Wheat vs corn in a global warming future

"Wheat production generates less than half the fossil-fuel emissions of corn and returns 63 percent more protein."

""The digestibility of unprocessed corn to humans isn't very high," says Jerry Hatfield, a plant physiologist with the USDA. "We have to put it through processing of some sort, whether that happens in a factory or an animal." Set those problems aside, and a deal-breaker remains:modern corn is more sensitive to heat than any other major crop, and attempts to create drought- and heat-resistant corn through genetic modification are still unproven."

"Jones searches for drought-, disease- and flood-tolerant wheat strains that were grown in Washington a century ago (and which fell out of favor because they didn't consistently produce large yields) and breeds them with modern, high-yield varieties. Farmers sow the resulting seeds and, at the end of the season, collect the seeds from the best-performing plants to use for next year's crop. In as little as eight years, this process creates new wheat strains. And in a 2010 test in Washington's Douglas County, one of these new wheat strains outperformed all 59 competitors, including entries from genetic-engineering giants Monsanto and Syngenta"

http://m.popsci.com/science/article/2012-06/adapting-three-top-crops-hotter-planet