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Stronger spatial genetic structure in recolonized areas than in refugia in the European beech

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDE LAFONTAINE, Guillaume
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDUCOUSSO, Alexis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLEFEVRE, Sophie
hal.structure.identifierBiologie intégrative des organismes marins [BIOM]
dc.contributor.authorMAGNANOU, Elodie
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPETIT R.J., Remy
dc.date.issued2013
dc.identifier.issn0962-1083
dc.description.abstractEnExtant rear-edge populations located in former glacial refugia remain understudied despite their high conservation value. These populations should have experienced strong genetic drift due to their small size and long isolation. Moreover, the prolonged action of isolation by distance in refugial areas should result in stronger regional spatial genetic structure (SGS) than in recolonized areas, but empirical tests of this prediction are scarce. To fill this gap, we first used a set of 16 microsatellite markers to investigate the genetic structure of European beech in France in 65 populations from three refugial areas and one control recolonized (nonrefugial) area. Then, using the same approach, we reanalysed published isozyme data from 375 populations distributed across the entire species range. We found stronger genetic differentiation among populations in refugia than in recolonized areas. However, contrary to expectations, regional SGS was lower within refugia than within recolonized areas. Published studies presenting similar analyses suggest that our results could have generality across different biogeographical settings and types of organisms. Strong and prolonged genetic drift in refugial areas could have erased the signature of range expansions that is still visible in recolonized areas. Our results therefore suggest that Pleistocene population isolation has played a key role in increasing the genetic complexity of extant rear-edge populations.
dc.description.sponsorshipPlateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016
dc.language.isoen
dc.publisherWiley
dc.subject.enEurope
dc.subject.enFagus sylvatica
dc.subject.engenetic differentiation
dc.subject.englacial refugia
dc.subject.enisolation-by-distance
dc.subject.enrange expansion
dc.subject.enrear edge
dc.subject.enspatial genetic structure
dc.title.enStronger spatial genetic structure in recolonized areas than in refugia in the European beech
dc.typeArticle de revue
dc.identifier.doi10.1111/mec.12403
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalMolecular Ecology
bordeaux.page4397-4412
bordeaux.volume22
bordeaux.issue17
bordeaux.peerReviewedoui
hal.identifierhal-02646918
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02646918v1
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