Genome architecture enables local adaptation of Atlantic cod despite high connectivity
Abstract Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species...
Published in: | Molecular Ecology |
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Online Access: | http://dx.doi.org/10.1111/mec.14207 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.14207 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.14207 |
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crwiley:10.1111/mec.14207 2024-06-23T07:51:03+00:00 Genome architecture enables local adaptation of Atlantic cod despite high connectivity Barth, Julia M. I. Berg, Paul R. Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hemmer‐Hansen, Jakob Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per‐Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel André, Carl Universitetet i Oslo Göteborgs Universitet Universitetet i Oslo MarGen Interreg, EU Göteborgs Universitet 2017 http://dx.doi.org/10.1111/mec.14207 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.14207 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.14207 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 http://creativecommons.org/licenses/by/4.0/ Molecular Ecology volume 26, issue 17, page 4452-4466 ISSN 0962-1083 1365-294X journal-article 2017 crwiley https://doi.org/10.1111/mec.14207 2024-06-13T04:25:13Z Abstract Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod ( Gadus morhua ) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key traits. By combining population genomic analyses based on 12K single nucleotide polymorphisms with larval dispersal patterns inferred using a biophysical ocean model, we show that Atlantic cod individuals residing in sheltered estuarine habitats of Scandinavian fjords mainly belong to offshore oceanic populations with considerable connectivity between these diverse ecosystems. Nevertheless, we also find evidence for discrete fjord populations that are genetically differentiated from offshore populations, indicative of local adaptation, the degree of which appears to be influenced by connectivity. Analyses of the genomic architecture reveal a significant overrepresentation of a large ~5 Mb chromosomal rearrangement in fjord cod, previously proposed to comprise genes critical for the survival at low salinities. This suggests that despite considerable connectivity with offshore populations, local adaptation to fjord environments may be enabled by suppression of recombination in the rearranged region. Our study provides new insights into the potential of local adaptation in high gene flow species within fine geographical scales and highlights the importance of genome architecture in analyses of ecological adaptation. Article in Journal/Newspaper atlantic cod Gadus morhua Wiley Online Library Molecular Ecology 26 17 4452 4466 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod ( Gadus morhua ) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key traits. By combining population genomic analyses based on 12K single nucleotide polymorphisms with larval dispersal patterns inferred using a biophysical ocean model, we show that Atlantic cod individuals residing in sheltered estuarine habitats of Scandinavian fjords mainly belong to offshore oceanic populations with considerable connectivity between these diverse ecosystems. Nevertheless, we also find evidence for discrete fjord populations that are genetically differentiated from offshore populations, indicative of local adaptation, the degree of which appears to be influenced by connectivity. Analyses of the genomic architecture reveal a significant overrepresentation of a large ~5 Mb chromosomal rearrangement in fjord cod, previously proposed to comprise genes critical for the survival at low salinities. This suggests that despite considerable connectivity with offshore populations, local adaptation to fjord environments may be enabled by suppression of recombination in the rearranged region. Our study provides new insights into the potential of local adaptation in high gene flow species within fine geographical scales and highlights the importance of genome architecture in analyses of ecological adaptation. |
author2 |
Universitetet i Oslo Göteborgs Universitet Universitetet i Oslo MarGen Interreg, EU Göteborgs Universitet |
format |
Article in Journal/Newspaper |
author |
Barth, Julia M. I. Berg, Paul R. Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hemmer‐Hansen, Jakob Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per‐Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel André, Carl |
spellingShingle |
Barth, Julia M. I. Berg, Paul R. Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hemmer‐Hansen, Jakob Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per‐Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel André, Carl Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
author_facet |
Barth, Julia M. I. Berg, Paul R. Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hemmer‐Hansen, Jakob Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per‐Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel André, Carl |
author_sort |
Barth, Julia M. I. |
title |
Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
title_short |
Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
title_full |
Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
title_fullStr |
Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
title_full_unstemmed |
Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
title_sort |
genome architecture enables local adaptation of atlantic cod despite high connectivity |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/mec.14207 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.14207 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.14207 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Molecular Ecology volume 26, issue 17, page 4452-4466 ISSN 0962-1083 1365-294X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/mec.14207 |
container_title |
Molecular Ecology |
container_volume |
26 |
container_issue |
17 |
container_start_page |
4452 |
op_container_end_page |
4466 |
_version_ |
1802642039773331456 |