Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota)
Historical and contemporary geographical distribution ranges with their associated gene flow patterns interact to produce the genetic diversity observed today. Often it is not possible to separate out the impacts of historical events, e.g. past fragmentation, and contemporary gene flow, e.g. long-di...
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ftopenagrar:oai:www.openagrar.de:timport_mods_00018146 2024-09-15T17:57:05+00:00 Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) Buschbom, Jutta 2007 11 https://doi.org/10.1111/j.1365-294X.2007.03258.x https://www.openagrar.de/receive/timport_mods_00018146 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018146/dn056767.pdf eng eng Molecular Ecology -- Mol Ecol -- 1365-294X -- 0962-1083 -- 10.1111/(ISSN)1365-294X -- 2020749-9 -- 1126687-9 -- https://onlinelibrary.wiley.com/journal/1365294X -- http://www.bibliothek.uni-regensburg.de/ezeit/?2020749 -- http://dx.doi.org/10.1111/(ISSN)1365-294X https://doi.org/DOI:10.1111/j.1365-294X.2007.03258.x https://www.openagrar.de/receive/timport_mods_00018146 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018146/dn056767.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text geographical structure isolation by distance long-distance dispersal migration rates population history Porpidia article Text doc-type:article 2007 ftopenagrar https://doi.org/10.1111/j.1365-294X.2007.03258.x10.1111/(ISSN)1365-294X 2024-07-08T23:56:24Z Historical and contemporary geographical distribution ranges with their associated gene flow patterns interact to produce the genetic diversity observed today. Often it is not possible to separate out the impacts of historical events, e.g. past fragmentation, and contemporary gene flow, e.g. long-distance dispersal. Porpidia flavicunda is a lichen-forming ascomycete occurring circumpolar in the boreal to arctic zones for which vegetation history suggests that its distribution pattern has stayed broadly the same over the past millennia. DNA-sequence diversity in P. flavicunda can, thus, be expected to predominantly represent geographical population differentiation and its contemporary migration rates. The population sample consists of 110 specimens collected in Northern Québec, Baffin Island, Western Greenland and Northern Scandinavia. DNA-sequence data sets of three nuclear gene fragments (LSU, RPB2 and ß-tubulin) were analysed for genetic diversity within, and differentiation between, geographical regions. Tests of population subdivision employing analyses of molecular variance and exact tests of haplotype frequency distributions showed significant structure between the geographical regions. However, the lack of fixed nucleotide polymorphisms and the wide sharing of identical haplotypes between geographical regions suggest recurrent long-distance gene flow of propagules. Still, the means by which propagules are dispersed remain to be discovered. Inference of migration rates shows that in many cases a sufficiently high amount of migrants is exchanged between geographical regions to prevent drastic population differentiation through genetic drift. The observed haplotype distributions and migration rates point to a gene flow model of isolation by distance. Article in Journal/Newspaper Baffin Island Baffin Greenland OpenAgrar (OA) Molecular Ecology 16 9 1835 1846 |
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Open Polar |
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ftopenagrar |
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English |
topic |
article Text geographical structure isolation by distance long-distance dispersal migration rates population history Porpidia |
spellingShingle |
article Text geographical structure isolation by distance long-distance dispersal migration rates population history Porpidia Buschbom, Jutta Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
topic_facet |
article Text geographical structure isolation by distance long-distance dispersal migration rates population history Porpidia |
description |
Historical and contemporary geographical distribution ranges with their associated gene flow patterns interact to produce the genetic diversity observed today. Often it is not possible to separate out the impacts of historical events, e.g. past fragmentation, and contemporary gene flow, e.g. long-distance dispersal. Porpidia flavicunda is a lichen-forming ascomycete occurring circumpolar in the boreal to arctic zones for which vegetation history suggests that its distribution pattern has stayed broadly the same over the past millennia. DNA-sequence diversity in P. flavicunda can, thus, be expected to predominantly represent geographical population differentiation and its contemporary migration rates. The population sample consists of 110 specimens collected in Northern Québec, Baffin Island, Western Greenland and Northern Scandinavia. DNA-sequence data sets of three nuclear gene fragments (LSU, RPB2 and ß-tubulin) were analysed for genetic diversity within, and differentiation between, geographical regions. Tests of population subdivision employing analyses of molecular variance and exact tests of haplotype frequency distributions showed significant structure between the geographical regions. However, the lack of fixed nucleotide polymorphisms and the wide sharing of identical haplotypes between geographical regions suggest recurrent long-distance gene flow of propagules. Still, the means by which propagules are dispersed remain to be discovered. Inference of migration rates shows that in many cases a sufficiently high amount of migrants is exchanged between geographical regions to prevent drastic population differentiation through genetic drift. The observed haplotype distributions and migration rates point to a gene flow model of isolation by distance. |
format |
Article in Journal/Newspaper |
author |
Buschbom, Jutta |
author_facet |
Buschbom, Jutta |
author_sort |
Buschbom, Jutta |
title |
Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
title_short |
Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
title_full |
Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
title_fullStr |
Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
title_full_unstemmed |
Migration between continents: geographical structure and long-distance gene flow inPorpidia flavicunda(lichen-forming Ascomycota) |
title_sort |
migration between continents: geographical structure and long-distance gene flow inporpidia flavicunda(lichen-forming ascomycota) |
publishDate |
2007 |
url |
https://doi.org/10.1111/j.1365-294X.2007.03258.x https://www.openagrar.de/receive/timport_mods_00018146 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018146/dn056767.pdf |
genre |
Baffin Island Baffin Greenland |
genre_facet |
Baffin Island Baffin Greenland |
op_relation |
Molecular Ecology -- Mol Ecol -- 1365-294X -- 0962-1083 -- 10.1111/(ISSN)1365-294X -- 2020749-9 -- 1126687-9 -- https://onlinelibrary.wiley.com/journal/1365294X -- http://www.bibliothek.uni-regensburg.de/ezeit/?2020749 -- http://dx.doi.org/10.1111/(ISSN)1365-294X https://doi.org/DOI:10.1111/j.1365-294X.2007.03258.x https://www.openagrar.de/receive/timport_mods_00018146 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018146/dn056767.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-294X.2007.03258.x10.1111/(ISSN)1365-294X |
container_title |
Molecular Ecology |
container_volume |
16 |
container_issue |
9 |
container_start_page |
1835 |
op_container_end_page |
1846 |
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1810433275943976960 |