Interesting, I wouldn’t have thought that a few hundreds of years would be enough to hybridize a strain to growing in a colder climate, but...I admit I don’t have enough knowledge of that kind of thing to know any better!
Thanks for that link...
The cultivated grains that produce larger, better, or more easily harvested seed got disproprotionately selected by the farmers, year after year, and the local climates screened out nonviable variants. :^)