Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s)
Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence and associated genomic incompatibilities between the different entities as we...
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Online Access: | https://hdl.handle.net/11250/3109775 https://doi.org/10.1111/eva.13575 |
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ftimr:oai:imr.brage.unit.no:11250/3109775 2024-02-04T10:00:30+01:00 Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) Helmerson, Cecilia Weist, Peggy Brieuc, Marine Servane Ono Maurstad, Marius Filomeno Schade, Franziska Maria Dierking, Jan Petereit, Christoph Knutsen, Halvor Metcalfe, Julian Righton, David André, Carl Krumme, Uwe Jentoft, Sissel Hanel, Reinhold 2023 application/pdf https://hdl.handle.net/11250/3109775 https://doi.org/10.1111/eva.13575 eng eng Norges forskningsråd: 221734 EC/H2020/675997 Evolutionary Applications. 2023, 16 (7), 1359-1376. urn:issn:1752-4571 https://hdl.handle.net/11250/3109775 https://doi.org/10.1111/eva.13575 cristin:2163415 1359-1376 16 Evolutionary Applications 7 Peer reviewed Journal article 2023 ftimr https://doi.org/10.1111/eva.13575 2024-01-10T23:47:43Z Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence and associated genomic incompatibilities between the different entities as well as environmental conditions. By taking advantage of historical Baltic cod (Gadus morhua) otolith samples combined with genotyping and whole genome sequencing, we here investigate the genetic impact of the increased spawning stock biomass of the eastern Baltic cod stock in the mid 1980s. The eastern Baltic cod is genetically highly differentiated from the adjacent western Baltic cod and locally adapted to the brackish environmental conditions in the deeper Eastern basins of the Baltic Sea unsuitable for its marine counterparts. Our genotyping results show an increased proportion of eastern Baltic cod in western Baltic areas (Mecklenburg Bay and Arkona Basin)—indicative of a range expansion westwards—during the peak population abundance in the 1980s. Additionally, we detect high frequencies of potential hybrids (including F1, F2 and backcrosses), verified by whole genome sequencing data for a subset of individuals. Analysis of mitochondrial genomes further indicates directional gene flow from eastern Baltic cod males to western Baltic cod females. Our findings unravel that increased overlap in distribution can promote hybridization between highly divergent populations and that the hybrids can be viable and survive under specific and favourable environmental conditions. However, the observed hybridization had seemingly no long-lasting impact on the continuous separation and genetic differentiation between the unique Baltic cod stocks. publishedVersion publishedVersion Article in Journal/Newspaper Gadus morhua Institute for Marine Research: Brage IMR Evolutionary Applications 16 7 1359 1376 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence and associated genomic incompatibilities between the different entities as well as environmental conditions. By taking advantage of historical Baltic cod (Gadus morhua) otolith samples combined with genotyping and whole genome sequencing, we here investigate the genetic impact of the increased spawning stock biomass of the eastern Baltic cod stock in the mid 1980s. The eastern Baltic cod is genetically highly differentiated from the adjacent western Baltic cod and locally adapted to the brackish environmental conditions in the deeper Eastern basins of the Baltic Sea unsuitable for its marine counterparts. Our genotyping results show an increased proportion of eastern Baltic cod in western Baltic areas (Mecklenburg Bay and Arkona Basin)—indicative of a range expansion westwards—during the peak population abundance in the 1980s. Additionally, we detect high frequencies of potential hybrids (including F1, F2 and backcrosses), verified by whole genome sequencing data for a subset of individuals. Analysis of mitochondrial genomes further indicates directional gene flow from eastern Baltic cod males to western Baltic cod females. Our findings unravel that increased overlap in distribution can promote hybridization between highly divergent populations and that the hybrids can be viable and survive under specific and favourable environmental conditions. However, the observed hybridization had seemingly no long-lasting impact on the continuous separation and genetic differentiation between the unique Baltic cod stocks. publishedVersion publishedVersion |
format |
Article in Journal/Newspaper |
author |
Helmerson, Cecilia Weist, Peggy Brieuc, Marine Servane Ono Maurstad, Marius Filomeno Schade, Franziska Maria Dierking, Jan Petereit, Christoph Knutsen, Halvor Metcalfe, Julian Righton, David André, Carl Krumme, Uwe Jentoft, Sissel Hanel, Reinhold |
spellingShingle |
Helmerson, Cecilia Weist, Peggy Brieuc, Marine Servane Ono Maurstad, Marius Filomeno Schade, Franziska Maria Dierking, Jan Petereit, Christoph Knutsen, Halvor Metcalfe, Julian Righton, David André, Carl Krumme, Uwe Jentoft, Sissel Hanel, Reinhold Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
author_facet |
Helmerson, Cecilia Weist, Peggy Brieuc, Marine Servane Ono Maurstad, Marius Filomeno Schade, Franziska Maria Dierking, Jan Petereit, Christoph Knutsen, Halvor Metcalfe, Julian Righton, David André, Carl Krumme, Uwe Jentoft, Sissel Hanel, Reinhold |
author_sort |
Helmerson, Cecilia |
title |
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
title_short |
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
title_full |
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
title_fullStr |
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
title_full_unstemmed |
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) |
title_sort |
evidence of hybridization between genetically distinct baltic cod stocks during peak population abundance(s) |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3109775 https://doi.org/10.1111/eva.13575 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
1359-1376 16 Evolutionary Applications 7 |
op_relation |
Norges forskningsråd: 221734 EC/H2020/675997 Evolutionary Applications. 2023, 16 (7), 1359-1376. urn:issn:1752-4571 https://hdl.handle.net/11250/3109775 https://doi.org/10.1111/eva.13575 cristin:2163415 |
op_doi |
https://doi.org/10.1111/eva.13575 |
container_title |
Evolutionary Applications |
container_volume |
16 |
container_issue |
7 |
container_start_page |
1359 |
op_container_end_page |
1376 |
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1789965838215806976 |