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Science. 2006 Dec 22;314(5807):1923-5. Epub 2006 Nov 30.

Homoploid hybrid speciation in an extreme habitat.

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  • 1Department of Biology, Population and Conservation Biology Program, Texas State University, San Marcos, TX 78666, USA.

Abstract

According to theory, homoploid hybrid speciation, which is hybrid speciation without a change in chromosome number, is facilitated by adaptation to a novel or extreme habitat. Using molecular and ecological data, we found that the alpine-adapted butterflies in the genus Lycaeides are the product of hybrid speciation. The alpine populations possess a mosaic genome derived from both L. melissa and L. idas and are differentiated from and younger than their putative parental species. As predicted, adaptive traits may allow for persistence in the environmentally extreme alpine habitat and reproductively isolate these populations from their parental species.

PMID:
17138866
[PubMed - indexed for MEDLINE]
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