Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow
Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially along climatic gradients, becomes critical to inform management, conservatio...
| Autores principales: | , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/7038 https://doi.org/10.1016/j.envexpbot.2019.103933 |
| _version_ | 1855483930340229120 |
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| author | Lopez, Aldana Soledad Lopez, Dardo Ruben Caballe, Gonzalo Siffredi, Guillermo Lorenzo Marchelli, Paula |
| author_browse | Caballe, Gonzalo Lopez, Aldana Soledad Lopez, Dardo Ruben Marchelli, Paula Siffredi, Guillermo Lorenzo |
| author_facet | Lopez, Aldana Soledad Lopez, Dardo Ruben Caballe, Gonzalo Siffredi, Guillermo Lorenzo Marchelli, Paula |
| author_sort | Lopez, Aldana Soledad |
| collection | INTA Digital |
| description | Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially along climatic gradients, becomes critical to inform management, conservation and restoration efforts. We combine the analysis of neutral (microsatellites) and adaptive divergence (morphological traits in common garden experiments) between populations along a sharp precipitation gradient in the native Patagonian grass Festuca pallescens, to disentangle patterns of local adaptation and genetic diversity. The identification of genetically based traits under divergent selection denoted the existence of local adaptation in spite of extensive gene flow. Two plant growth patterns were detected associated with two ecological regions. In arid environments, a trade-off between not resigning foliage production, and reducing the exposure to drying agents resulted in a compacted plant architecture; while in dry subhumid environments, populations exhibited a wide architecture to cope with rainfall and radiation interception. Increasing aridity and grazing might favor a compact plant architecture, and fragmentation might reduce genetic diversity across these environments. Being a widely
distributed species, F. pallescens is an excellent model species to study adaptive responses across environmental gradients facing climate change predictions, especially in dryland rangelands that maintain multiple ecosystem functions. |
| format | Artículo |
| id | INTA7038 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA70382020-04-06T12:26:30Z Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow Lopez, Aldana Soledad Lopez, Dardo Ruben Caballe, Gonzalo Siffredi, Guillermo Lorenzo Marchelli, Paula Festuca Variación Genética Adaptación Zona Árida Zona Semiárida Pastizales Cambio Climático Genetic Variation Adaptation Arid Zones Semiarid Zones Pastures Climate Change Festuca Pallescens Gradientes de Precipitaciones Región Patagónica Environmental Gradients Phenotypic Variation Neutral Genetic Diversity Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially along climatic gradients, becomes critical to inform management, conservation and restoration efforts. We combine the analysis of neutral (microsatellites) and adaptive divergence (morphological traits in common garden experiments) between populations along a sharp precipitation gradient in the native Patagonian grass Festuca pallescens, to disentangle patterns of local adaptation and genetic diversity. The identification of genetically based traits under divergent selection denoted the existence of local adaptation in spite of extensive gene flow. Two plant growth patterns were detected associated with two ecological regions. In arid environments, a trade-off between not resigning foliage production, and reducing the exposure to drying agents resulted in a compacted plant architecture; while in dry subhumid environments, populations exhibited a wide architecture to cope with rainfall and radiation interception. Increasing aridity and grazing might favor a compact plant architecture, and fragmentation might reduce genetic diversity across these environments. Being a widely distributed species, F. pallescens is an excellent model species to study adaptive responses across environmental gradients facing climate change predictions, especially in dryland rangelands that maintain multiple ecosystem functions. Estación Experimental Agropecuaria Bariloche Fil: Lopez, Aldana Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Lopez, Dardo Ruben. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Campo Anexo Villa Dolores; Argentina Fil: Caballe, Gonzalo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Siffredi, Guillermo Lorenzo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Marchelli, Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina 2020-04-06T12:00:41Z 2020-04-06T12:00:41Z 2020-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7038 0098-8472 https://doi.org/10.1016/j.envexpbot.2019.103933 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Environmental and experimental botany 171 : 103933. (March 2020) |
| spellingShingle | Festuca Variación Genética Adaptación Zona Árida Zona Semiárida Pastizales Cambio Climático Genetic Variation Adaptation Arid Zones Semiarid Zones Pastures Climate Change Festuca Pallescens Gradientes de Precipitaciones Región Patagónica Environmental Gradients Phenotypic Variation Neutral Genetic Diversity Lopez, Aldana Soledad Lopez, Dardo Ruben Caballe, Gonzalo Siffredi, Guillermo Lorenzo Marchelli, Paula Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title | Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title_full | Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title_fullStr | Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title_full_unstemmed | Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title_short | Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow |
| title_sort | local adaptation along a sharp rainfall gradient occurs in a native patagonian grass festuca pallescens regardless of extensive gene flow |
| topic | Festuca Variación Genética Adaptación Zona Árida Zona Semiárida Pastizales Cambio Climático Genetic Variation Adaptation Arid Zones Semiarid Zones Pastures Climate Change Festuca Pallescens Gradientes de Precipitaciones Región Patagónica Environmental Gradients Phenotypic Variation Neutral Genetic Diversity |
| url | http://hdl.handle.net/20.500.12123/7038 https://doi.org/10.1016/j.envexpbot.2019.103933 |
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