Scientists: 'Super' wheat to boost food security

June 11, 2011 By STEVE KARNOWSKI , Associated Press

(AP) -- Scientists say they're close to producing new "super varieties" of wheat that will resist a virulent fungus while boosting yields up to 15 percent, potentially easing a deadly threat to the world's food supply.

The research is part of a global drive to protect from the Ug99 strain of . It will be presented next week at a conference in St. Paul that's part of the Borlaug Global Initiative, based at Cornell University in Ithaca, N.Y., organizers said Thursday.

Scientists will also report that Ug99 variants are becoming increasingly virulent and are being carried by the winds beyond Uganda and other East African countries where they were first identified in 1999. Once infected with the deadly fungus, become covered in reddish-brown blisters.

According to a news release issued by the initiative ahead of the symposium, the fungus has now spread across all of eastern and southern Africa, and it might just be a matter of time before it reaches India or Pakistan, and even Australia and the Americas.

"We are facing the prospect of a biological firestorm, but it's also clear that the research community has responded to the threat at top speed, and we are getting results in the form of new varieties that are resistant to rust and appealing to farmers," Ronnie Coffman, who heads the Durable Rust Resistance in Wheat project at Cornell, said in the release.

Researchers will report at the conference that new varieties of wheat under development at the International Maize and Wheat Improvement Center in Mexico show resistance to all three kinds of - stem rust including Ug99, yellow rust and leaf rust - the release said. Some of those varieties also boost yields 10 to 15 percent, it said.

But significant obstacles must be overcome before the resistant new varieties of wheat can replace the susceptible varieties that make up as much as 90 percent of the wheat now in production, the researchers acknowledged. They called for more investments by wealthy countries and international institutions to continue developing the varieties, to help them keep them effective against diseases that continue to evolve, and to develop the seed production and distribution infrastructure needed to put the new varieties in the hands of poor farmers in developing countries.

The new strains mark a huge advance, said Marty Carson, research director at the U.S. Department of Agriculture's Cereal Research Laboratory at the University of Minnesota in St. Paul.

"Anytime you can talk about a 15 percent boost in yields from existing varieties, I mean that's phenomenal. And to get combined resistance to all three rusts, that's also a very big deal," said Carson, who wasn't directly involved in that research. His lab, which is heavily involved in the fight against Ug99, is hosting the conference along with the University of Minnesota.

Carson pointed out in an interview that wheat farmers in the developing world that the Mexican institute known by its Spanish acronym CIMMYT is targeting with these new varieties don't have many other options, such as fungicides, for dealing with threats such as rust. And while he was skeptical about the 15 percent claim, he said even a lower yield increase would be a major accomplishment.

The Borlaug Global Rust Initiative was launched five years ago by the late Nobel Peace Prize winner Norman Borlaug in response to the Ug99 threat. Borlaug, an alumnus of the University of Minnesota, was a leader of CIMMYT. His research sparked the "Green Revolution" of the 1960s that transformed agriculture through high-yield, disease-resistant crops and other innovations, helping to more than double world food production by 1990. He's credited with saving perhaps 1 billion people from starvation.

Ravi Singh, a breeder at CIMMYT, helped lead the research on the new strains, which he'll present at the conference and publish later this year in the Annual Review of Phytopathology. He said in an interview that the new varieties were developed through conventional crossbreeding, not genetic engineering. They have been tested successfully for disease resistance in Kenya and Ethiopia, where Ug99 is endemic, as well as at the USDA lab in St. Paul.

Donor-funded CIMMYT distributes its seed for free to keep it affordable, Singh said, and the new varieties will be planted in several countries for yield trials in the coming growing season in hopes they can enter widespread use in a few years.

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More information: Borlaug Global Rust Initiative:


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2.3 / 5 (3) Jun 11, 2011
Only for a generation or so.. then when the population goes up that supposed "food security" becomes a necessity just to get by. The best "food security" is birth control, an education for women and the breaking of strong patriarchal societies that oppress women.
1 / 5 (2) Jun 11, 2011
I have always wondered why we cannot engineer wheat that 'comes back' the way so-called 'weeds' do. I mean; No replanting every year, just turn the soil and fertilize it at the end of the harvest and next year, VIOLA' a new wheat crop comes up.
Is there a genetic impediment to engineering wheat, corn, barley etc, in this way?
not rated yet Jun 12, 2011
I'll be the first to say i hate the orwellian eugenics of population control, but we as a collective world must address some form of population control. The world we live on is Finite.
not rated yet Jun 13, 2011
It's quite apparent that many have learned the first law of thermo-dynamics but it is also evident that it is understood by only very few.
Increasing the productivity of any grain means that the soil where it is grown depletes at a faster pace. Synthetic fertilizers are certainly not the non-plus-ultra. On the other hand, nobody can get anything from nothing. The best way is to adopt measures that nature has been successfully demonstrating for billions of years. I'm completely anti to the Vatican's thesis concerning world population.
1 / 5 (1) Jun 13, 2011
210, If I remember correctly, we don't have "self planting" wheat because during the domestication process the "more harvestable" wheat were the varieties which held their seeds onto the stalks the strongest so they wouldn't fall off pre-harvest or during storms. The downside is that they don't drop their seeds to perpetually self-plant. That's the trade off: "Do we want wheat that will pretty much all be there when we come to harvest it, or wheat that comes back each year but yeilds paltry/undependable harvests?"

One thing that enabled Norman Borlaug to launch the "Green Revolution" was a realizing that had nothing to do with self-planting, rather that "short stalk" wheat produced better yeilds than "tall stalk" wheat. The day may come when the rustic visage tall waving grain are a thing of the past, because a plant that doesn't bother to put all that growth energy into a needlessly tall stalk is more likely to direct its efforts into producing a far larger yeild.

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