Posts Tagged ‘Wheat’

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

Haryana-2015-cropped

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 .

Call for Applications for Basic Wheat Improvement Course

By Katie Lutz/CIMMYT

EL BATAN, Mexico (November 25, 2015) – Applications for the Basic Wheat Improvement Course (BWIC) are due 15 December.

The BWIC is a three-month intensive program at the Campo Experimental Norman E. Borlaug (CENEB) in Ciudad Obregon, Sonora, that targets young and mid-career scientists, focusing on applied breeding techniques in the field.

The training program has benefited national research programs since its inception. The increasing number of wheat scientists in major wheat producing countries reflects the great need and interest of national programs in training young scientists. One of the most frequent requests from countries and national programs is for more trained scientists.

Fast-tracking wheat seed deployment in remote Pakistan regions

By Mike Listman/CIMMYT

ISLAMABAD, Pakistan (November 19,2015)-Nearly 10,000 smallholder farmers in marginal, far-flung areas of Pakistan are harvesting more, eating better, and earning cash from their wheat crops, as a result of a partnership that is working to offer widespread access to improved wheat seed and farming practices.

“The extra grain from the new varieties will be enough for my family for three additional months,” said farmer Khan Said of Swat, Khyber Pakhtunkhwa, Pakistan, as he surveyed his tawny, sun-kissed wheat field. He also hoped the extra straw from his crop would earn him about US $140.

In autumn-2014, participating farmers in 63 moderately-to-highly-food-insecure districts received a 25-kilogram bag of seed of the new varieties—enough to sow a quarter hectare and compare their performance with that of traditional varieties, as well as helping to grow more seed for redistribution. The new varieties are high-yielding and resist wheat rust, a fungal disease whose three forms—stem, leaf, and yellow rust—are found on as much as half of Pakistan’s wheat area and which constitute a rising threat to the crop.

“Our results show a yield advantage of more than 100% in harsh environments for the new varieties and, after just one season, farmers are attesting to significant improvements in their food security and livelihoods,” said Krishna Dev Joshi, CIMMYT wheat improvement specialist who is coordinating the contributions of 27 partners with this aim. “This proves how, with better access to seed of new varieties and technical support, Pakistani farmers can benefit from the latest wheat science and replace older, rust-susceptible varieties.”

According to Joshi, if half of the harvest from the new varieties were saved as seed, this could be sown on at least 30,000 hectares, producing enough additional seed to cover 1 million hectares in the third year with no extra costs, through farmer-to-farmer seed flow networks, and ultimately creating visible impacts in the project area. The follow-up surveys indicated an overwhelming acceptance of new wheat varieties, as over 87% of participating farmers saved their seeds to expand area under the varieties.

$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.

Zero-till Wheat Raises Farmers’ Incomes in Eastern India, Research Shows

By Anuradha Dhar/CIMMYT

NEW DEHLI, India (September 30, 2015)- Large-scale adoption of zero tillage wheat production could play a major role in making the eastern Indian state of Bihar self-sufficient in wheat, according to a new study published by CIMMYT agricultural scientists.Farmer with wheat harvest (2)

In a study published last month in Food Security, CIMMYT researchers reported that wheat farmer’s total annual income increased by 6% on average with the introduction of zero tillage (ZT) in Bihar. While studies done in the past in the eastern Indo-Gangetic Plains (IGP) have shown ZT impacts in field trials or controlled environments, this research is believed to be the first that studied actual impacts in farmers’ fields.

ZT allows direct planting of wheat without plowing, sowing seeds directly into residues of the previous crop on the soil surface, thus saving irrigation water, increasing soil organic matter and suppressing weeds.

“We found that the prevailing ZT practice, without full residue retention, used by farmers in Bihar has led to an average yield gain of 498 kilogram per hectare (19%) over conventional tillage wheat, which is in contrast to the results of a recent global meta-analysis” says Alwin Keil, Senior Agricultural Economist, CIMMYT and the lead author of this study.

The global meta-analysis published last year compared crop yields in ZT and conventionally tilled production systems across 48 crops in 63 countries. It reported that ZT is only profitable in rainfed systems and when it is combined with full residue retention and crop rotation. “However, in Bihar, marginal and resource-poor farmers cannot afford to leave the full residue in the field as they use the rice straw to feed their livestock,” says Keil.

Strengthening Results-based Management in the MAIZE and WHEAT CRPs

By Michelle Guertin/CIMMYT

EL BATAN, Mexico (September 18, 2015)- Recognizing the importance of managing for results and learning from experience, the MAIZE and WHEAT CGIAR Research Programs (CRPs) have been taking steps to strengthen results-based management (RBM) within the CRPs. In the last several months, both CRPs held multiple participatory workshops (see details below) to develop theories of change (ToCs) for their diverse research areas. These ToCs map out how and why a given research area will lead to specific results. ToCs are often used as a framework for testing hypotheses, where evidence is collected to validate the pathway of change.

The participatory nature of these workshops allowed the research teams to come together and develop consensus-based and aligned theories of change. This process was important to build buy-in and ownership. It was also recognized that change maps can support the development of research strategies and contribute to strengthening proposal development and results reporting by ensuring alignment and consistency across projects and programs.

Alignment is important not only at the project and program levels. Theories of change were clearly linked to attaining higher and global level results from the new CGIAR Strategy and Results Framework 2016-2030 and the upcoming Sustainable Development Goals. It was important for both CRPs to demonstrate how their programs contribute to global issues of poverty reduction, food security, improved nutrition, promotion of sustainable agriculture, and the achievement of gender equality.

In preparation for phase II of the CGIAR research programs

Reflections of a Wheat Trainee: Zaki Afshar, Afghanistan

Zaki Afshar in the field at CIMMYT Afghanistan after the 2015 Basic Wheat Improvement Course

Zaki Afshar in the field at CIMMYT Afghanistan
Photo Courtesy: Zaki Afshar/ CIMMYT

By Katie Lutz/CIMMYT

CIUDAD OBREGON, Mexico (September 10, 2015)- Zaki Afshar grew up in the small city of Puli Khumri in Northern Afghanistan, visiting his father’s seven-hectare (ha) farm every weekend. Growing up in a farming community where the staple crops are wheat and rice, Afshar saw the impact agriculture could have on a community.

“A big part of why I chose agriculture was because I saw how hard the farmers worked and still suffered,” said Afshar. “I wanted to know how I could help them. Why were they not using the advanced technologies I saw available in other parts of the world?”

According to The United States Agency for International Development (USAID), 60 percent of Afghan citizens rely on agriculture to sustain their livelihoods and families. Wheat is the chief crop in Afghanistan, covering 2.5 million ha and providing about 60 percent of daily calorie intake for an average Afghan.

“We have a very basic agriculture system,” explained Afshar. “You will only see machinery used for plowing and trashing, not for sowing or even harvesting.”

Afshar attended Balkh University in Mazari Sharif, receiving a degree in Agricultural Plant Science. He currently works at the CIMMYT Afghanistan office as a project associate as in the Wheat Improvement Program.

Available Now: The WHEAT Wire!

wheatwire2.2EL BATAN, Mexico ( July 6, 2015)- The WHEAT Wire is a quarterly newsletter designed to keep you informed of important events and outcomes in WHEAT, with a special focus on our national and international research and development partners.

This volume features information regarding the next generation of CRPs, the results of the WHEAT Independent Evaluation and updates from CIMMYT and ICARDA. Read more in latest version of The WHEAT Wire.