Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica
Abstract Isolation of populations at the margins of a species range may lead to decreasing genetic diversity via genetic drift and inbreeding. Hybridization between peripheral populations of two species can, however, counteract genetic impoverishment. The mainly clonal, polyploid plant Saxifraga cer...
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crwiley:10.1111/j.1365-294x.2006.03024.x 2024-06-02T08:01:54+00:00 Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica KAPRALOV, MAXIM V. GABRIELSEN, TOVE M. SARAPULTSEV, IVAN E. BROCHMANN, CHRISTIAN 2006 http://dx.doi.org/10.1111/j.1365-294x.2006.03024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2006.03024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2006.03024.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 15, issue 11, page 3401-3411 ISSN 0962-1083 1365-294X journal-article 2006 crwiley https://doi.org/10.1111/j.1365-294x.2006.03024.x 2024-05-03T10:46:03Z Abstract Isolation of populations at the margins of a species range may lead to decreasing genetic diversity via genetic drift and inbreeding. Hybridization between peripheral populations of two species can, however, counteract genetic impoverishment. The mainly clonal, polyploid plant Saxifraga cernua has a wide arctic distribution but also extends southwards into alpine sites. In the Ural Mountains, its peripheral distribution overlaps with that of its sexually reproducing, diploid relative Saxifraga sibirica , and fertile polyploids of more or less intermediate appearance are found in this overlap zone. We used amplified fragment length polymorphism (AFLP) analysis to address the potential impact of interspecific gene flow on genetic diversity in the peripheral populations. A total of 149 plants from 17 populations along a 1650 km south–north gradient were analysed for 253 markers. The results suggest that three Middle Ural populations containing fertile and morphologically more or less intermediate plants have been affected by hybridization. All of these plants formed a strongly supported (100%) group with S. cernua in a neighbour‐joining tree, but their AFLP phenotypes assigned either to S. cernua or to artificial (simulated) F 1 hybrids between S. cernua and S. sibirica in multilocus assignment tests. The three populations were highly diverse with virtually every plant representing a distinct AFLP phenotype, providing additional evidence for formation of later‐generation hybrids and/or backcrossing to S. cernua . In contrast, other peripheral populations of S. cernua were typically monoclonal, suggesting that hybridization with S. sibirica can increase genetic diversity in S. cernua at its southern periphery. Article in Journal/Newspaper Arctic Saxifraga cernua Wiley Online Library Arctic Molecular Ecology 15 11 3401 3411 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Isolation of populations at the margins of a species range may lead to decreasing genetic diversity via genetic drift and inbreeding. Hybridization between peripheral populations of two species can, however, counteract genetic impoverishment. The mainly clonal, polyploid plant Saxifraga cernua has a wide arctic distribution but also extends southwards into alpine sites. In the Ural Mountains, its peripheral distribution overlaps with that of its sexually reproducing, diploid relative Saxifraga sibirica , and fertile polyploids of more or less intermediate appearance are found in this overlap zone. We used amplified fragment length polymorphism (AFLP) analysis to address the potential impact of interspecific gene flow on genetic diversity in the peripheral populations. A total of 149 plants from 17 populations along a 1650 km south–north gradient were analysed for 253 markers. The results suggest that three Middle Ural populations containing fertile and morphologically more or less intermediate plants have been affected by hybridization. All of these plants formed a strongly supported (100%) group with S. cernua in a neighbour‐joining tree, but their AFLP phenotypes assigned either to S. cernua or to artificial (simulated) F 1 hybrids between S. cernua and S. sibirica in multilocus assignment tests. The three populations were highly diverse with virtually every plant representing a distinct AFLP phenotype, providing additional evidence for formation of later‐generation hybrids and/or backcrossing to S. cernua . In contrast, other peripheral populations of S. cernua were typically monoclonal, suggesting that hybridization with S. sibirica can increase genetic diversity in S. cernua at its southern periphery. |
format |
Article in Journal/Newspaper |
author |
KAPRALOV, MAXIM V. GABRIELSEN, TOVE M. SARAPULTSEV, IVAN E. BROCHMANN, CHRISTIAN |
spellingShingle |
KAPRALOV, MAXIM V. GABRIELSEN, TOVE M. SARAPULTSEV, IVAN E. BROCHMANN, CHRISTIAN Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
author_facet |
KAPRALOV, MAXIM V. GABRIELSEN, TOVE M. SARAPULTSEV, IVAN E. BROCHMANN, CHRISTIAN |
author_sort |
KAPRALOV, MAXIM V. |
title |
Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
title_short |
Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
title_full |
Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
title_fullStr |
Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
title_full_unstemmed |
Genetic enrichment of the arctic clonal plant Saxifraga cernuaat its southern periphery via the alpine sexual Saxifraga sibirica |
title_sort |
genetic enrichment of the arctic clonal plant saxifraga cernuaat its southern periphery via the alpine sexual saxifraga sibirica |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2006.03024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2006.03024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2006.03024.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Saxifraga cernua |
genre_facet |
Arctic Saxifraga cernua |
op_source |
Molecular Ecology volume 15, issue 11, page 3401-3411 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.2006.03024.x |
container_title |
Molecular Ecology |
container_volume |
15 |
container_issue |
11 |
container_start_page |
3401 |
op_container_end_page |
3411 |
_version_ |
1800746404977573888 |