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Speciation in peripheral populations: effects of drift load and mating systems
Univ Vienna, Dept Math, Vienna, Austria.
Univ N Carolina, Dept Biol, Chapel Hill, NC USA.
Univ Vienna, Dept Math, Vienna, Austria.; Univ Vienna, Max Perutz Labs, Vienna, Austria.
2016 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 29, no 5, 1073-1090 p.Article in journal (Refereed) Published
Abstract [en]

Speciation in peripheral populations has long been considered one of the most plausible scenarios for speciation with gene flow. In this study, however we identify two additional problems of peripatric speciation, as compared to the parapatric case, that may impede the completion of the speciation process for most parameter regions. First, with (predominantly) unidirectional gene flow, there is no selection pressure to evolve assortative mating on the continent. We discuss the implications of this for different mating schemes. Second, genetic load can build up in small populations. This can lead to extinction of the peripheral species, or generate selection pressure for lower assortative mating to avoid inbreeding. In this case, either a stable equilibrium with intermediate assortment evolves or there is cycling between phases of hybridization and phases of complete isolation.

Place, publisher, year, edition, pages
2016. Vol. 29, no 5, 1073-1090 p.
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-283506DOI: 10.1111/jeb.12849ISI: 000382498000016PubMedID: 26929184OAI: oai:DiVA.org:uu-283506DiVA: diva2:919239
Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2017-11-30Bibliographically approved

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Rettelbach, Agnes

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