A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages
Abstract Analysing the geographical distribution of evolutionary linages can reveal the potential locations of past refugia and colonisation routes and thus can improve understanding of current patterns of genetic variation and adaptive potential. We analysed 94 full mitogenome sequences to assess p...
Published in: | Ecology of Freshwater Fish |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12633 |
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crwiley:10.1111/eff.12633 2024-06-02T08:00:25+00:00 A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages Jacobsen, Magnus W. Jensen, Nana W. Nygaard, Rasmus Præbel, Kim Jónsson, Bjarni Nielsen, Nynne Hjort Pujolar, Jose M. Fraser, Dylan J. Bernatchez, Louis Hansen, Michael M. 2021 http://dx.doi.org/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12633 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 31, issue 2, page 330-346 ISSN 0906-6691 1600-0633 journal-article 2021 crwiley https://doi.org/10.1111/eff.12633 2024-05-03T12:01:42Z Abstract Analysing the geographical distribution of evolutionary linages can reveal the potential locations of past refugia and colonisation routes and thus can improve understanding of current patterns of genetic variation and adaptive potential. We analysed 94 full mitogenome sequences to assess phylogeographic relationships amongst ten Arctic char ( Salvelinus alpinus ) populations, from western Greenland, eastern Greenland, Iceland and Norway. In addition, we excised D‐loop sequences, which were combined with previously published data in order to provide a circumpolar phylogeographical overview. In western Greenland, a secondary contact zone between Arctic and Atlantic evolutionary lineages was identified, spanning >1000 km, which geographically parallels a similar contact zone in Labrador, Canada. In eastern Greenland, Iceland and Norway, the Atlantic lineage was exclusively observed, whereas the northernmost western Greenland populations belonged to the Arctic lineage. The Arctic and Atlantic lineages were estimated to have diverged ca. 400,000 years BP, corresponding to the onset of the Saale glaciation, whereas the time of the most recent common ancestor (TMRCA) of the Arctic lineage was ca. 15,000 years BP. The Atlantic lineage comprised two subclades, with an estimated TMRCA of 60,000 BP, suggesting a complex history involving cryptic refugia or multiple recolonisations. Codon‐based tests revealed no evidence for positive selection within the 13 coding genes, indicating that there are no mitochondrial genetic adaptations within or between lineages. Higher genetic diversity observed within the contact zone likely correlates with higher standing genetic variation that could contribute to adaptive responses and morphological diversification, which Arctic char is renowned. Article in Journal/Newspaper Arctic Greenland Iceland Salvelinus alpinus Wiley Online Library Arctic Canada Greenland Norway Ecology of Freshwater Fish 31 2 330 346 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Analysing the geographical distribution of evolutionary linages can reveal the potential locations of past refugia and colonisation routes and thus can improve understanding of current patterns of genetic variation and adaptive potential. We analysed 94 full mitogenome sequences to assess phylogeographic relationships amongst ten Arctic char ( Salvelinus alpinus ) populations, from western Greenland, eastern Greenland, Iceland and Norway. In addition, we excised D‐loop sequences, which were combined with previously published data in order to provide a circumpolar phylogeographical overview. In western Greenland, a secondary contact zone between Arctic and Atlantic evolutionary lineages was identified, spanning >1000 km, which geographically parallels a similar contact zone in Labrador, Canada. In eastern Greenland, Iceland and Norway, the Atlantic lineage was exclusively observed, whereas the northernmost western Greenland populations belonged to the Arctic lineage. The Arctic and Atlantic lineages were estimated to have diverged ca. 400,000 years BP, corresponding to the onset of the Saale glaciation, whereas the time of the most recent common ancestor (TMRCA) of the Arctic lineage was ca. 15,000 years BP. The Atlantic lineage comprised two subclades, with an estimated TMRCA of 60,000 BP, suggesting a complex history involving cryptic refugia or multiple recolonisations. Codon‐based tests revealed no evidence for positive selection within the 13 coding genes, indicating that there are no mitochondrial genetic adaptations within or between lineages. Higher genetic diversity observed within the contact zone likely correlates with higher standing genetic variation that could contribute to adaptive responses and morphological diversification, which Arctic char is renowned. |
format |
Article in Journal/Newspaper |
author |
Jacobsen, Magnus W. Jensen, Nana W. Nygaard, Rasmus Præbel, Kim Jónsson, Bjarni Nielsen, Nynne Hjort Pujolar, Jose M. Fraser, Dylan J. Bernatchez, Louis Hansen, Michael M. |
spellingShingle |
Jacobsen, Magnus W. Jensen, Nana W. Nygaard, Rasmus Præbel, Kim Jónsson, Bjarni Nielsen, Nynne Hjort Pujolar, Jose M. Fraser, Dylan J. Bernatchez, Louis Hansen, Michael M. A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
author_facet |
Jacobsen, Magnus W. Jensen, Nana W. Nygaard, Rasmus Præbel, Kim Jónsson, Bjarni Nielsen, Nynne Hjort Pujolar, Jose M. Fraser, Dylan J. Bernatchez, Louis Hansen, Michael M. |
author_sort |
Jacobsen, Magnus W. |
title |
A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
title_short |
A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
title_full |
A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
title_fullStr |
A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
title_full_unstemmed |
A melting pot in the Arctic: Analysis of mitogenome variation in Arctic char ( Salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
title_sort |
melting pot in the arctic: analysis of mitogenome variation in arctic char ( salvelinus alpinus) reveals a 1000‐km contact zone between highly divergent lineages |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12633 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12633 |
geographic |
Arctic Canada Greenland Norway |
geographic_facet |
Arctic Canada Greenland Norway |
genre |
Arctic Greenland Iceland Salvelinus alpinus |
genre_facet |
Arctic Greenland Iceland Salvelinus alpinus |
op_source |
Ecology of Freshwater Fish volume 31, issue 2, page 330-346 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12633 |
container_title |
Ecology of Freshwater Fish |
container_volume |
31 |
container_issue |
2 |
container_start_page |
330 |
op_container_end_page |
346 |
_version_ |
1800744424280424448 |