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Peripheral sites usually offer suboptimal conditions for species with wide distributions, where expression of phenotypic variability and potential interspecific hybridization might be enhanced. The Patagonian steppe, the largest and southernmost dryland ecosystem in South America, is characterized by natural rangelands dominated by grasses. Festuca pallescens is a keystone species with a wide distribution in Patagonia over diverse environments reaching [ver mas...]
dc.contributor.authorLopez, Aldana
dc.contributor.authorAzpilicueta, Maria Marta
dc.contributor.authorLopez, Dardo Ruben
dc.contributor.authorSiffredi, Guillermo Lorenzo
dc.contributor.authorMarchelli, Paula
dc.coverage.spatialPatagonia (general region)
dc.date.accessioned2018-04-12T12:26:14Z
dc.date.available2018-04-12T12:26:14Z
dc.date.issued2018-03
dc.identifier.issn1211-9520 (Print)
dc.identifier.issn1874-9348 (Online)
dc.identifier.otherhttps://doi.org/10.1007/s12224-017-9304-1
dc.identifier.urihttp://hdl.handle.net/20.500.12123/2226
dc.identifier.urihttps://link.springer.com/article/10.1007/s12224-017-9304-1
dc.description.abstractPeripheral sites usually offer suboptimal conditions for species with wide distributions, where expression of phenotypic variability and potential interspecific hybridization might be enhanced. The Patagonian steppe, the largest and southernmost dryland ecosystem in South America, is characterized by natural rangelands dominated by grasses. Festuca pallescens is a keystone species with a wide distribution in Patagonia over diverse environments reaching the extreme arid zones in the Somuncura plateau, a biogeographical island. Our aim is to study the phylogenetic relationships among Festuca pallescens populations as well as between this species and the sympatric F. argentina in North Patagonia. We analysed fourteen populations along a west-east transect of about 500 km in North Patagonia with three types of molecular markers: ITS, chloroplast trnL-F and eight nuclear microsatellites. Bayesian inferences, maximum parsimony and maximum likelihood analyses with trnL-F and ITS showed that F. pallescens is related to the Patagonian clade within the Festuca phylogeny. However, the easternmost populations of F. pallescens at Somuncura plateau were highly differentiated from the other populations and clustered with F. argentina (a sympatric species of the Asian-American clade). Principal coordinates analyses and Bayesian clustering performed with nuclear microsatellites as well as morphoanatomical traits, showed an intermediate position of one of these easternmost populations with respect to the two species, suggesting admixture. The high genetic variability observed in these peripheral populations highlight their relevance for conservation and might be indicating the existence of evolutionary processes triggering events of speciation in the Patagonian fescues.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourceFolia geobotanica 53 (1) : 115–131. (March 2018)
dc.subjectFestuca
dc.subjectIntrogresión
dc.subjectIntrogressioneng
dc.subjectVariación Genética
dc.subjectGenetic Variationeng
dc.subject.otherRegión Patagónica
dc.titlePhylogenetic relationships and intraspecific diversity of a North Patagonian Fescue: evidence of differentiation and interspecific introgression at peripheral populations
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.origenEEA Bariloche
dc.gic155961
dc.description.filFil: Lopez, Aldana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.filFil: Azpilicueta, Maria Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina
dc.description.filFil: Lopez, Dardo Ruben. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Campo Anexo Villa Dolores; Argentina
dc.description.filFil: Siffredi, Guillermo Lorenzo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina
dc.description.filFil: Marchelli, Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.subtypecientifico


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