This article does not support your claim. It says European viners grafted their vines to the roots of American vines. Grafting is not cross breeding. I don

This article does not support your claim. It says European viners grafted their vines to the roots of American vines. Grafting is not cross breeding. I don't know much about the wine industry, maybe they also did cross breeding as well, but that wikipedia article doesn't mention anything like that.