholder, multi-disciplinary efforts to curb MLN’s spread across sub-Saharan Africa. Other partners in this endeavor include the International Institute of Tropical Agriculture (IITA), non-government organizations such as AGRA and AATF, and advanced research institutions in the United States and Europe.
In 2013 CIMMYT established an MLN screening facility in Naivasha. Researchers developed an MLN-severity scale, ranging from 1 to 9, to compare varieties’ resistance or susceptibility to the disease. A score of 1 represents a highly resistant variety with no visible symptoms of the disease, while a score of 9 signifies extreme susceptibility. Trials at this facility demonstrated that some of CIMMYT’s pre-commercial hybrids exhibited moderate MLN-tolerance, with a score of 5 on the MLN-severity scale. CIMMYT then provided seed and detailed information to partners for evaluation under accelerated National Performance Trials (NPTs) for varietal release and commercialization in Kenya, Tanzania and Uganda.
Between 2013 and 2014, four CIMMYT-derived MLN-tolerant hybrid varieties were released by public and private sector partners in East Africa. With an average MLN severity score of 5-6, these varieties outperformed commercial MLN-sensitive hybrids, which averaged MLN severity scores above 7. Later, CIMMYT breeders developed second-generation MLN-resistant hybrids with MLN severity scores of 3–4. These second-generation hybrids were evaluated under national performance trials. This led to the release of several hybrids, especially in Kenya, over the course of a five-year period starting in 2013. They were earmarked for commercialization in East Africa beginning in 2020.
Maize Lethal Necrosis (MLN) sensitive and resistant hybrid demo plots in Naivasha’s quarantine & screening facility (Photo: KIPENZ/CIMMYT)
Widespread adoption critical
The last known outbreak of MLN was reported in 2014 in Ethiopia, marking an important break in the virus’s spread across the continent. Up to that point, the virus had affected the Democratic Republic of the Congo, Kenya, Rwanda, Tanzania and Uganda. However, much remains to be done to minimize the possibility of future outbreaks.
“Due to its complex and multi-faceted nature, effectively combating the incidence, spread and adverse effects of MLN in Africa requires vigorous and well-coordinated efforts by multiple institutions,” said B.M. Prasanna, primary author of the report and director of the Global Maize Program at CIMMYT and of the CGIAR Research Program on Maize (MAIZE). Prasanna also warns that most commercial maize varieties being cultivated in eastern Africa are still MLN-susceptible. They also serve as “reservoirs” for MLN-causing viruses, especially the maize chlorotic mottle virus (MCMV), which combines with other viruses from the Potyviridae family to cause MLN.
“This is why it is very important to adopt an integrated disease management approach, which encompasses extensive adoption of improved MLN-resistant maize varieties, especially second-generation, not just in MLN-prevalent countries but also in the non-endemic ones in sub-Saharan Africa,” Prasanna noted.
The report outlines other important prevention and control measures including: the production and exchange of “clean” commercial maize seed with no contamination by MLN-causing viruses; avoiding maize monocultures and continuous maize cropping; practicing maize crop rotation with compatible crops, especially legumes, which do not serve as hosts for MCMV; and continued MLN disease monitoring and surveillance.
L.M. Suresh (center-right), Maize Pathologist at CIMMYT and Head of the MLN Screening Facility, facilitates a training on MLN with national partners. (Photo: CIMMYT)
Noteworthy wins
In addition to the development of MLN-resistant varieties, the fight against MLN has delivered important wins for both farmers and their families and for seed companies. In the early years of the outbreak, most local and regional seed companies did not understand the disease well enough to produce MLN-pathogen free seed. Since then, CIMMYT and its partners developed standard operating procedures and checklists for MLN pathogen-free seed production along the seed value chain. Today over 30 seed companies in Ethiopia, Kenya, Uganda, Rwanda and Tanzania are implementing these protocols on a voluntary basis.
“MLN represents a good example where a successful, large-scale surveillance system for an emerging transboundary disease has been developed as part of a rapid response mechanism led by a CGIAR center,” Prasanna said.
Yet, he noted, significant effort and resources are still required to keep the maize fields of endemic countries free of MLN-causing viruses. Sustaining these efforts is critical to the “food security, income and livelihoods of resource-poor smallholder farmers.
To keep up with the disease’s changing dynamics, CIMMYT and its partners are moving ahead with novel techniques to achieve MLN resistance more quickly and cheaply. Some of these innovative techniques include genomic selection, molecular markers, marker-assisted backcrossing, and gene editing. These techniques will be instrumental in developing elite hybrids equipped not only to resist MLN but also to tolerate rapidly changing climatic conditions.
Cover photo: Researchers and visitors listen to explanations during a tour of infected maize fields at the MLN screening facility in Naivasha, Kenya. (Photo: CIMMYT)
A farmer in the Ara district, in India’s Bihar state, applies NPK fertilizer, composed primarily of nitrogen, phosphorus and potassium. (Photo: Dakshinamurthy Vedachalam/CIMMYT)
An international team of scientists, led by the International Maize and Wheat Improvement Center (CIMMYT), has demonstrated how better nutrient management using digital tools, such as the Nutrient Expert decision support tool, can boost rice and wheat productivity and increase farmers’ income while reducing chemical fertilizer use and greenhouse gas emissions.
Reported today in Nature Scientific Reports, the results show how the farmer-friendly digital nutrient management tool can play a key role in fighting climate change while closing the yield gap and boosting farmers’ profits.
The researchers tested the Nutrient Expert decision tool against typical farmer fertilization practices extensively using approximately 1600 side-by side comparison trials in rice and wheat fields across the Indo-Gangetic Plains of India.
The study found that Nutrient Expert-based recommendations lowered global warming potential by 12-20% in wheat and by around 2.5% in rice, compared to conventional farmers’ fertilization practices. Over 80% of farmers were also able to increase their crop yields and incomes using the tool.
Agriculture is the second largest contributor of greenhouse gas emissions in India. To tackle these emissions, crop scientists have been working on new ways to make farming more nutrient- and energy-efficient. Of the many technologies available, improving nutrient-use-efficiency through balanced fertilizer application — which in turn reduces excess fertilizer application — is key to ensuring food security while at the same time contributing to the UN’s Sustainable Development Goals on climate change.
The work was carried out by CIMMYT in collaboration with farmers, and funded by the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS), the CGIAR Research Program on Wheat (WHEAT), and the Indian Council of Agricultural Research (ICAR). Scientists from the Borlaug Institute for South Asia (BISA), the International Rice Research Institute (IRRI), the Alliance of Bioversity International and CIAT, and the former International Plant Nutrition Institute (IPNI) also contributed to this study.
Researchers tested the Nutrient Expert decision tool against typical farmer fertilization practices extensively using approximately 1600 side-by side comparison trials in rice and wheat fields across the Indo-Gangetic Plains of India (Graphic: CIMMYT).
Precise recommendations
Nutrient Expert, which was launched back in 2013, works by analysing growing conditions, natural nutrients in the soil, and even leftover nutrients from previous crops to provide tailored fertilizer recommendations directly to farmers phones. The tool also complements the Government of India’s Soil Health Cards for balanced and precise nutrient recommendations in smallholder farmers’ fields.
Each farmer’s field is different, which is why blanket fertilizer recommendations aren’t always effective in producing better yields. By using nutrient management tools such as Nutrient Expert, farmers can obtain fertilizer recommendations specific to the conditions of their field as well as their economic resources and thus avoid under-fertilizing or over-fertilizing their fields.
“While efficient nutrient management in croplands is widely recognized as one of the solutions to addressing the global challenge of supporting food security in a growing global population while safeguarding planetary health, Nutrient Expert could be an important tool to implement such efficient nutrient management digitally under smallholder production systems,” said Tek Sapkota, CIMMYT climate scientist and first author of the study.
Sapkota also argues that adoption of the Nutrient Expert tool in rice-wheat systems of India alone could provide almost 14 million tonnes (Mt) of extra grain with 1.4 Mt less nitrogen fertilizer use, and a reduction of 5.3 Mt of carbon (CO2) emissions per year over current practices.
However, technological innovation alone will not achieve these positive outcomes.
“Given the magnitude of potential implications in terms of increasing yield, reducing fertilizer consumption and greenhouse gas emissions, governments need to scale-out Nutrient Expert-based fertilizer management through proper policy and institutional arrangements, especially for making efficient use of the nearly 200 million Soil Health Cards that were issued to farmers as part of the Soil Health mission of the Government of India,” said ML Jat, CIMMYT principal scientist and co-author of the study.
Byrd C. Curtis, director of CIMMYT’s Global Wheat Program from 1982 to 1988. (Photo: CIMMYT)
The International Maize and Wheat Improvement Center (CIMMYT) sadly notes the passing of Byrd C. Curtis, former Director of the Global Wheat Program, on January 7. He was 95 years old and lived in Fort Collins, Colorado, USA, with his wife Eloise Curtis.
From his studies at Oklahoma State University to retiring after a fruitful international career with Colorado State University, Cargill Inc. and CIMMYT, he never got weary of sharing his passion for breeding better, tastier and sturdier wheat to improve peoples’ livelihoods.
He was an innovator at heart and his legacy will live on through Colorado State University’s wheat breeding program and the many wheat varieties he developed. Not only did he start Colorado State University’s wheat breeding program in 1963, but he also ensured that the varieties that were bred by his team reflected the needs of humanity for decades to come, such as the hard, red winter wheat variety named after himself.
Curtis worked at CIMMYT from 1982 and 1988 as Director of the Global Wheat Program. Together with his team, he worked to position CIMMYT as the leading international research-for-development and breeding organization for wheat for years to come.
“Byrd was very keen to build oral communication skills of scientists, which has been very helpful to me,” said Ravi Singh, Head of Global Wheat Improvement at CIMMYT. “He also initiated the Turkey-CIMMYT-ICARDA International Winter Wheat Improvement Partnership’s (IWWIP) winter wheat breeding program and even worked there in Turkey in his final year with CIMMYT to ensure it would take off well.”
Byrd was instrumental and showed tremendous foresight. IWWIP’s establishment in Turkey became first major breeding program within CGIAR that was hosted by a national program. He strongly supported the creation of the Wide Crossing Program. The synthetic wheat varieties developed in this program have had global impact on wheat improvement.
Aside from his remarkable technical legacy, Byrd had a knack for choosing the right people for the job. In the six years as Director of the Global Wheat Program, he hired scientists who held major roles in global wheat improvement: Ravi Singh, Distinguished Scientist and Head of Global Wheat Improvement; Wolfgang Pfeiffer, former leader of spring bread wheat, durum wheat, and triticale crop improvement; and Hans Braun, Director of the Global Wheat Program from 2004 to 2020.
“Byrd not only initiated the winter wheat program,” said former Global Wheat Program Director Hans Braun, who was hired by Byrd in 1983. “He was also director when the tropical wheat program was implemented in Thailand.” This program’s work increased yields up to 1.5 tons per hectare but ultimately did not convince Thai farmers. Nevertheless, Braun said, “One of the oddest experiences I’ve had was to see our winter wheat material from Turkey grown in the Thai jungle!”
After retiring from his professional life in 1991, Curtis and his wife Eloise moved back to Fort Collins, where his career started in the 1960s and where he will be remembered by his townspeople — and fellow athletes and gym-goers — for his determination and active lifestyle.
The CIMMYT community sends its deepest sympathies and wishes for peace to the Curtis family.
The International Maize and Wheat Improvement Center (CIMMYT) is offering a new set of elite, improved maize hybrids to partners in eastern Africa and similar agro-ecological zones. National agricultural research systems (NARS) and seed companies are invited to apply for licenses to pursue national release of, and subsequently commercialize, these new hybrids, in order to bring the benefits of the improved seed to farming communities.
