Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica
The Patagonian region is characterized by a complex biogeographic history, with evidence of deep phylogeographic breaks shared among species. Of particular interest to conservation is the nature of colonization and settlement patterns after the last glacial period, including the detection of seconda...
| Main Authors: | , , , , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
2017
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| Online Access: | http://hdl.handle.net/20.500.12123/1273 http://www.sciencedirect.com/science/article/pii/S105579031500010X https://doi.org/10.1016/j.ympev.2015.01.006 |
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| author | Soliani, Carolina Tsuda, Yoshiaki Bagnoli, Francesca Gallo, Leonardo Ariel Vendramin, Giovanni Giuseppe Marchelli, Paula |
| author_browse | Bagnoli, Francesca Gallo, Leonardo Ariel Marchelli, Paula Soliani, Carolina Tsuda, Yoshiaki Vendramin, Giovanni Giuseppe |
| author_facet | Soliani, Carolina Tsuda, Yoshiaki Bagnoli, Francesca Gallo, Leonardo Ariel Vendramin, Giovanni Giuseppe Marchelli, Paula |
| author_sort | Soliani, Carolina |
| collection | INTA Digital |
| description | The Patagonian region is characterized by a complex biogeographic history, with evidence of deep phylogeographic breaks shared among species. Of particular interest to conservation is the nature of colonization and settlement patterns after the last glacial period, including the detection of secondary contact between different lineages and/or hybridization among related species around phylogeographic breaks. Here we studied population demography and past hybridization of two widespread tree species endemic to South America, Nothofagus pumilio and N. antarctica.
Using 8 nuclear microsatellites we genotyped 41 populations of both species. Genetic variation and structure across the geographic region were evaluated within and among species and the past demographic history of hybridization between the two species was inferred using Approximate Bayesian Computation (ABC).
Northern and southern lineages were identified in each species, and Bayesian clustering revealed their convergence at mid latitudes (42°S). Spatial genetic structure (SGS) also indicated the existence of a genetic discontinuity at these latitudes, which is in agreement with previous data from maternal DNA markers. Several populations around 42–44°S presented high levels of genetic diversity with a decrease toward southern populations. Even though the species are clearly differentiated (G’ST = 0.335), admixed gene pools were observed in both species. Two independent runs of ABC suggested that inter species admixture-like patterns occurred within the timescale of the Last Glacial Maximum (around 20,000 BP). We also provide evidences of recent and bi-directional hybridization/introgression between the two Nothofagus species and describe features of the populationś demography in the past. The settlement of a secondary contact zone in Nothofagus species around 42–44°S coincides with the phylogeographic breaks and hotspots of genetic diversity found in other plant and animal species in Patagonia, highlighting its importance as reservoir of diversity. The characterization of the population history of native species can contribute substantially to long-term conservation and management policies. |
| format | Artículo |
| id | INTA1273 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | INTA12732018-06-26T18:09:56Z Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica Soliani, Carolina Tsuda, Yoshiaki Bagnoli, Francesca Gallo, Leonardo Ariel Vendramin, Giovanni Giuseppe Marchelli, Paula Nothofagus Pumilio Colonización Distribución Geográfica Rural Settlement Geographical Distribution Región Patagónica Nothofagus Antarctica Colonization The Patagonian region is characterized by a complex biogeographic history, with evidence of deep phylogeographic breaks shared among species. Of particular interest to conservation is the nature of colonization and settlement patterns after the last glacial period, including the detection of secondary contact between different lineages and/or hybridization among related species around phylogeographic breaks. Here we studied population demography and past hybridization of two widespread tree species endemic to South America, Nothofagus pumilio and N. antarctica. Using 8 nuclear microsatellites we genotyped 41 populations of both species. Genetic variation and structure across the geographic region were evaluated within and among species and the past demographic history of hybridization between the two species was inferred using Approximate Bayesian Computation (ABC). Northern and southern lineages were identified in each species, and Bayesian clustering revealed their convergence at mid latitudes (42°S). Spatial genetic structure (SGS) also indicated the existence of a genetic discontinuity at these latitudes, which is in agreement with previous data from maternal DNA markers. Several populations around 42–44°S presented high levels of genetic diversity with a decrease toward southern populations. Even though the species are clearly differentiated (G’ST = 0.335), admixed gene pools were observed in both species. Two independent runs of ABC suggested that inter species admixture-like patterns occurred within the timescale of the Last Glacial Maximum (around 20,000 BP). We also provide evidences of recent and bi-directional hybridization/introgression between the two Nothofagus species and describe features of the populationś demography in the past. The settlement of a secondary contact zone in Nothofagus species around 42–44°S coincides with the phylogeographic breaks and hotspots of genetic diversity found in other plant and animal species in Patagonia, highlighting its importance as reservoir of diversity. The characterization of the population history of native species can contribute substantially to long-term conservation and management policies. Fil: Soliani, Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Tsuda, Yoshiaki. Uppsala University. Evolutionary Biology Centre. Department of Ecology and Genetics; Suecia Fil: Bagnoli, Francesca. Consiglio Nazionale delle Ricerche. Istituto di Bioscienze e Biorisorse; Italia Fil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Vendramin, Giovanni Giuseppe. Consiglio Nazionale delle Ricerche. Istituto di Bioscienze e Biorisorse; Italia Fil: Marchelli, PaulaInstituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2017-09-20T15:50:35Z 2017-09-20T15:50:35Z 2015-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/1273 http://www.sciencedirect.com/science/article/pii/S105579031500010X 1055-7903 https://doi.org/10.1016/j.ympev.2015.01.006 eng info:eu-repo/semantics/restrictedAccess application/pdf Patagonia (general region) Molecular phylogenetics and evolution 85 : 197-207. (April 2015) |
| spellingShingle | Nothofagus Pumilio Colonización Distribución Geográfica Rural Settlement Geographical Distribution Región Patagónica Nothofagus Antarctica Colonization Soliani, Carolina Tsuda, Yoshiaki Bagnoli, Francesca Gallo, Leonardo Ariel Vendramin, Giovanni Giuseppe Marchelli, Paula Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title | Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title_full | Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title_fullStr | Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title_full_unstemmed | Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title_short | Halfway encounters: Meeting points of colonization routes among the southern beeches Nothofagus pumilio and N. antarctica |
| title_sort | halfway encounters meeting points of colonization routes among the southern beeches nothofagus pumilio and n antarctica |
| topic | Nothofagus Pumilio Colonización Distribución Geográfica Rural Settlement Geographical Distribution Región Patagónica Nothofagus Antarctica Colonization |
| url | http://hdl.handle.net/20.500.12123/1273 http://www.sciencedirect.com/science/article/pii/S105579031500010X https://doi.org/10.1016/j.ympev.2015.01.006 |
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