Corn wouldn't be affected at all, for a start, being wind pollinated. Isn't that true of most of the grasses?
And then we must talk about mounting consequences of "unintended" consequences. If you intend nothing but a quick profit, that is what you get.
I just looked up info on the other huge-tonnage crop: Soybean plants are self-pollinating, auto-incestuous creatures. Words and ideas I offer here may be used freely and without attribution.