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

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.