The Origin of New Species

Science  22 Dec 2006:
Vol. 314, Issue 5807, pp. 1837g
DOI: 10.1126/science.314.5807.1837g

Homoploid hybrid speciation, the origin of a new species as a result of hybridization between two distinct species, is relatively rare in animals. Gompert et al. (p. 1923, published online 30 November), demonstrate that an adaptation to an extreme alpine environment has facilitated homoploid hybrid speciation in the Lycaeides butterflies of western North America. The hybrid species possesses a mosaic genome that is a mixture of the parental genomes and is reproductively isolated from both of the parental species.

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