That book looks amazing... Thanks for the recommendation! I thought that we were sort of having a renaissance of breeders looking back to wild relatives for novel traits. At least in tomato breeding I guess (all the recently popular purple varieties), I don't know about potato market breeders. But I imagine the most important thing is the disease resistance genes that wild relatives may have (like you said) bc modern potatoes have so many problems with viruses and cyst nematodes! Also I think there could be varieties that aren't suitable for market gardening that may have some upsides for the home gardener.