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Adaptation by introgression

Michael L Arnold1* and Noland H Martin2

Author Affiliations

1 Department of Genetics, University of Georgia, Athens, Georgia 30602, USA

2 Department of Biology, Texas State University, San Marcos, Texas 78666, USA

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Journal of Biology 2009, 8:82  doi:10.1186/jbiol176

Published: 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.