Follow up story from Tim Johnson of McClatchy
Plant specialists describe the native varieties of corn in Mexico as a genetic trove that might prove valuable should extreme weather associated with global warming get out of hand. Corn, one of the most widely grown grains in the world, is a key component of the global food supply.
But experts say Mexico's native varieties are themselves under peril — from economics and genetic contamination — potentially depriving humans of a crucial resource.
Farmers are punished at the marketplace for selling native corn, and some types are dwindling from use. Perhaps more significantly, genetically modified corn is drifting southward and mingling with native varieties, potentially bringing unexpected aberrations and even possible extinction......