Evolution at two time frames : Polymorphisms from an ancient singular divergence event fuel contemporary parallel evolution

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dc.contributor.author Van Belleghem, Steven M.
dc.contributor.author Vangestel, Carl
dc.contributor.author De Wolf, Katrien
dc.contributor.author De Corte, Zoe
dc.contributor.author Most, Markus
dc.contributor.author Rastas, Pasi
dc.contributor.author De Meester, Luc
dc.contributor.author Hendrickx, Frederik
dc.date.accessioned 2019-02-05T09:56:03Z
dc.date.available 2019-02-05T09:56:03Z
dc.date.issued 2018-11
dc.identifier.citation Van Belleghem , S M , Vangestel , C , De Wolf , K , De Corte , Z , Most , M , Rastas , P , De Meester , L & Hendrickx , F 2018 , ' Evolution at two time frames : Polymorphisms from an ancient singular divergence event fuel contemporary parallel evolution ' , PLoS Genetics , vol. 14 , no. 11 , 1007796 . https://doi.org/10.1371/journal.pgen.1007796
dc.identifier.other PURE: 122067998
dc.identifier.other PURE UUID: ea61c9d4-d109-4b1d-8043-89590fa06714
dc.identifier.other WOS: 000452454300048
dc.identifier.other Scopus: 85057249586
dc.identifier.uri http://hdl.handle.net/10138/298668
dc.description.abstract When environments change, populations may adapt surprisingly fast, repeatedly and even at microgeographic scales. There is increasing evidence that such cases of rapid parallel evolution are fueled by standing genetic variation, but the source of this genetic variation remains poorly understood. In the salt-marsh beetle Pogonus chalceus, short-winged 'tidal' and long-winged 'seasonal' ecotypes have diverged in response to contrasting hydrological regimes and can be repeatedly found along the Atlantic European coast. By analyzing genomic variation across the beetles' distribution, we reveal that alleles selected in the tidal ecotype are spread across the genome and evolved during a singular and, likely, geographically isolated divergence event, within the last 190 Kya. Due to subsequent admixture, the ancient and differentially selected alleles are currently polymorphic in most populations across its range, which could potentially allow for the fast evolution of one ecotype from a small number of random individuals, as low as 5 to 15, from a population of the other ecotype. Our results suggest that cases of fast parallel ecological divergence can be the result of evolution at two different time frames: divergence in the past, followed by repeated selection on the same divergently evolved alleles after admixture. These findings highlight the importance of an ancient and, likely, allopatric divergence event for driving the rate and direction of contemporary fast evolution under gene flow. This mechanism is potentially driven by periods of geographic isolation imposed by large-scale environmental changes such as glacial cycles. en
dc.format.extent 26
dc.language.iso eng
dc.relation.ispartof PLoS Genetics
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject GENE-FLOW
dc.subject BEETLE
dc.subject HISTORY
dc.subject CONVERGENCE
dc.subject POPULATIONS
dc.subject 1184 Genetics, developmental biology, physiology
dc.title Evolution at two time frames : Polymorphisms from an ancient singular divergence event fuel contemporary parallel evolution en
dc.type Article
dc.contributor.organization Biosciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1371/journal.pgen.1007796
dc.relation.issn 1553-7404
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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