Genome architecture enables local adaptation of Atlantic cod despite high connectivity
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 characte...
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Online Access: | http://hdl.handle.net/11250/2484945 https://doi.org/10.1111/mec.14207 |
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ftimr:oai:imr.brage.unit.no:11250/2484945 2023-05-15T15:27:03+02:00 Genome architecture enables local adaptation of Atlantic cod despite high connectivity Barth, Julia Maria Isis Berg, Paul Ragnar Jonsson, Per R Bonanomi, Sara Corell, Hanna Hemmer-Hansen, Jakob Jakobsen, Kjetill Sigurd Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Christian Svedang, Henrik Jentoft, Sissel Andre, Carl 2017 application/pdf http://hdl.handle.net/11250/2484945 https://doi.org/10.1111/mec.14207 eng eng Norges forskningsråd: 144182 Norges forskningsråd: 179569 Interreg: 168975 Interreg: 175806 Molecular Ecology. 2017, 26 (17), 4452-4466. urn:issn:0962-1083 http://hdl.handle.net/11250/2484945 https://doi.org/10.1111/mec.14207 cristin:1514164 4452-4466 26 Molecular Ecology 17 Journal article Peer reviewed 2017 ftimr https://doi.org/10.1111/mec.14207 2021-09-23T20:15:46Z 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. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua Institute for Marine Research: Brage IMR Molecular Ecology 26 17 4452 4466 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Barth, Julia Maria Isis Berg, Paul Ragnar Jonsson, Per R Bonanomi, Sara Corell, Hanna Hemmer-Hansen, Jakob Jakobsen, Kjetill Sigurd Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Christian Svedang, Henrik Jentoft, Sissel Andre, Carl |
spellingShingle |
Barth, Julia Maria Isis Berg, Paul Ragnar Jonsson, Per R Bonanomi, Sara Corell, Hanna Hemmer-Hansen, Jakob Jakobsen, Kjetill Sigurd Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Christian Svedang, Henrik Jentoft, Sissel Andre, Carl Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
author_facet |
Barth, Julia Maria Isis Berg, Paul Ragnar Jonsson, Per R Bonanomi, Sara Corell, Hanna Hemmer-Hansen, Jakob Jakobsen, Kjetill Sigurd Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Christian Svedang, Henrik Jentoft, Sissel Andre, Carl |
author_sort |
Barth, Julia Maria Isis |
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 |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2484945 https://doi.org/10.1111/mec.14207 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
4452-4466 26 Molecular Ecology 17 |
op_relation |
Norges forskningsråd: 144182 Norges forskningsråd: 179569 Interreg: 168975 Interreg: 175806 Molecular Ecology. 2017, 26 (17), 4452-4466. urn:issn:0962-1083 http://hdl.handle.net/11250/2484945 https://doi.org/10.1111/mec.14207 cristin:1514164 |
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_ |
1766357512606449664 |