Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza
Aim We perform a phylogeographical study of an endemic Patagonian herbaceous plant to assess whether geographical patterns of genetic variation correspond to in situ Pleistocene survival or to glacial retreat and post-glacial expansion. We also seek to determine the locations of potential glacial re...
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ftconicet:oai:ri.conicet.gov.ar:11336/13840 2023-10-09T21:52:26+02:00 Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza Cosacov Martinez, Andrea Sersic, Alicia Noemi Sosa, Victoria Johnson, Leigh A. Cocucci, Andrea Aristides application/pdf http://hdl.handle.net/11336/13840 eng eng Wiley info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2699.2010.02307.x/abstract info:eu-repo/semantics/altIdentifier/doi/doi:10.1111/j.1365-2699.2010.02307.x http://hdl.handle.net/11336/13840 Cosacov Martinez, Andrea; Sersic, Alicia Noemi; Sosa, Victoria; Johnson, Leigh A.; Cocucci, Andrea Aristides; Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza; Wiley; Journal Of Biogeography; 37; 8; 9-2010; 1463-1477 0305-0270 1365-2699 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Arid Diagonal Zone Demographic Expansion Herbaceous Plant Patagonia Pleistocene Glaciations Secondary Contact Zone South America Volcanism https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1111/j.1365-2699.2010.02307.x 2023-09-24T20:13:33Z Aim We perform a phylogeographical study of an endemic Patagonian herbaceous plant to assess whether geographical patterns of genetic variation correspond to in situ Pleistocene survival or to glacial retreat and post-glacial expansion. We also seek to determine the locations of potential glacial refugia and post-glacial colonization routes. Location Southern Andes and Patagonian steppe. Methods We used Calceolaria polyrhiza, a widely distributed Patagonian herbaceous plant that occurs mainly in the understorey of Nothofagus rain forests and in the arid Patagonian steppe, as our model system. The chloroplast intergenic spacer trnH–psbA was sequenced for 590 individuals from 68 populations. Sequence data were analysed using phylogenetic (maximum parsimony, maximum likelihood and Bayesian inference) and population genetic (spatial analyses of molecular variance, mismatch distributions and neutrality tests) methods. Nested clade phylogeographic analyses, and divergence time estimates using a calibrated molecular clock, were also conducted. Results A total of 27 haplotypes identified in the present study clustered into four primary genealogical lineages, revealing three significant latitudinal phylogeographical breaks. The two high Andean lineages probably split first, during the late Miocene, and the Patagonian lineage split around 4 Ma, coincident with the establishment of the Patagonian steppe. Within each haplogroup, major diversification occurred in the Pleistocene. The Patagonian groups show a pattern consistent with a rapid post-glacial expansion and colonization of the Andean flanks, achieved independently by four lineages. The highest haplotype diversity was found along a longitudinal transect that is remarkably congruent with the limit of the ice-sheet extension during the Greatest Patagonian Glaciation. A north-east expansion is evident, which is probably associated with the ‘Arid Diagonal’ fluctuations. Main conclusions Glacial climate fluctuations had a substantial impact on the diversification, ... Article in Journal/Newspaper Ice Sheet CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Journal of Biogeography no no |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Arid Diagonal Zone Demographic Expansion Herbaceous Plant Patagonia Pleistocene Glaciations Secondary Contact Zone South America Volcanism https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Arid Diagonal Zone Demographic Expansion Herbaceous Plant Patagonia Pleistocene Glaciations Secondary Contact Zone South America Volcanism https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Cosacov Martinez, Andrea Sersic, Alicia Noemi Sosa, Victoria Johnson, Leigh A. Cocucci, Andrea Aristides Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
topic_facet |
Arid Diagonal Zone Demographic Expansion Herbaceous Plant Patagonia Pleistocene Glaciations Secondary Contact Zone South America Volcanism https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Aim We perform a phylogeographical study of an endemic Patagonian herbaceous plant to assess whether geographical patterns of genetic variation correspond to in situ Pleistocene survival or to glacial retreat and post-glacial expansion. We also seek to determine the locations of potential glacial refugia and post-glacial colonization routes. Location Southern Andes and Patagonian steppe. Methods We used Calceolaria polyrhiza, a widely distributed Patagonian herbaceous plant that occurs mainly in the understorey of Nothofagus rain forests and in the arid Patagonian steppe, as our model system. The chloroplast intergenic spacer trnH–psbA was sequenced for 590 individuals from 68 populations. Sequence data were analysed using phylogenetic (maximum parsimony, maximum likelihood and Bayesian inference) and population genetic (spatial analyses of molecular variance, mismatch distributions and neutrality tests) methods. Nested clade phylogeographic analyses, and divergence time estimates using a calibrated molecular clock, were also conducted. Results A total of 27 haplotypes identified in the present study clustered into four primary genealogical lineages, revealing three significant latitudinal phylogeographical breaks. The two high Andean lineages probably split first, during the late Miocene, and the Patagonian lineage split around 4 Ma, coincident with the establishment of the Patagonian steppe. Within each haplogroup, major diversification occurred in the Pleistocene. The Patagonian groups show a pattern consistent with a rapid post-glacial expansion and colonization of the Andean flanks, achieved independently by four lineages. The highest haplotype diversity was found along a longitudinal transect that is remarkably congruent with the limit of the ice-sheet extension during the Greatest Patagonian Glaciation. A north-east expansion is evident, which is probably associated with the ‘Arid Diagonal’ fluctuations. Main conclusions Glacial climate fluctuations had a substantial impact on the diversification, ... |
format |
Article in Journal/Newspaper |
author |
Cosacov Martinez, Andrea Sersic, Alicia Noemi Sosa, Victoria Johnson, Leigh A. Cocucci, Andrea Aristides |
author_facet |
Cosacov Martinez, Andrea Sersic, Alicia Noemi Sosa, Victoria Johnson, Leigh A. Cocucci, Andrea Aristides |
author_sort |
Cosacov Martinez, Andrea |
title |
Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
title_short |
Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
title_full |
Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
title_fullStr |
Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
title_full_unstemmed |
Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza |
title_sort |
multiple periglacial refugia in the patagonian steppe and post-glacial colonization of the andes: the phylogeography of calceolaria polyrhiza |
publisher |
Wiley |
url |
http://hdl.handle.net/11336/13840 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2699.2010.02307.x/abstract info:eu-repo/semantics/altIdentifier/doi/doi:10.1111/j.1365-2699.2010.02307.x http://hdl.handle.net/11336/13840 Cosacov Martinez, Andrea; Sersic, Alicia Noemi; Sosa, Victoria; Johnson, Leigh A.; Cocucci, Andrea Aristides; Multiple periglacial refugia in the Patagonian steppe and post-glacial colonization of the Andes: the phylogeography of Calceolaria polyrhiza; Wiley; Journal Of Biogeography; 37; 8; 9-2010; 1463-1477 0305-0270 1365-2699 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1111/j.1365-2699.2010.02307.x |
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Journal of Biogeography |
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no |
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1779315596149653504 |