I have a few/6 Buckeyes and I'm often thinking of how Nettie Metcalf was the first (only?) woman in America to make a new breed. I think they're so nice. So what's really involved in making a new breed, i.e. "the proof" that one's done it and it wasn't just a few or a lot of crossing? If I had to guess, I'd guess that it might involve having a predictable or constant, recognizable product of the mating of successive generations, but what is it, really?