650 years is not much on evolutionary time. But a lot depends on the selective pressures and the amount of mutation. IDK if much could be attributed to natural evolution, but I'm doubtful.
On one hand, named varieties are propagated via cloning (cuttings, tip rooting, air layering, tissue cultures, etc.)
On the other hand, new fruit varieties are bred all the time. Human breeding programs can produce huge variations in a few decades. I have pluot trees that are hybrid species developed very recently.
And think: 650 years ago, Europeans barely even heard of the tomato and potato!
Human pressure on agriculture can
both speed things up
and slow them waaay down.
650 years isn't much on evolutionary time for things with long lifespans. For plants, you can see serious adaptions in just a few years. Otherwise the entire occupation of horticulture wouldn't have existed.
