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Mobilizing seed bank diversity for wheat improvement

During centrifugation, the emulsion for DNA extraction separates into two distinct phases. Chloroform:octanol is more dense than water solutions, so it forms the lower (green) layer. It is also more chemically attractive to molecules such as proteins and polysaccharides. These are thus separated out from the DNA, which is contained in the upper aqueous phase. This clear solution is carefully transferred to fresh centrifuge tubes using a pipette. Photo credit: CIMMYT. See the "DNA extraction" set that this photo is part of for more information and images.By Mike Listman/CIMMYT

EL BATAN, Mexico (January 12, 2016)-A recent study by a global team of researchers from CIMMYT, ICARDA, and the Global Crop Diversity Trust has uncovered a treasure trove of wheat genetic diversity to address drought and rising temperatures—constraints that cut harvests for millions of farmers worldwide and which are growing more severe with each passing year.

The team studied the molecular diversity of 1,423 spring bread wheat accessions that represent major global production environments, using high quality genotyping-by-sequencing (GBS) loci and gene-based markers for various adaptive and quality traits.

They discovered thousands of new DNA marker variations in landraces known to be adapted to drought (1,273 novel GBS SNPs) and heat (4,473 novel GBS SNPs), opening the potential to enrich elite breeding lines with novel alleles for drought and heat tolerance. New allelic variation for vernalization and glutenin genes was also identified in 47 landraces from Afghanistan, India, Iran, Iraq, Pakistan, Turkmenistan, and Uzbekistan.

Mean diversity index (DI) estimates revealed that synthetic hexaploids—created by crossing wheat’s wild grass ancestor Aegilops tauschii with durum wheat—are genetically more diverse than elite lines (DI = 0.267) or landraces (DI = 0.245). Lines derived from such crosses are already playing an increasingly important role in global and national breeding programs.

Identifying and mobilizing useful genetic variation from germplasm banks to breeding programs is key to sustaining crop genetic improvement.  The results have already been used to select 200 diverse germplasm bank accessions for pre-breeding and allele mining of candidate genes associated with drought and heat stress tolerance, thus channeling novel variation into breeding pipelines.

Published in the paper Exploring and Mobilizing the Gene Bank Biodiversity for Wheat Improvement, the research is part of CIMMYT’s ongoing Seeds of Discovery project visioning towards the development of high yielding wheat varieties that address future challenges from climate change.

NAAS fellow M.L. Jat talks about climate change, sustainable agriculture

By Katelyn Roett/CIMMYT

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M.L. Jat observing wheat germination in a zero-till field in Haryana, India. Photo: DK Bishnoi/CIMMYT

EL BATAN, Mexico (December 18,2016)- CIMMYT senior scientist M.L. Jat has received India’s National Academy of Agricultural Sciences (NAAS) fellowship in Natural Resource Management for his “outstanding contributions in developing and scaling” conservation agriculture-based management technologies for predominant cereal-based cropping systems in South Asia.

Jat’s research on conservation agriculture (CA) – sustainable and profitable agriculture that improves livelihoods of farmers via minimal soil disturbance, permanent soil cover, and crop rotations – has guided improvements in soil and environmental health throughout South Asia. His work has led to policy-level impacts in implementing CA practices such as precision land leveling, zero tillage, direct seeding, and crop residue management, and he has played a key role in building the capacity of CA stakeholders throughout the region.

Sustainable innovation, including climate-smart agriculture, were a major theme at the COP21 climate talks .

Clone of magic wheat disease-resistance gene sheds light on new defense mechanism

By Mike Listman/CIMMYT

EL BATAN, Mexico (November 13, 2015)- Scientists have sequenced and described a gene that can help wheat to resist four serious fungal diseases, potentially saving billions of dollars in yearly grain

APR-resistance-mr

A resistant wheat line surrounded by susceptible lines infected by rust disease (photo: CIMMYT/Julio Huerta).

losses and reducing the need for farmers to use costly fungicides, once the gene is bred into high-yielding varieties.

A global research team isolated the wheat gene Lr67, revealing how it hampers fungal pathogen growth through a novel mechanism.

The study, which was published in Nature Genetics on 9 November, involved scientists from the International Maize and Wheat Improvement Center (CIMMYT), the Chinese Academy of Agricultural Sciences (CAAS), Mexico’s National Institute of Forestry, Agriculture, and Livestock Research (INIFAP), the Norwegian University of Life Sciences and scientists from Australia, including the Commonwealth Scientific and Industrial Research Organisation (CSIRO), the University of Newcastle, and the University of Sydney.

According to Ravi Singh, CIMMYT distinguished scientist, wheat breeder, and co-author of the new study, Lr67 belongs to a group of three currently-known “magic” genes that help wheat to resist all three wheat rusts and powdery mildew, a disease that attacks wheat in humid temperate regions. The genes act in different ways but all slow — rather than totally stopping — disease development. When combined with other such partial resistance genes through breeding, they provide a strong, longer-lasting protection for plants, boosting food security.

To read more about Lr67‘s cloning and resistance type, click here.

$20 million in grants for research to boost wheat yield potential

Wheat Remote Sensing-flip

Photo: Alfredo Saénz/CIMMYT

By Mike Listman/CIMMYT

COLLEGE STATION, Texas (October 30, 2015)- The International Wheat Yield Partnership (IWYP) will recommend around US $20 million in grants awards from its funders for a selection of 8 research projects by leading institutes to increase wheat’s photosynthetic and energy-use efficiency and harness the genetics behind key components of yield.

Resulting from a January 2015 call for competitive research proposals, the projects fit the IWYP goal of raising the genetic yield potential of wheat by up to 50% in the coming 20 years.

To read more about the projects, IWYP, and the Initiative’s funders, click here.

Kenya wheat breeders win the 2015 BGRI Gene Stewardship Award

By Julie Mollins/CIMMYT

NAIROBI, Kenya (October 8, 2015)- Plant pathologist Ruth Wanyera and wheat breeders Godwin Macharia and Peter Njau of the Kenya Agriculture and Livestock Research Organization (KALRO) received the 2015 Gene Stewardship Award at the Borlaug Global Rust Initiative Workshop (BGRI) in Sydney, Australia.

“The KALRO team has done an outstanding job – their work has had significant global impact by accelerating the capacity of developing countries to protect themselves against this swift-moving and devastating disease,” said Sridhar Bhavani, a wheat breeder who leads the International Maize and Wheat Improvement Center (CIMMYT) stem-rust screening nurseries in East Africa and nominated the team for the award.

WHEAT and CIMMYT Remember Vital Legacy of Gender Specialist Paula Kantor

By Mike Listman/CIMMYT

EL AIP MWG_ Paula_2-cropBATAN, Mexico (May 15,2015) CIMMYT is sad to announce the tragic death of our friend and respected colleague, gender and development specialist Paula Kantor.

Paula died on May 13, in the aftermath of an attack on the hotel where she was staying in Kabul, Afghanistan.

“We extend our deepest condolences to her family, friends and colleagues,” said Thomas Lumpkin, CIMMYT’s director general.

“Paula’s desire to help people and make lasting change in their lives often led her into challenging settings. Her dedication and bravery was much admired by those who knew her and she leaves a lasting legacy upon which future research on gender and food security should build.”

Click here to read more about Paula’s exciting and valuable life and legacy.

Global Partnership Propels Wheat Productivity in China

By Mike Listman/CIMMYT

BEIJING, China (March 30, 2015)- Benefits of three decades of international collaboration in wheat research have added as much as 10.7 million tons of grain — worth US $3.4 billion — to China’s national wheat output, according to a study by the Center for Chinese Agricultural Policy (CCAP) of the Chinese Academy of Science.

Described in a report published on 30 March 2015 by the CGIAR Research Program on Wheat, the research specifically examined China’s partnership with the International Maize and Wheat Improvement Center (CIMMYT) and the free use of CIMMYT improved wheat lines and other genetic resources during 1982-2011. The conclusions are based on a comprehensive dataset that included planted area, pedigree, and agronomic traits by variety for 17 major wheat-growing provinces in China.

Men’s Roles and Attitudes: Key to Gender Progress

PaulaKantor-mrBy Mike Listman/CIMMYT

EL BATAN, Mexico (March 3, 2015)- Gender research and outreach should engage men more effectively, according to Paula Kantor, CIMMYT gender and development specialist who is leading an ambitious new project to empower and improve the livelihoods of women, men and youth in wheat-based systems of Afghanistan, Ethiopia and Pakistan.

“Farming takes place in socially complex environments, involving individual women and men who are embedded in households, local culture and communities, and value chains — all of which are colored by expectations of women’s and men’s appropriate behaviors,” said Kantor, who gave a brownbag presentation on the project to an audience of more than 100 scientists and other staff and visitors at El Batán on 20 February. “We tend to focus on women in our work and can inadvertently end up alienating men, when they could be supporters if we explained what we’re doing and that, in the end, the aim is for everyone to progress and benefit.”

Funded by Germany’s Federal Ministry for Economic Cooperation and Development, the new project will include 14 village case studies across the three countries. It is part of a global initiative involving 13 CGIAR research programs (CRPs), including MAIZE and WHEAT. Participants in the global project will carry out 140 case studies in 29 countries; WHEAT and MAIZE together will conduct 70 studies in 13 countries. Kantor and Lone Badstue, CIMMYT’s strategic leader for gender research, are members of the Executive Committee coordinating the global initiative, along with Gordon Prain of CIP-led Roots, Tubers and Bananas Program, and Amare Tegbaru of the IITA-led Program on Integrated Systems for the Humid Tropics, with expert advisement from specialist Patti Petesch, who contributed to World Bank studies such as “On Norms and Agency” and “Voices of the Poor.

“The cross-CRP gender research initiative is of unprecedented scope,” said Kantor. “For WHEAT, CIMMYT, and partners, understanding more clearly how gendered expectations affect agricultural innovation outcomes and opportunities can give all of our research more ‘ooomph’, helping social and biophysical scientists to work together better to design and conduct socially and technically robust agricultural R4D, and in the end achieve greater adoption and impact.”

Martin Kropff of Wageningen UR appointed Director General of CIMMYT

MKropff-lr-jpg-croppedEL BATAN, Mexico (February 26, 2015)- The Board of Trustees of the International Maize and Wheat Improvement Center (CIMMYT), is pleased to announce that Prof. Dr. Martin Kropff has accepted an appointment as the new Director General of CIMMYT, starting 1 June 2015. He follows Dr. Thomas Lumpkin, Director General since 2008, who has significantly expanded CIMMYT’s partnerships and funding, helping the center to be a leading and hugely respected institution in the CGIAR system. Read more about Kropff, including his background and thoughts on CIMMYT’s role and directions. 

Important Note: WHEAT Management and Governance Changes

EL BATAN, Mexico (January 9, 2015)- Guided by 2014 recommendations of the CGIAR Independent Evaluation Arrangement, WHEAT has established a new, Independent Steering Committee, appointed a WHEAT Director and will help CIMMYT and ICARDA to set up a single, global wheat research and development program for both centers. Click here to read the full announcement about these exciting changes in WHEAT governance and management.