Comparative genomics reveals adaptive protein evolution and a possible cytonuclear incompatibility between European and American Eels.

Abstract excerpt

During the early stages of speciation, interspecific gene flow may be impeded by deleterious epistatic interactions in hybrids, which maintain parental allelic combinations at the speciation genes. The resulting semipermeable nature of the barrier to interspecific gene flow provides a valuable framework to identify the genes involved in hybrid mortality or sterility, as well as the evolutionary mechanisms that...

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