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Scientists point to potential genetic treasures in Mexico’s Creole wheats

March 28th, 2016 11:25

For Immediate Release



Sukhwinder Singh at a field of Punjab Agricultural University, India, with Mexican wheat landrace evaluation trial (foreground) and wheat lines derived from the landraces (background).

Scientists point to potential genetic treasures in Mexico’s Creole wheats

By Mike Listman
EL BATÁN, MEXICO; 14 MARCH 2016 — For the first time ever, a research team from China, India, Mexico, Uruguay, and the USA has genetically characterized a collection of 8,400 centuries-old Mexican wheat landraces adapted to varied and sometimes extreme conditions, offering a treasure trove of potential genes to combat wheat’s climate-vulnerability.

Reported today in Nature Scientific Reports and led by scientists from the Mexico-based International Maize and Wheat Improvement Center (CIMMYT), the study details critical genetic information about Mexican landraces for use in breeding to boost global wheat productivity.

This is essential, given the well-documented climate effects that imperil key wheat-growing areas, according to Sukhwinder-Singh, CIMMYT wheat researcher and corresponding author for the study.

“The landraces, known as Creole wheats, were brought to Mexico as early as the 16th Century,” said Sukhwinder-Singh, who also credited the study toMasAgro, a long-term rural development project between Mexico and CIMMYT. “Wheat is not native to Mexico, but this gave the Creoles time to toughen in zones where late-season temperatures can hit highs of 40 degrees Centigrade (104 degrees Fahrenheit).”

Heat can wreak havoc with wheat’s ability to produce plump, well-filled grains. Research has shown that wheat yields plummet 6 percent for each 1-degree-Centigrade rise in temperature, and that warming is already holding back yield gains in wheat-growing mega-regions such as South Asia, home to more than 300 million undernourished people and whose inhabitants consume over 100 million tons of wheat each year.

“Typically, massive seed collections constitute ‘black boxes’ that scientists have long believed to harbor useful diversity but whose treasures have remained scarcely utilized, mostly because we have limited information about them,” explains Prashant Vikram, CIMMYT scientist and first author of the report. “New technologies are helping us to shine a light in the dark corners. As part of MasAgro’s ‘Seeds of Discovery Component,’ the team used the latest genotyping-by-sequencing technology and created unique sets of the landrace collections that together capture nearly 90 percent of the rare gene variants, known as ‘alleles.’”

According to Kevin Pixley, director of CIMMYT’s genetic resources program and an experienced crop breeder, wheat scientists will be able to home in on groups of landraces from regions with conditions similar to those they presently target or will target in coming decades. “The next step is for breeders to identify seed samples and genes for their programs; say, alleles common to a set of landraces from a heat-stressed area, providing a valuable starting point to exploit this newly-revealed diversity.”

A pillar for global food security, wheat provides 20 percent of the protein and calories consumed worldwide and up to 50% in developing countries. A 2015 World Bank report showed that, without action, climate change would likely spark higher agricultural prices and threaten food security in the world’s poorer regions.

For Immediate Release


The International Maize and Wheat Improvement Center (CIMMYT), headquartered in Mexico, works throughout the developing world to improve livelihoods and foster more productive, sustainable maize and wheat farming. Our portfolio squarely targets critical challenges, including food insecurity and malnutrition, climate change and environmental degradation. Through collaborative research, partnerships, and training, the center helps to build and strengthen a new generation of national agricultural research and extension services in maize- and wheat-growing nations. As a member of the CGIAR consortium of 15 agricultural research centers, CIMMYT leads the CGIAR Research Programs on Maize and Wheat, which align and add value to the efforts of more than 500 partners.

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