Extinction and introgression in a community of partially cross-fertile plant species

The American Naturalist
Jean-Baptiste Ferdy, Frédéric Austerlitz

Abstract

We develop a model to study the demography and genetics of an encounter between two partially cross-fertile plant species. We assume prezygotic reproductive isolation between the species, a common situation when the species differ by their phenology or floral traits that cause assortative mating. Three outcomes are possible: coexistence of both species with minimal introgression; domination by one species, with the other becoming extinct or surviving only through recurrent migration; or domination of the community by hybrid derivatives, with both species surviving but with a rather high level of introgression between them. The first situation is reached when interfertility is low, while the third requires high interfertility to develop. Occurrence of the second situation is observed with intermediate values of interfertility. Gene flow from nearby monospecific populations can prevent both introgression and the domination of the community by one species. Conversely, increasing the number of loci that determine the reproductive isolation between species or decreasing the degree of nonadditive interactions (epistasis and/or dominance) between alleles and loci makes introgression more likely. We found that hybridization can create ...Continue Reading

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Citations

Jun 17, 2006·Proceedings. Biological Sciences·Richard J HallDebra R Ayres
Nov 17, 2006·BMC Evolutionary Biology·Pierre R GérardNathalie Frascaria-Lacoste
Mar 24, 2012·Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists·Shelley Leininger, Reid Skeel
Sep 30, 2009·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Melba Herrera-AguilarEric Dumonteil
Jul 31, 2007·Theoretical Population Biology·Inez DemonFrank van den Bosch
May 3, 2008·Evolution; International Journal of Organic Evolution·Mathias CurratLaurent Excoffier
Jul 29, 2016·Evolutionary Applications·Marco TodescoLoren H Rieseberg
Sep 8, 2016·Proceedings of the National Academy of Sciences of the United States of America·Mohsen B MesgaranRoger D Cousens
Feb 7, 2018·Scientific Reports·Claudio S QuilodránJuan I Montoya-Burgos
Mar 5, 2019·Evolutionary Applications·Chunyuan ZhangNing Li
Aug 9, 2006·Evolution; International Journal of Organic Evolution·Subray G HegdeNorman C Ellstrand
Jun 20, 2018·Evolution; International Journal of Organic Evolution·April M RandleSusan Kalisz

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