Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears.
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 th...
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2015
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ftcdlib:oai:escholarship.org/ark:/13030/qt3669x0s0 2023-05-15T14:57:56+02:00 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 1205 - 1217 2015-03-01 https://escholarship.org/uc/item/3669x0s0 unknown eScholarship, University of California qt3669x0s0 https://escholarship.org/uc/item/3669x0s0 public Molecular ecology, vol 24, iss 6 X Chromosome Animals Ursidae Sequence Analysis DNA Genetics Population Evolution Molecular Phylogeny Alaska Arctic Regions Europe Female Male Gene Flow Ursus brown bear ecological genetics genomics hybridization polar bear Evolutionary Biology Biological Sciences article 2015 ftcdlib 2020-01-31T23:54:04Z 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 polar bear Alaska University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
X Chromosome Animals Ursidae Sequence Analysis DNA Genetics Population Evolution Molecular Phylogeny Alaska Arctic Regions Europe Female Male Gene Flow Ursus brown bear ecological genetics genomics hybridization polar bear Evolutionary Biology Biological Sciences |
spellingShingle |
X Chromosome Animals Ursidae Sequence Analysis DNA Genetics Population Evolution Molecular Phylogeny Alaska Arctic Regions Europe Female Male Gene Flow Ursus brown bear ecological genetics genomics hybridization polar bear Evolutionary Biology Biological Sciences 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. |
topic_facet |
X Chromosome Animals Ursidae Sequence Analysis DNA Genetics Population Evolution Molecular Phylogeny Alaska Arctic Regions Europe Female Male Gene Flow Ursus brown bear ecological genetics genomics hybridization polar bear Evolutionary Biology Biological Sciences |
description |
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. |
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 |
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 |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/3669x0s0 |
op_coverage |
1205 - 1217 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic brown bear polar bear Alaska |
genre_facet |
Arctic brown bear polar bear Alaska |
op_source |
Molecular ecology, vol 24, iss 6 |
op_relation |
qt3669x0s0 https://escholarship.org/uc/item/3669x0s0 |
op_rights |
public |
_version_ |
1766330033213800448 |