Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.)
- How genomic selection enables species to adapt to divergent environments is a fundamental question in ecology and evolution. We investigated the genomic signatures of local adaptation in Atlantic cod (Gadus morhua L.) along a natural salinity gradient, ranging from 35‰ in the North Sea to 7‰ withi...
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Online Access: | http://hdl.handle.net/11250/2374233 https://doi.org/10.1093/gbe/evv093 |
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ftimr:oai:imr.brage.unit.no:11250/2374233 2023-05-15T15:26:56+02:00 Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) Berg, Paul Ragnar Jentoft, Sissel Star, Bastiaan Ring, Kristoffer Hofaker Knutsen, Halvor Lien, Sigbjørn Jakobsen, Kjetill Sigurd Andre, Carl 2015-12-03T14:32:30Z application/pdf http://hdl.handle.net/11250/2374233 https://doi.org/10.1093/gbe/evv093 eng eng Oxford Journals Paul R. Berg, Sissel Jentoft, Bastiaan Star, Kristoffer H. Ring, Halvor Knutsen, Sigbjørn Lien, Kjetill S. Jakobsen, and Carl André (2015) Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) Genome Biol Evol Vol. 7 1644-1663 doi:10.1093/gbe/evv093 urn:issn:1759-6653 http://hdl.handle.net/11250/2374233 https://doi.org/10.1093/gbe/evv093 cristin:1260454 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ CC-BY 1644-1663 7 Genome Biology and Evolution VDP::Mathematics and natural science: 400::Basic biosciences: 470::Genetics and genomics: 474 Journal article Peer reviewed 2015 ftimr https://doi.org/10.1093/gbe/evv093 2021-09-23T20:14:59Z - How genomic selection enables species to adapt to divergent environments is a fundamental question in ecology and evolution. We investigated the genomic signatures of local adaptation in Atlantic cod (Gadus morhua L.) along a natural salinity gradient, ranging from 35‰ in the North Sea to 7‰ within the Baltic Sea. By utilizing a 12 K SNPchip, we simultaneously assessed neutral and adaptive genetic divergence across the Atlantic cod genome. Combining outlier analyses with a landscape genomic approach, we identified a set of directionally selected loci that are strongly correlated with habitat differences in salinity, oxygen, and temperature. Our results show that discrete regions within the Atlantic cod genome are subject to directional selection and associated with adaptation to the local environmental conditions in the Baltic- and the North Sea, indicating divergence hitchhiking and the presence of genomic islands of divergence. We report a suite of outlier single nucleotide polymorphisms within or closely located to genes associated with osmoregulation, as well as genes known to play important roles in the hydration and development of oocytes. These genes are likely to have key functions within a general osmoregulatory framework and are important for the survival of eggs and larvae, contributing to the buildup of reproductive isolation between the low-salinity adapted Baltic cod and the adjacent cod populations. Hence, our data suggest that adaptive responses to the environmental conditions in the Baltic Sea may contribute to a strong and effective reproductive barrier, and that Baltic cod can be viewed as an example of ongoing speciation. Article in Journal/Newspaper atlantic cod Gadus morhua Institute for Marine Research: Brage IMR Genome Biology and Evolution 7 6 1644 1663 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Basic biosciences: 470::Genetics and genomics: 474 |
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VDP::Mathematics and natural science: 400::Basic biosciences: 470::Genetics and genomics: 474 Berg, Paul Ragnar Jentoft, Sissel Star, Bastiaan Ring, Kristoffer Hofaker Knutsen, Halvor Lien, Sigbjørn Jakobsen, Kjetill Sigurd Andre, Carl Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
topic_facet |
VDP::Mathematics and natural science: 400::Basic biosciences: 470::Genetics and genomics: 474 |
description |
- How genomic selection enables species to adapt to divergent environments is a fundamental question in ecology and evolution. We investigated the genomic signatures of local adaptation in Atlantic cod (Gadus morhua L.) along a natural salinity gradient, ranging from 35‰ in the North Sea to 7‰ within the Baltic Sea. By utilizing a 12 K SNPchip, we simultaneously assessed neutral and adaptive genetic divergence across the Atlantic cod genome. Combining outlier analyses with a landscape genomic approach, we identified a set of directionally selected loci that are strongly correlated with habitat differences in salinity, oxygen, and temperature. Our results show that discrete regions within the Atlantic cod genome are subject to directional selection and associated with adaptation to the local environmental conditions in the Baltic- and the North Sea, indicating divergence hitchhiking and the presence of genomic islands of divergence. We report a suite of outlier single nucleotide polymorphisms within or closely located to genes associated with osmoregulation, as well as genes known to play important roles in the hydration and development of oocytes. These genes are likely to have key functions within a general osmoregulatory framework and are important for the survival of eggs and larvae, contributing to the buildup of reproductive isolation between the low-salinity adapted Baltic cod and the adjacent cod populations. Hence, our data suggest that adaptive responses to the environmental conditions in the Baltic Sea may contribute to a strong and effective reproductive barrier, and that Baltic cod can be viewed as an example of ongoing speciation. |
format |
Article in Journal/Newspaper |
author |
Berg, Paul Ragnar Jentoft, Sissel Star, Bastiaan Ring, Kristoffer Hofaker Knutsen, Halvor Lien, Sigbjørn Jakobsen, Kjetill Sigurd Andre, Carl |
author_facet |
Berg, Paul Ragnar Jentoft, Sissel Star, Bastiaan Ring, Kristoffer Hofaker Knutsen, Halvor Lien, Sigbjørn Jakobsen, Kjetill Sigurd Andre, Carl |
author_sort |
Berg, Paul Ragnar |
title |
Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
title_short |
Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
title_full |
Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
title_fullStr |
Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
title_full_unstemmed |
Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) |
title_sort |
adaptation to low salinity promotes genomic divergence in atlantic cod (gadus morhua l.) |
publisher |
Oxford Journals |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/2374233 https://doi.org/10.1093/gbe/evv093 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
1644-1663 7 Genome Biology and Evolution |
op_relation |
Paul R. Berg, Sissel Jentoft, Bastiaan Star, Kristoffer H. Ring, Halvor Knutsen, Sigbjørn Lien, Kjetill S. Jakobsen, and Carl André (2015) Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.) Genome Biol Evol Vol. 7 1644-1663 doi:10.1093/gbe/evv093 urn:issn:1759-6653 http://hdl.handle.net/11250/2374233 https://doi.org/10.1093/gbe/evv093 cristin:1260454 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/gbe/evv093 |
container_title |
Genome Biology and Evolution |
container_volume |
7 |
container_issue |
6 |
container_start_page |
1644 |
op_container_end_page |
1663 |
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1766357406502092800 |