Adaptation by introgression
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Journal of Biology 2009, 8:82 doi:10.1186/jbiol176Published: 13 October 2009
Both selective and random processes can affect the outcome of natural hybridization. A recent analysis in BMC Evolutionary Biology of natural hybridization between an introduced and a native salamander reveals the mosaic nature of introgression, which is probably caused by a combination of selection and demography.