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...
Published in: | Molecular Ecology |
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Main Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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ftdtupubl:oai:pure.atira.dk:publications/ad27f560-9536-4993-9bc6-8f63ba3121a5 2024-09-15T17:55:24+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 Hansen, Jakob Hemmer Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel Andre, Carl 2017 application/pdf https://orbit.dtu.dk/en/publications/ad27f560-9536-4993-9bc6-8f63ba3121a5 https://doi.org/10.1111/mec.14207 https://backend.orbit.dtu.dk/ws/files/140547430/Publishers_version.pdf eng eng https://orbit.dtu.dk/en/publications/ad27f560-9536-4993-9bc6-8f63ba3121a5 info:eu-repo/semantics/openAccess Barth , J M I , Berg , P R , Jonsson , P R , Bonanomi , S , Corell , H , Hansen , J H , Jakobsen , K S , Johannesson , K , Jorde , P E , Knutsen , H , Moksnes , P-O , Star , B , Stenseth , N C , Svedäng , H , Jentoft , S & Andre , C 2017 , ' Genome architecture enables local adaptation of Atlantic cod despite high connectivity ' , Molecular Ecology , vol. 26 , no. 17 , pp. 4452-4466 . https://doi.org/10.1111/mec.14207 Gadus morhua chromosomal inversion ecological adaptation gene flow population divergence /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2017 ftdtupubl https://doi.org/10.1111/mec.14207 2024-08-13T00:03:05Z 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. This article is protected by copyright. All rights reserved. Article in Journal/Newspaper atlantic cod Gadus morhua Technical University of Denmark: DTU Orbit Molecular Ecology 26 17 4452 4466 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Gadus morhua chromosomal inversion ecological adaptation gene flow population divergence /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Gadus morhua chromosomal inversion ecological adaptation gene flow population divergence /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Barth, Julia M I Berg, Paul R Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hansen, Jakob Hemmer Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel Andre, Carl Genome architecture enables local adaptation of Atlantic cod despite high connectivity |
topic_facet |
Gadus morhua chromosomal inversion ecological adaptation gene flow population divergence /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
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. This article is protected by copyright. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Barth, Julia M I Berg, Paul R Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hansen, Jakob Hemmer Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel Andre, Carl |
author_facet |
Barth, Julia M I Berg, Paul R Jonsson, Per R. Bonanomi, Sara Corell, Hanna Hansen, Jakob Hemmer Jakobsen, Kjetill S. Johannesson, Kerstin Jorde, Per Erik Knutsen, Halvor Moksnes, Per-Olav Star, Bastiaan Stenseth, Nils Chr. Svedäng, Henrik Jentoft, Sissel Andre, 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 |
publishDate |
2017 |
url |
https://orbit.dtu.dk/en/publications/ad27f560-9536-4993-9bc6-8f63ba3121a5 https://doi.org/10.1111/mec.14207 https://backend.orbit.dtu.dk/ws/files/140547430/Publishers_version.pdf |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Barth , J M I , Berg , P R , Jonsson , P R , Bonanomi , S , Corell , H , Hansen , J H , Jakobsen , K S , Johannesson , K , Jorde , P E , Knutsen , H , Moksnes , P-O , Star , B , Stenseth , N C , Svedäng , H , Jentoft , S & Andre , C 2017 , ' Genome architecture enables local adaptation of Atlantic cod despite high connectivity ' , Molecular Ecology , vol. 26 , no. 17 , pp. 4452-4466 . https://doi.org/10.1111/mec.14207 |
op_relation |
https://orbit.dtu.dk/en/publications/ad27f560-9536-4993-9bc6-8f63ba3121a5 |
op_rights |
info:eu-repo/semantics/openAccess |
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_ |
1810431688815149056 |