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Abstract
Knowledge about current patterns of genetic structure of populations together with the evolutionary history of a species helps to understand and predict the adaptation of populations to future climate change. We assayed variation at nuclear microsatellite markers among peripheral vs. continuous populations of the temperate South American species Austrocedrus chilensis, to investigate the role of historical vs. demographical forces in shaping population [ver mas...]
dc.contributor.authorArana, María Veronica
dc.contributor.authorGallo, Leonardo Ariel
dc.contributor.authorVendramin, Giovanni Giuseppe
dc.contributor.authorPastorino, Mario Juan
dc.contributor.authorSebastiani, Federico
dc.contributor.authorMarchelli, Paula
dc.date.accessioned2020-07-07T16:53:20Z
dc.date.available2020-07-07T16:53:20Z
dc.date.issued2010-03
dc.identifier.issn1055-7903
dc.identifier.otherhttps://doi.org/10.1016/j.ympev.2009.11.007
dc.identifier.urihttp://hdl.handle.net/20.500.12123/7528
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S1055790309004540
dc.description.abstractKnowledge about current patterns of genetic structure of populations together with the evolutionary history of a species helps to understand and predict the adaptation of populations to future climate change. We assayed variation at nuclear microsatellite markers among peripheral vs. continuous populations of the temperate South American species Austrocedrus chilensis, to investigate the role of historical vs. demographical forces in shaping population genetic structure. This species occurs in continuous populations in the west and central distribution range, but becomes highly fragmented at the eastern limit, which comprised ice-free areas during Quaternary glaciations and has extreme climatic conditions at present times. Bayesian analysis methods identified two contrasting patterns of genetic structure; (I) populations from humid, mesic and peri-glacial regions formed a single deme with relatively low genetic differentiation and high admixture levels whereas (II) a highly heterogeneous genetic structure with low level of admixture was found in the steppe, towards the east and northeast limit of the distribution range. In the steppe, population fragmentation, restricted gene flow and isolation-by-distance were also inferred. In addition, several small steppe populations showed high genetic diversity and divergent gene pools, suggesting that they constitute ancient refuges from pre-Holocene glaciations with just a subgroup of them contributing significantly to post-glacial spread. These results are discussed in relation to patterns of genetic variation found for other temperate species and the contribution of the particular southern Andes topography and climate to post-glacial spread.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceMolecular Phylogenetics and Evolution 54 (3) : 941-949 (Marzo 2010)es_AR
dc.subjectAustrocedruses_AR
dc.subjectDiversidad Genética (como recurso)es_AR
dc.subjectGenetic Diversity (as resource)eng
dc.subjectAdaptación al Cambio Climáticoes_AR
dc.subjectClimate Change Adaptationeng
dc.subject.otherAustrocedrus Chilensises_AR
dc.subject.otherRegión Patagónicaes_AR
dc.titleHigh genetic variation in marginal fragmented populations at extreme climatic conditions of the Patagonian Cypress Austrocedrus chilensises_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEstación Experimental Agropecuaria Barilochees_AR
dc.description.filFil: Arana, María Veronica. Intituto Nacional de Tecnologia Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Área Recursos Forestales. Unidad de Genética Ecológica y Mejoramiento Forestal; Argentinaes_AR
dc.description.filFil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Unidad de Genética Ecológica y Mejoramiento Forestal; Argentinaes_AR
dc.description.filFil: Vendramin, Giovanni Giuseppe. National Research Council of Italy. Institute of Biosciences and Bioresources. Division of Florence; Italiaes_AR
dc.description.filFil: Pastorino, Mario Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientıicas y Tecnicas; Argentinaes_AR
dc.description.filFil: Sebastiani, Federico. National Research Council of Italy. Institute of Biosciences and Bioresources. Division of Florence; Italiaes_AR
dc.description.filFil: Marchelli, Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientıicas y Tecnicas; Argentinaes_AR
dc.subtypecientifico


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