I can see that "human made" mongrel populations are genetically more diverse than natural ones.
But diversity of what genes? Humans have always been selecting for honey and docile behaviour.
So I wonder what the differences in genetic diversity are when one looks at genes that code for proteins involved in immunoresponse or behaviour traits involved in surviving adverse conditions.
Being really diverse for something is not necessarily good. Yes it is for the "population as a whole" but local populations under local selective pressure might be negatively affected by mixing.
I'll try to get hold of the article to see what they looked at.
Lennard
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