THIS IS IRRELEVANT TO THE QUESTION OF SELECTION PRESSURE ON THE BREEDING POPULATION. The fuckpic.twitter.com/uuMXeh6Bvu
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Determining specific genetic factors in this kind of change is hard: small changes in the distribution of many genes. No smoking gun.
Chickens are sexually mature at, what- 8 weeks? Since 1957 there's been 3-400 generations. Not exactly a short time for selection.
Cursory web search suggests six months or a bit less for chickens. Cats about the same, actually.
Cats do have a much longer reproductive lifespan and aren't under nearly as much selective pressure.
But nobody's suggesting cats are giant balls of enraged fury and muscle compared to 1957, either. Just worried abt trend.
@CorrectionOfSic It might be more accurate to say that, "that is what a STRONG selective pressure can accomplish in a short time".
... You'll get people debating whether you see anything that strong (of a selective pressure) in nature. ...
... Although I heard some argue sexual selection can be that strong.
although probably not polygenic in that case... hmm
Immune complex is super super polygenic, also kind of its own thing.
immune response as a system is massively polygenic, particular disease resistance is not necessarily so
4th paragraph
it me
so this is why I have trouble finding chickens under 4 lbs to cook in the Zuni Cafe style
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