"The remaining 88 percent of the variation from one center to another are unmeasured factors, that we don't quite know what those factors are."

VOA: standard.2010.07.14

Again,where I think there is at least a moderate impact from genetic variation."

VOA: standard.2010.07.14

are very similar genetically. "And that's a real problem when you're trying to overcome new insect or disease threats or pressures, or trying to breed a plant that's more water efficient, or even finding genetic variation for water production."

VOA: standard.2010.02.01