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Abstract
Interspecific gene flow is a common phenomenon in Nothofagaceae species; however, the dynamics of introgression in hybrid zones remains largely unknown. We focused on two ecologically and morphologically different Nothofagus species from Patagonia, Nothofagus nervosa and Nothofagus obliqua. In a natural hybrid zone, we established two plots 280mapart in altitude (ca. 1.9 °C difference in mean temperature), and two subplots which captured microsite [ver mas...]
dc.contributor.authorEl Mujtar, Veronica Andrea
dc.contributor.authorSola, Georgina Giselle
dc.contributor.authorAparicio, Alejandro Gabriel
dc.contributor.authorGallo, Leonardo Ariel
dc.date.accessioned2019-07-12T10:52:01Z
dc.date.available2019-07-12T10:52:01Z
dc.date.issued2017-03-29
dc.identifier.issn1614-2942
dc.identifier.issn1614-2950
dc.identifier.otherhttps://doi.org/10.1007/s11295-017-1132-1
dc.identifier.urihttp://hdl.handle.net/20.500.12123/5481
dc.identifier.urihttps://link.springer.com/article/10.1007/s11295-017-1132-1
dc.description.abstractInterspecific gene flow is a common phenomenon in Nothofagaceae species; however, the dynamics of introgression in hybrid zones remains largely unknown. We focused on two ecologically and morphologically different Nothofagus species from Patagonia, Nothofagus nervosa and Nothofagus obliqua. In a natural hybrid zone, we established two plots 280mapart in altitude (ca. 1.9 °C difference in mean temperature), and two subplots which captured microsite variation (abundance and spatial distribution of species and predominance of wind direction). We used intensive sampling of individuals (2055, including adults and regeneration) and molecular genotyping of 6 highly species-specific nuclear microsatellites for the identification and classification of hybrids, based on estimates of ancestry and interclass heterozygosity. We evaluated the relative contribution of our sampling effects to variation in hybrid incidence and direction of introgression using generalized linear mixed effects models. We determined that introgressive hybridization occurs at a global rate of 7.8% and that variation was mostly explained by plots (frequency at low altitude was approximately twice that found at high altitude), while it was less influenced by subplots. The high altitude plot was dominated by late-generation backcrosses to N. obliqua (asymmetric bimodality), whereas the low altitude plot consisted of intermediate hybrids (unimodality) and showed asymmetry for introgression between subplots. Differences were not detected between adults and regeneration, suggesting early-acting reproductive isolating barriers. F1 hybrids occur at a global frequency of 3.8%, and are fertile, as the detection of first- and late-generation hybrids indicates.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherSpringer-Verlag Berlin Heidelberges_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceTree Genetics & Genomes 13 : 49 (April 2017)es_AR
dc.subjectNothofaguses_AR
dc.subjectHibridaciónes_AR
dc.subjectHybridizationeng
dc.subjectBosques
dc.subjectForestseng
dc.subject.otherNothofagus Nervosaes_AR
dc.subject.otherNothofagus Obliquaes_AR
dc.subject.otherGradientes Altitudinaleses_AR
dc.subject.otherGenética Forestales_AR
dc.subject.otherRegión Patagónicaes_AR
dc.titlePattern of natural introgression in a Nothofagus hybrid zone from South American temperate forestses_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: El Mujtar, Veronica Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Sistemas Forestales. Unidad de Genética Ecológica y Mejoramiento Forestal; Argentinaes_AR
dc.description.filFil: Sola, Georgina Giselle. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Patagonia Norte; Argentina. Universidad Nacional del Comahue. Cátedra de Ordenación Forestal; Argentinaes_AR
dc.description.filFil: Aparicio, Alejandro Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Sistemas 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 Sistemas Forestales. Unidad de Genética Ecológica y Mejoramiento Forestal; Argentinaes_AR
dc.subtypecientifico


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