Hybridization in the absence of an ecotone favors hybrid success in woodrats (Neotoma spp.).

Autor:	Klure DM; School of Biological Sciences, University of Utah, Salt Lake City, UT, United States., Greenhalgh R; School of Biological Sciences, University of Utah, Salt Lake City, UT, United States., Parchman TL; Department of Biology, University of Nevada Reno, Reno, NV, United States., Matocq MD; Department of Natural Resources and Environmental Science, Program in Ecology, Evolution and Conservation Biology, University of Nevada Reno, Reno, NV, United States., Galland LM; Department of Biology, University of Nevada Reno, Reno, NV, United States., Shapiro MD; School of Biological Sciences, University of Utah, Salt Lake City, UT, United States., Dearing MD; School of Biological Sciences, University of Utah, Salt Lake City, UT, United States.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2023 Apr 01; Vol. 77 (4), pp. 959-970.
DOI:	10.1093/evolut/qpad012
Abstrakt:	Hybridization is a common process that has broadly impacted the evolution of multicellular eukaryotes; however, how ecological factors influence this process remains poorly understood. Here, we report the findings of a 3-year recapture study of the Bryant's woodrat (Neotoma bryanti) and desert woodrat (Neotoma lepida), two species that hybridize within a creosote bush (Larrea tridentata) shrubland in Whitewater, CA, USA. We used a genotype-by-sequencing approach to characterize the ancestry distribution of individuals across this hybrid zone coupled with Cormack-Jolly-Seber modeling to describe demography. We identified a high frequency of hybridization at this site with ~40% of individuals possessing admixed ancestry, which is the result of multigenerational backcrossing and advanced hybrid-hybrid crossing. F1, F2, and advanced generation hybrids had apparent survival rates similar to parental N. bryanti, while parental and backcross N. lepida had lower apparent survival rates and were far less abundant. Compared to bimodal hybrid zones where hybrids are often rare and selected against, we find that hybrids at Whitewater are common and have comparable survival to the dominant parental species, N. bryanti. The frequency of hybridization at Whitewater is therefore likely limited by the abundance of the less common parental species, N. lepida, rather than selection against hybrids. (© The Author(s) 2023. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE).)
Databáze:	MEDLINE
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