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BISA Jabalpur team gathers for a celebration

Celebrating 10 years of the Borlaug Institute for South Asia

Written by Richa Sharma Puri on . Posted in News.

BISA and CIMMYT gather for a virtual 10 year celebration
BISA and CIMMYT gather for a virtual 10 year celebration.

A decade ago, a foundation was laid with a vision to secure food, nutrition, livelihoods, and the environment in South Asia. The Borlaug Institute of South Asia (BISA) was formed and the principles were set following the path of Norman Borlaug to translate the agrarian challenges into opportunities by collaborating with the International Maize and Wheat Improvement Center (CIMMYT) and the Indian Council of Agricultural Research (ICAR). BISA was established as an independent, non-profit research organization.

BISA anniversary Borlaug statue

To commemorate the 10th anniversary of BISA, Bram Govaerts, Director General, CIMMYT-BISA, gathered BISA staff for a virtual celebration on 5 October 2021. He congratulated BISA colleagues and said “[
] BISA has continued to expand Norman Borlaug’s vision and legacy. It has […] been committed and achieved excellence in science, seeds and partnerships by touching lives of millions of farmers and consumers.”

“Perhaps one of the most impactful outcomes of BISA’s work has been its contribution to build a strong and wide network for evaluating and disseminating new high yielding and climate-resilient wheat varieties for southern Asia in close partnership with ICAR and national agricultural research systems. CIMMYT-BISA has not only contributed towards this but will also make sure that India’s farmers are the happiest. Efforts will and have been made towards their income generation, livelihood for families, a clean environment and building of future agricultural resilience,” he added.

BISA milestones and achievements

Pramod Aggarwal, Regional Program Leader, BISA and CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS), gave suggestions for the way forward and BISA’s future collaborations. He said, “It’s time to strengthen BISA and further expand it to other South Asian countries.”

Arun Joshi, Managing Director, BISA, spoke about the achievements of BISA throughout the last decade and about the establishment of the ‘Farms of the Future’. “BISA farms are equipped with state-of-the-art technology. BISA’s no residue burning, efficient resource management, precision phenotyping, climate resilient germplasm, quality seed and capacity development activities are just a few examples of BISA’s successful programs,” he said.

“BISA has been scaling climate smart agriculture technologies not only in Indian villages but to other countries of South Asia, as well, and has supported African colleagues in capacity development.” Joshi recalled the support provided by numerous funding partners, by ICAR (Government of India), state governments (Punjab, Bihar, Madhya Pradesh, Maharashtra), other governmental institutions, CIMMYT’s Board of Trustees and Management Committee team members and different research programs to strengthen BISA.

BISA Ludhiana team gathers for a celebration
BISA’s Ludhiana team gathers for a celebration

Celebrations galore  

In addition to the virtual celebration with the leadership of BISA and CIMMYT, numerous teams scattered across India celebrated the success and fruitful journey of BISA. The teams at BISA farms in Jabalpur (Madhya Pradesh), Pusa (Bihar), and Ludhiana (Punjab) marked the occasion by gathering at a COVID-19-appropriate distance and paid regards to Norman Borlaug and spoke about the objectives and vision of BISA.

BISA Jabalpur team gathers for a celebration
BISA’s Jabalpur team gathers for a celebration

The New Delhi team celebrated by garlanding the statue of Borlaug, that stands in front of the office of BISA based at the National Agriculture Science Complex (NASC).

Capturing the decade-long journey

The ten-year journey of BISA is captured in “A Decade of Research in Borlaug Institute for South Asia (BISA) 2011-2021,” a research highlights report that was unveiled during the virtual celebration and that will soon be available online. Arun Joshi explained that the document encapsulates the spirit of BISA and its achievements throughout the last ten years. Its sixteen themes define the work of BISA and its reach across South Asia.

Special celebratory BISA report to mark its 10 years of success

The report also informs of BISA’s outreach activities throughout the last decade and its impact on climate resilient agriculture. Themes such as ‘Managing Rice Residue Burning’, ‘Climate Smart Village Approach’, ‘Precision Phenotyping in Wheat Breeding’, ‘Developing Improved Crop Insurance Products’, ‘Mainstreaming Gender in Climate-Resilient Agriculture’ reveal how BISA scaled up these approaches with its advanced technology mechanisms. In addition, every theme captures information related to funding and research partners.

Overall, the ten-year report is a robust document which showcases how millions of farmers in South Asia have benefitted from the strong scientific partnership of BISA and national programs.

Narain Dhar

Written by Leslie DomĂ­nguez on . Posted in Uncategorized.

Narain Dhar is a research fellow working with CIMMYT’s Global Wheat program and CGIAR Research Program on Wheat (WHEAT). His recent work is on charaterization and evaluation of a unique set of germplasm lines for abiotic stress.

In the last four decades, wheat blast has appeared in South America, Asia an Africa. (Video: Alfonso Cortés/CIMMYT)

Taming wheat blast

Written by Rodrigo Ordóñez on . Posted in Features.

As wheat blast continues to infect crops in  countries around the world, researchers are seeking ways to stop its spread. The disease — caused by the Magnaporthe oryzae pathotype Triticum — can dramatically reduce crop yields, and hinder food and economic security in the regions in which it has taken hold.

Researchers from the International Maize and Wheat Improvement Center (CIMMYT) and other international institutions looked into the potential for wheat blast to spread, and surveys existing tactics used to combat it. According to them, a combination of methods — including using and promoting resistant varieties, using fungicides, and deploying strategic agricultural practices — has the best chance to stem the disease.

The disease was originally identified in Brazil in 1985. Since then, it has spread to several other countries in South America, including Argentina, Bolivia and Paraguay. During the 1990s, wheat blast impacted as many as three million hectares in the region. It continues to pose a threat.

Through international grain trade, wheat blast was introduced to Bangladesh in 2016. The disease has impacted around 15,000 hectares of land in the country and reduced average yields by as much as 51% in infected fields.

Because the fungus’ spores can travel on the wind, it could spread to neighboring countries, such as China, India, Nepal and Pakistan — countries in which wheat provides food and jobs for billions of people. The disease can also spread to other locales via international trade, as was the case in Bangladesh.

“The disease, in the first three decades, was spreading slowly, but in the last four or five years its pace has picked up and made two intercontinental jumps,” said Pawan Singh, CIMMYT’s head of wheat pathology, and one of the authors of the recent paper.

In the last four decades, wheat blast has appeared in South America, Asia an Africa. (Video: Alfonso Cortés/CIMMYT)

The good fight

Infected seeds are the most likely vector when it comes to the disease spreading over long distances, like onto other continents. As such, one of the key wheat blast mitigation strategies is in the hands of the world’s governments. The paper recommends quarantining potentially infected grain and seeds before they enter a new jurisdiction.

Governments can also create wheat “holidays”, which functionally ban cultivation of wheat in farms near regions where the disease has taken hold. Ideally, this would keep infectable crops out of the reach of wheat blast’s airborne and wind-flung spores. In 2017, India banned wheat cultivation within five kilometers of Bangladesh’s border, for instance. The paper also recommends that other crops — such as legumes and oilseed — that cannot be infected by the wheat blast pathogen be grown in these areas instead, to protect the farmers’ livelihoods.

Other tactics involve partnerships between researchers and agricultural workers. For instance, early warning systems for wheat blast prediction have been developed and are being implemented in Bangladesh and Brazil. Using weather data, these systems alert farmers when the conditions are ideal for a wheat blast outbreak.

Researchers are also hunting for wheat varieties that are resistant to the disease. Currently, no varieties are fully immune, but a few do show promise and can partially resist the ailment depending upon the disease pressure. Many of these resistant varieties have the CIMMYT genotype Milan in their pedigree.

“But the resistance is still limited. It is still quite narrow, basically one single gene,” Xinyao He, one of the co-authors of the paper said, adding that identifying new resistant genes and incorporating them into breeding programs could help reduce wheat blast’s impact.

Wheat spikes damaged by wheat blast. (Photo: Xinyao He/CIMMYT)
Wheat spikes damaged by wheat blast. (Photo: Xinyao He/CIMMYT)

The more the merrier

Other methods outlined in the paper directly involve farmers. However, some of these might be more economically or practically feasible than others, particularly for small-scale farmers in developing countries. Wheat blast thrives in warm, humid climates, so farmers can adjust their planting date so the wheat flowers when the weather is drier and cooler. This method is relatively easy and low-cost.

The research also recommends that farmers rotate crops, alternating between wheat and other plants wheat blast cannot infect, so the disease will not carry over from one year to the next. Farmers should also destroy or remove crop residues, which may contain wheat blast spores. Adding various minerals to the soil, such as silicon, magnesium, and calcium, can also help the plants fend off the fungus. Another option is induced resistance, applying chemicals to the plants such as jasmonic acid and ethylene that trigger its natural resistance, much like a vaccine, Singh said.

Currently, fungicide use, including the treatment of seeds with the compounds, is common practice to protect crops from wheat blast. While this has proven to be somewhat effective, it adds additional costs which can be hard for small-scale farmers to swallow. Furthermore, the pathogen evolves to survive these fungicides. As the fungus changes, it can also gain the ability to overcome resistant crop varieties. The paper notes that rotating fungicides or developing new ones — as well as identifying and deploying more resistant genes within the wheat — can help address this issue.

However, combining some of these efforts in tandem could have a marked benefit in the fight against wheat blast. For instance, according to Singh, using resistant wheat varieties, fungicides, and quarantine measures together could be a time-, labor-, and cost-effective way for small-scale farmers in developing nations to safeguard their crops and livelihoods.

“Multiple approaches need to be taken to manage wheat blast,” he said.

Climate-smart strategy for weed management proves to be extremely effective

Written by Sarah McLaughlin on . Posted in Publications.

Rice-wheat cropping rotations are the major agri-food system of the Indo-Gangetic Plains of South Asia, occupying the region known as the “food basket” of India. The continuous rice-wheat farming system is deceptively productive, however, under conventional management practices.

Over-exploitation of resources leaves little doubt that this system is unsustainable, evidenced by the rapid decline in soil and water resources, and environmental quality. Furthermore, continuous cultivation of the same two crops over the last five decades has allowed certain weed species to adapt and proliferate. This adversely affects resource-use efficiency and crop productivity, and has proven to negatively influence wheat production in the Western Indo-Gangetic Plains under conventional wheat management systems.

Studies suggest weed infestations could reduce wheat yields by 50-100% across the South Asian Indo-Gangetic Plains. Globally, yield losses from weeds reach 40%, which is more than the effects of diseases, insects, and pests combined.

Herbicides are not just expensive and environmentally hazardous, but this method of chemical control is becoming less reliable as some weeds become resistant to an increasing number common herbicides. Considering the food security implications of weed overgrowth, weed management is becoming increasingly important in future cropping systems.

How can weeds be managed sustainably?

Climate-smart agriculture-based management practices are becoming a viable and sustainable alternative to conventional rice-wheat cropping systems across South Asia, leading to better resource conservation and yield stability. In addition to zero-tillage and crop residue retention, crop diversification, precise water and nutrient management, and timing of interventions are all important indicators of climate-smart agriculture.

In a recently published 8-year study, scientists observed weed density and diversity under six different management scenarios with varying conditions. Conditions ranged from conventional, tillage-based rice-wheat system with flood irrigation (scenario one), to zero-tillage-based maize-wheat-mung bean systems with subsurface drip irrigation (scenario 6). Each scenario increased in their climate-smart agriculture characteristics all the way to fully climate-smart systems.

At the end of 8 years, scenario six had the lowest weed density, saw the most abundant species decrease dramatically, and seven weed species vanish entirely.  Scenario one, with conventional rice-wheat systems with tillage and flooding, experienced the highest weed density and infestation. This study highlights the potential of climate-smart agriculture as a promising solution for weed suppression in northwestern India.

Read the full study: Climate-smart agriculture practices influence weed density and diversity in cereal-based agri-food systems of western Indo-Gangetic plains

Cover image: Farmer weeding in a maize field in India. (Photo: M. Defreese/CIMMYT)

Gyanendra Pratap Singh (center), Director of ICAR-IIWBR, presents at the 60th All India Wheat and Barley Research Workers’ Meet. (Photo: Courtesy of ICAR-IIWBR)

CIMMYT scientists join 60th All India Wheat and Barley Research Workers’ Meet

Written by Madeline Dahm on . Posted in News.

Gyanendra Pratap Singh (center), Director of ICAR-IIWBR, presents at the 60th All India Wheat and Barley Research Workers’ Meet. (Photo: Courtesy of ICAR-IIWBR)
Gyanendra Pratap Singh (center), Director of ICAR-IIWBR, presents at the 60th All India Wheat and Barley Research Workers’ Meet. (Photo: Courtesy of ICAR-IIWBR)

The International Maize and Wheat Improvement Center’s (CIMMYT) legacy of work with the Indian Centre for Agricultural Research (ICAR) has once again produced more successful collaborations this year. This solid partnership resulted in the release of new varieties poised to bring new, superior yielding, disease-resistant, high-quality wheat varieties suitable for different production environments to Indian farms.

The National Variety Release Committee announced the release of nine new varieties at the 60th All India Wheat and Barley Research Workers’ Virtual Meet on August 23–24, 2021, hosted by the Indian Institute of Wheat and Barley Research (IIWBR) of ICAR. Of the nine new varieties identified, five were selected by national partners from CIMMYT international trials and nurseries.

At the event, ICAR-IIWBR director Gyanendra Pratap (GP) Singh highlighted the impressive growth trajectory of India’s wheat production, estimated at 109.52 million tons of wheat harvested in 2021, a figure which was 86.53 million tons in 2015 and less than 60 million tons in 1991. Singh highlighted that this success is dependent upon the deployment of superior wheat varieties, bridging yield and information gaps, strengthened seed value chain, supportive government policies and, of course, farmer support to adopt new varieties and technologies.

The CIMMYT-derived varieties announced at the meeting include DBW296, DBW327, DBW332, HUW296 and JKW261. A few days earlier, variety PBW869 was released by the Punjab Agricultural University for growing in Punjab State under conservation agriculture practices.

“An innovative and powerful feature of ICAR-CIMMYT collaboration has been the introduction of long-term (10-month) rotational involvement of Indian young scientists in CIMMYTs breeding program at Mexico as well as in wheat blast screening in Bolivia,” said Arun Joshi, CIMMYT Regional Representative for Asia and Managing Director, Borlaug Institute for South Asia (BISA). “In this way, the breeding program of CIMMYT is an excellent example of joint breeding program with national institutions.”

At the 60th All India Wheat and Barley Research Workers’ Meet, participants highlighted new varieties, production growth and strengthened collaboration. (Photo: CIMMYT)
At the 60th All India Wheat and Barley Research Workers’ Meet, participants highlighted new varieties, production growth and strengthened collaboration. (Photo: CIMMYT)

Beyond expectations

In addition to these important new wheat varieties, some CIMMYT-derived wheat varieties that were released in recent years have now been deemed suitable for regions beyond their initial region of cultivation, showing wide adaptation and yield stability.

Wheat variety DBW222, released in 2020 for the northwestern plain zone, has now been deemed suitable for cultivation in the northeastern plain zone. Similarly, DBW187, which was initially released for the northeastern plain zone, and then for northwestern plain zone as well for early sowing, is now also extended for sowing in the central zone, together representing 25 million hectares of the 31 million hectares of wheat grown in India.

“Farmers prefer these types of varieties that give them flexibility during sowing time, and have high, stable yields, and disease resistance,” GP Singh said at the meeting.

A major achievement discussed at this year’s event was that three of the new varieties — DBW187, DBW303 and DBW222 — achieved record-high demand in Breeders Seed Indent, with first, second and seventh ranks, respectively. This is a reflection and indirect measure of popularity and demand for a variety. IIWBR’s innovative strategy to implement pre-release seed multiplication and create demand for seeds from new varieties has led to a faster turnover of improved varieties.

According to Ravi Singh, Distinguished Scientist and Head of Global Wheat Improvement at CIMMYT, the collaborators are “further expanding our partnership through the support from the Accelerating Genetic Gains in Maize and Wheat (AGG) and zinc-mainstreaming projects, to expand testing of larger sets of elite lines in targeted populations of environments of the four South Asian countries where various IIBWR-affiliated institutions shall expand testing in the 2021–22 crop season.” CIMMYT looks forward to continuing ongoing and new collaborations with the ICAR-IIWBR programs to deliver even faster genetic gain for yield and grain zinc levels in new varieties, he explained.

Speaking during the meeting Alison Bentley, Director of CIMMYT’s Global Wheat Program, highlighted the collaborative efforts underway as part of the AGG project to accelerate breeding progress. “Innovations and discoveries in breeding approaches are being rapidly made — with further investment needed — to quickly and equitably accumulate and deploy them to farmers,” she said.

Agricultural scientist Balwinder Singh awarded ‘Alumnus of the Year’ by a prestigious Australian university

Written by Bea Ciordia on . Posted in In the media.

The Indian researcher leads CIMMYT’s environmental analytics work in South Asia, combining field experimentation, participatory engagement and cropping systems modelling to address the region’s productivity and sustainability challenges in cereal systems.

Charles Sturt University (CSU) awarded him with the 2021 Alumnus of the Year title in Professional Achievement (Research) as part of its Foundation Day celebrations on July 21.

Read more: https://www.sbs.com.au/language/english/audio/agricultural-scientist-balwinder-singh-awarded-alumnus-of-the-year-by-a-prestigious-australian-university

India’s Groundwater Is In Trouble. And It Could Cause a Food Shortage for Millions By 2025, Study Finds

Written by Bea Ciordia on . Posted in In the media.

A recent study of the groundwater in India revealed that, by 2025, large areas of the north-western and southern parts of the country will have “critically low groundwater availability”, leading to a decrease in cropping that will ultimately cause an imbalance in the food security for millions.

Read more: https://www.greenqueen.com.hk/indias-groundwater-is-in-trouble-and-it-could-cause-a-food-shortage-for-millions-by-2025-study-finds/

Seeding happy, cleaning air: Farmers adopting non-burn tech give hope

Written by Bea Ciordia on . Posted in In the media.

A paper titled “Fields on fire: Alternatives to crop residue burning in India” and published in the prestigious journal Science found that working with the Happy Seeder—a machine that cuts and lifts the paddy straw while simultaneously sowing the wheat crop and spreading the cut straw as mulch over fields—is not just the least polluting, but also the most scalable solution that can be adopted by farmers en masse.

Read more: https://www.downtoearth.org.in/blog/agriculture/seeding-happy-cleaning-air-farmers-adopting-non-burn-tech-give-hope-77729

Farmer Bhima Bhandari returns home after field work carrying her 7-month-old son Sudarsan on her back in Bardiya, Nepal. (Photo: Peter Lowe/CIMMYT)

Capturing a clearer picture

Written by Madeline Dahm on . Posted in Features.

A new guidance note shines a brighter light on the role of women in wheat-based farming systems in the Indo-Gangetic Plains and provides actionable recommendations to researchers, rural advisory services, development partners, and policymakers on how to support working communities more effectively and knowledgeably. The publication, Supporting labor and managerial feminization processes in wheat in the Indo-Gangetic Plains: A guidance note, is based on a literature review, including work by researchers at and associated with the International Maize and Wheat Improvement Center (CIMMYT) and Pandia Consulting.

“Feminization of agriculture is happening in wheat-based systems in South Asia, but these processes are under-researched and their implications are poorly understood. This guidance note, focusing on Bangladesh, India, Nepal and Pakistan, highlights some of the commonalities and differences in feminization processes in each country,” said Hom Gartaula, gender and social inclusion specialist at CIMMYT, and one of the lead authors of the study.

This eight-page publication is based on research funded by the CGIAR Collaborative Platform on Gender Research, the International Development Research Centre (IDRC) and the CGIAR Research Program on Wheat (WHEAT).

How great innovations miss critical opportunities by ignoring women

Even the most well-intentioned agricultural interventions can have external costs that can hinder economic development in the long run. The guidance note cites a study that reveals, during India’s Green Revolution, that the introduction of high-yielding varieties of wheat actually “led to a significant decline in women’s paid hired labor because wheat was culturally defined as suited to male laborers. Male wages rose, and women’s wages fell.” Importantly, most women did not find alternative sources of income.

This is not to say that the high-yielding varieties were a poor intervention themselves; these varieties helped India and Pakistan stave off famine and produce record harvests. Rather, the lack of engagement with social norms meant that the economic opportunities from this important innovation excluded women and thus disempowered them.

Wheat farmers during a field day in Odisha, India. (Photo: Wasim Iftikar/CSISA)
Wheat farmers during a field day in Odisha, India. (Photo: Wasim Iftikar/CSISA)

A closer look at labor feminization and managerial feminization processes

The guidance note points out that it is not possible to generalize across and within countries, as gender norms can vary, and intersectionalities between gender, caste and other identities have a strong impact on women’s participation in fieldwork. Nevertheless, there seem to be some broad trends. The fundamental cross-cutting issue is that women’s contribution to farming is unrecognized, regardless of the reality of their work, by researchers, rural advisory services and policymakers. A second cross-cutting issue is that much research is lodged in cultural norms that reflect gender biases, rather than challenge them, through careful, non-judgemental quantitative and qualitative research.

In Bangladesh, women’s participation in agriculture is slowly increasing as off-farm opportunities decline, though it remains limited compared to women in the other countries examined. Hired agricultural work is an important income source for some women. Emerging evidence from work from CSISA and CIMMYT shows that women are becoming decision-makers alongside their husbands in providing mechanization services. Nevertheless, technical, economic and cultural barriers broadly constrain women’s effective participation in decision-making and fieldwork.

In India, agricultural labor is broadly feminizing as men take up off-farm opportunities and women take up more responsibilities on family farms and as hired laborers. Yet information derived from CIMMYT GENNOVATE studies cited in the guidance note shows that external actors, like rural advisory services and researchers, frequently make little effort to include women in wheat information dissemination and training events despite emerging evidence of women taking managerial roles in some communities. Some researchers and most rural advisory services continue to work with outdated and damaging assumptions about “who does the work” and “who decides” that are not necessarily representative of farmers’ realities.

Women in Nepal provide the bulk of the labor force to agriculture.  With men migrating to India and the Gulf countries to pursue other opportunities, some women are becoming de-facto heads of households and are making more decisions around farming. Still, women are rarely targeted for trainings in on-farm mechanization and innovation. However, there is evidence that simple gender-equality outreach from NGOs and supportive extension agents can have a big impact on women’s empowerment, including promoting their ability to innovate in wheat.

In Pakistan, male out-migration to cities and West Asia is a driving force in women’s agricultural involvement. Significant regional differences in cultural norms mean that women’s participation and decision-making varies across the country, creating differences regarding the degree to which their increased involvement is empowering. As in the other three countries, rural advisory services primarily focus on men. This weakens women’s ability to make good farming decisions and undermines their voice in intra-household decision-making.

Women in Nepal using agricultural machinery. (Photo: Peter Lowe/CIMMYT)
Women in Nepal using agricultural machinery. (Photo: Peter Lowe/CIMMYT)

Recommendations

Research should be conducted in interdisciplinary teams and mindsets, which helps design both qualitative and quantitative research free of assumptions and bias. Qualitative and quantitative researchers need to better document the reality of women’s agricultural work, both paid and unpaid.

National agricultural research systems, rural advisory services and development partners are encouraged to work with local partners, including women’s groups and NGOs, to develop gender-transformative approaches with farmers. Services must develop more inclusive criteria for participation in field trials and extension events to invite more women and marginalized communities.

Policymakers are invited to analyze assumptions in existing policies and to develop new policies that better reflect women’s work and support women’s decision-making in the agricultural sector. Researchers should provide policymakers with more appropriate and up-to-date gender data to help them make informed decisions.

These recommendations name a few of many suggestions presented in the guidance note that can ensure agricultural feminization process are positive forces for everyone involved in wheat systems of the Indo-Gangetic Plains. As a whole, acknowledging the reality of these changes well underway in South Asia — and around the world — will not just empower women, but strengthen wheat-based agri-food systems as a whole.

Cover photo: Farmer Bhima Bhandari returns home after field work carrying her 7-month-old son Sudarsan on her back in Bardiya, Nepal. (Photo: Peter Lowe/CIMMYT)

Wheat stalks grow in a in India. (Photo: Saad Akhtar)

A challenge solved

Written by Emma Orchardson on . Posted in News.

Wheat stalks grow in a in India. (Photo: Saad Akhtar)
Wheat stalks grow in a field in India. (Photo: Saad Akhtar)

For scientists, determining how best to increase wheat yields to meet food demand is a persistent challenge, particularly as the trend toward sustainably intensifying production on agricultural lands grows.

The United Nations projects that the current global population of 7.6 billion will increase to more than 9.8 billion by 2050, making higher grain yield potential vital, particularly as climate instability increases due to global warming. International efforts are also focused on meeting the Zero Hunger target detailed in the UN Sustainable Development Goals before they expire in 2030.

Now, a new landmark research survey on the grain yield potential and climate-resilience of bread wheat (Triticum aestivum L.) has brought scientists a few strides closer to meeting their ambitions.

Grain yield has traditionally been an elusive trait in genomic wheat breeding because of its quantitative genetic control, which means that it is controlled by many genomic regions with small effects.

Challenges also include a lack of good understanding about the genetic basis of grain yield, inconsistent grain yield quantitative trait loci identified in different environments, low heritability of grain yield across environments and environment interactions of grain yield.

To dissect the genetic architecture of wheat grain yield for the purposes of the research, which appeared in Scientific Reports, researchers implemented a large-scale genome-wide association study based on 100 datasets and 105,000 grain yield observations from 55,568 wheat breeding lines developed by the International Maize and Wheat Improvement Center (CIMMYT).

They evaluated the lines between 2003 and 2019 in different sites, years, planting systems, irrigation systems and abiotic stresses at CIMMYT’s primary yield testing site, the Norman E. Borlaug Experimental Research Station, Ciudad Obregon, Mexico, and in an additional eight countries — including Afghanistan, India and Myanmar — through partnerships with national programs.

The researchers also generated the grain-yield associated marker profiles and analyzed the grain-yield favorable allele frequencies for a large panel of 73,142 wheat lines, resulting in 44.5 million data points. The marker profiles indicated that the CIMMYT global wheat germplasm is rich in grain yield favorable alleles and is a trove for breeders to choose parents and design strategic crosses based on complementary grain yield alleles at desired loci.

“By dissecting the genetic basis of the elusive grain-yield trait, the resources presented in our study provide great opportunities to accelerate genomic breeding for high-yielding and climate-resilient wheat varieties, which is a major objective of the Accelerating Genetic Gain in Maize and Wheat project,” said CIMMYT wheat breeder Philomin Juliana.

“This study is unique and the largest-of-its-kind focusing on elucidating the genetic architecture of wheat grain yield,” she explained, “a highly complex and economically important trait that will have great implications on future diagnostic marker development, gene discovery, marker-assisted selection and genomic-breeding in wheat.”

Currently, crop breeding methods and agronomic management put annual productivity increases at 1.2% a year, but to ensure food security for future generations, productivity should be at 2.4% a year.

So, the extensive datasets and results presented in this study are expected to provide a framework for breeders to design effective strategies for mitigating the effects of climate change, while ensuring food-sustainability and security.

Joe Dale

Written by Emma Orchardson on . Posted in Uncategorized.

Joe Dale is a regional program manager with CIMMYT’s Sustainable Agrifood Systems (SAS) program, based in Nepal. He provides management support to increase the impact and outcomes of CIMMYT’s research and development work in South Asia.

Dale holds a PhD in Agricultural Education from Iowa State University and has more than 15 years of agricultural development implementation experience across six countries.