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Pàgina inicial > Articles > Articles publicats > Adapting through glacial cycles : |
Data: | 2015 |
Resum: | Despite the large body of research devoted to understanding the role of Quaternary glacialcycles in the genetic divergence of European trees, the differential contribution of geographicisolation and/or environmental adaptation in creating population genetic divergence remainsunexplored. In this study, we used a long-lived tree (Taxus baccata) as a model species toinvestigate the impact of Quaternary climatic changes on genetic diversity via neutral (isola-tion-by-distance) and selective (isolation-by-adaptation) processes. - We applied approximate Bayesian computation to genetic data to infer its demographic his-tory, and combined this information with past and present climatic data to assess the role ofenvironment and geography in the observed patterns of genetic structure. -We found evidence that yew colonized Europe from the East, and that European samplesdiverged into two groups (Western, Eastern) at the beginning of the Quaternary glaciations,c. 2. 2 Myr before present. Apart from the expected effects of geographical isolation duringglacials, we discovered a significant role of environmental adaptation during interglacials atthe origin of genetic divergence between both groups. -This process may be common in other organisms, providing new research lines to explorethe effect of Quaternary climatic factors on present-day patterns of genetic diversity. |
Ajuts: | Ministerio de Educación y Ciencia CGL2007-63107/BOS Ministerio de Economía y Competitividad CGL2011-30182-C02-02 Ministerio de Ciencia e Innovación CSD2008-00040 Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-608 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Approximate Bayesiancomputation (ABC) ; Chloroplast DNA(cpDNA) ; Demography ; Environment-dependent selection ; Evolutionary history ; Interglacial ; Microsatellites ; Taxus baccata |
Publicat a: | The new phytologist, Vol. 208 Issue 3 (Nov. 2015) , p. 973-986, ISSN 1469-8137 |
Versió acceptada 34 p, 342.7 KB |
Material suplementari 24 p, 6.0 MB |
Taules 592.0 KB |