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February 07, 2003

Neutral is not always the safest route....

Some of you might have read my earlier blog entry on reservations I've been having about using neutral markers to map genetic relationships between populations. Well, check this out: Neutral DNA markers fail to detect genetic divergence in an ecologically important trait (this is on the Human Races site, so it might be over bandwidth).

Posted by razib at 01:04 AM




I'm not surprised. In fact I don't see why neutral markers would be expected to show genetic divergence in a trait that is so clearly adaptive, unless the history was such that the trait variation occurred randomly first (and remained of no adaptive value for some time) and then became a significant component of genetic fitness at some later point...

Posted by: bbartlog at February 7, 2003 04:44 AM