Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears
Abstract Polar bears are an arctic, marine adapted species that is closely related to brown bears. Genome analyses have shown that polar bears are distinct and genetically homogeneous in comparison to brown bears. However, these analyses have also revealed a remarkable episode of polar bear gene flo...
Published in: | Molecular Ecology |
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crwiley:10.1111/mec.13038 2024-10-13T14:05:25+00:00 Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears Cahill, James A. Stirling, Ian Kistler, Logan Salamzade, Rauf Ersmark, Erik Fulton, Tara L. Stiller, Mathias Green, Richard E. Shapiro, Beth Packard Foundation Searle Scholars Program Gordon and Betty Moore Foundation 2015 http://dx.doi.org/10.1111/mec.13038 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.13038 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.13038 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mec.13038 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 24, issue 6, page 1205-1217 ISSN 0962-1083 1365-294X journal-article 2015 crwiley https://doi.org/10.1111/mec.13038 2024-09-23T04:35:22Z Abstract Polar bears are an arctic, marine adapted species that is closely related to brown bears. Genome analyses have shown that polar bears are distinct and genetically homogeneous in comparison to brown bears. However, these analyses have also revealed a remarkable episode of polar bear gene flow into the population of brown bears that colonized the Admiralty, Baranof and Chichagof islands ( ABC islands) of Alaska. Here, we present an analysis of data from a large panel of polar bear and brown bear genomes that includes brown bears from the ABC islands, the Alaskan mainland and Europe. Our results provide clear evidence that gene flow between the two species had a geographically wide impact, with polar bear DNA found within the genomes of brown bears living both on the ABC islands and in the Alaskan mainland. Intriguingly, while brown bear genomes contain up to 8.8% polar bear ancestry, polar bear genomes appear to be devoid of brown bear ancestry, suggesting the presence of a barrier to gene flow in that direction. Article in Journal/Newspaper Arctic brown bear Alaska Wiley Online Library Arctic Molecular Ecology 24 6 1205 1217 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Polar bears are an arctic, marine adapted species that is closely related to brown bears. Genome analyses have shown that polar bears are distinct and genetically homogeneous in comparison to brown bears. However, these analyses have also revealed a remarkable episode of polar bear gene flow into the population of brown bears that colonized the Admiralty, Baranof and Chichagof islands ( ABC islands) of Alaska. Here, we present an analysis of data from a large panel of polar bear and brown bear genomes that includes brown bears from the ABC islands, the Alaskan mainland and Europe. Our results provide clear evidence that gene flow between the two species had a geographically wide impact, with polar bear DNA found within the genomes of brown bears living both on the ABC islands and in the Alaskan mainland. Intriguingly, while brown bear genomes contain up to 8.8% polar bear ancestry, polar bear genomes appear to be devoid of brown bear ancestry, suggesting the presence of a barrier to gene flow in that direction. |
author2 |
Packard Foundation Searle Scholars Program Gordon and Betty Moore Foundation |
format |
Article in Journal/Newspaper |
author |
Cahill, James A. Stirling, Ian Kistler, Logan Salamzade, Rauf Ersmark, Erik Fulton, Tara L. Stiller, Mathias Green, Richard E. Shapiro, Beth |
spellingShingle |
Cahill, James A. Stirling, Ian Kistler, Logan Salamzade, Rauf Ersmark, Erik Fulton, Tara L. Stiller, Mathias Green, Richard E. Shapiro, Beth Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
author_facet |
Cahill, James A. Stirling, Ian Kistler, Logan Salamzade, Rauf Ersmark, Erik Fulton, Tara L. Stiller, Mathias Green, Richard E. Shapiro, Beth |
author_sort |
Cahill, James A. |
title |
Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
title_short |
Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
title_full |
Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
title_fullStr |
Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
title_full_unstemmed |
Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
title_sort |
genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/mec.13038 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.13038 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.13038 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mec.13038 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic brown bear Alaska |
genre_facet |
Arctic brown bear Alaska |
op_source |
Molecular Ecology volume 24, issue 6, page 1205-1217 ISSN 0962-1083 1365-294X |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/mec.13038 |
container_title |
Molecular Ecology |
container_volume |
24 |
container_issue |
6 |
container_start_page |
1205 |
op_container_end_page |
1217 |
_version_ |
1812811510685106176 |