This is random - but do GP's must have genetic problems that are not problems for the carriers? Because I know that sometimes when you breed two dwarf rabbits, if a baby gets the dwarf gene from both parents then it turns out to be a 'peanut' and dies soon after birth. But if it only gets one dwarf gene, then it's a dwarf rabbit and survives and isn't considered to have bad genes.
So I guess what I'm trying to get at is that if you don't inbreed at all, and some of the piggies are carries for something but don't get effected by it - then it's only bad if you happen to breed them to another pig with the same defective gene, in which case the offspring could be effected. Either way the only way to find out theres a problem would be if you happened to breed two pigs with the same defect.
Couldn't it also be possable that one sibling gets the bad gene, and one doesn't - so that inbreeding would result in healthy babies but you would still have bad lines?
That sucks though if it's true that genetic problems manifest in them after 1 year, and after they've probably already been breed.
I'm not trying to start a debate here, I'm just curous! But why inbreed if there's a chance you could miss a defective gene (by my logic, I could be wrong), you could possably find out the same info from just regular breeding...and if the defects don't show up until after 1 year sometimes?
Too bad they're isn't just a way to test the genetics of an animal beforehand without having to actually breed them.
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