Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic
ABSTRACT Greenland halibut (Reinhardtius hippoglossoides) is a commercially important species in the North Atlantic whose spatial population structure has not yet been fully determined across its entire range. We genotyped individuals from across the North Atlantic using a subset of informative sing...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Ecology and Evolution |
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| Online Access: | https://doi.org/10.1002/ece3.70822 |
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| author | Daniel Estévez‐Barcia Denis Roy Mikko Vihtakari Davíð Gíslason Martin Lindegren Asbjørn Christensen Laura Wheeland Margaret Treble Julio Úbeda Adriana Nogueira Kevin Hedges Áki Jarl Láruson Alejandro Mateos Rivera Geir Dahle Jon‐Ivar Westgaard Bjarki Elvarsson Lise Helen Ofstad Elvar H. Hallfredsson Ole Thomas Albert Jesper Boje Torild Johansen |
| author_facet | Daniel Estévez‐Barcia Denis Roy Mikko Vihtakari Davíð Gíslason Martin Lindegren Asbjørn Christensen Laura Wheeland Margaret Treble Julio Úbeda Adriana Nogueira Kevin Hedges Áki Jarl Láruson Alejandro Mateos Rivera Geir Dahle Jon‐Ivar Westgaard Bjarki Elvarsson Lise Helen Ofstad Elvar H. Hallfredsson Ole Thomas Albert Jesper Boje Torild Johansen |
| author_sort | Daniel Estévez‐Barcia |
| collection | DOAJ |
| description | ABSTRACT Greenland halibut (Reinhardtius hippoglossoides) is a commercially important species in the North Atlantic whose spatial population structure has not yet been fully determined across its entire range. We genotyped individuals from across the North Atlantic using a subset of informative single nucleotide polymorphic (SNP) markers to assess their usability as a SNP panel. We assessed whether these purportedly structured SNPs had any association with sex. We found several of these loci to be in sex‐determining chromosomes and that their inclusion generated genetic structure mainly in males. The population structure without the sex‐associated SNPs was weak and followed an isolation‐by‐distance pattern, likely with a large regional population on each side of the North Atlantic. We discuss how different sex ratios in the samples and/or an evolving sex‐determination system in this species likely caused the inclusion of sex‐associated loci in the panel. We found suggestive evidence of polymorphisms at sex‐determining chromosomes differentiating males on east and west locations, indicating evolution of the sex‐determination system. These results highlight the importance of documenting sex‐based differences in genetic studies and call for a better understanding of genomic architecture to understand sex‐determination systems across the whole distribution of sexually dimorphic species. |
| format | Article |
| id | doaj-art-e7b15fb4c7744aca8d02826d1bb69b2b |
| institution | DOAJ |
| issn | 2045-7758 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj-art-e7b15fb4c7744aca8d02826d1bb69b2b2025-08-20T02:46:57ZengWileyEcology and Evolution2045-77582025-02-01152n/an/a10.1002/ece3.70822Sex Influences the Genetic Structure of Greenland Halibut in the North AtlanticDaniel Estévez‐Barcia0Denis Roy1Mikko Vihtakari2Davíð Gíslason3Martin Lindegren4Asbjørn Christensen5Laura Wheeland6Margaret Treble7Julio Úbeda8Adriana Nogueira9Kevin Hedges10Áki Jarl Láruson11Alejandro Mateos Rivera12Geir Dahle13Jon‐Ivar Westgaard14Bjarki Elvarsson15Lise Helen Ofstad16Elvar H. Hallfredsson17Ole Thomas Albert18Jesper Boje19Torild Johansen20Greenland Institute of Natural Resources Nuuk GreenlandDepartment of Natural Resource Sciences McGill University Montreal Quebec CanadaInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayMatis Ltd. Reykjavík IcelandDTU Aqua, Department of Aquatic Resources Henrik Dams Allé Lyngby DenmarkDTU Aqua, Department of Aquatic Resources Henrik Dams Allé Lyngby DenmarkFisheries and Oceans Canada Northwest Atlantic Fisheries Centre St. John's Northwest Atlantic CanadaFisheries and Oceans Canada, Freshwater Institute Winnipeg Manitoba CanadaGreenland Institute of Natural Resources Nuuk GreenlandGreenland Institute of Natural Resources Nuuk GreenlandFisheries and Oceans Canada, Freshwater Institute Winnipeg Manitoba CanadaMarine and Freshwater Research Institute Hafnarfjörður IcelandInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayMarine and Freshwater Research Institute Hafnarfjörður IcelandFaroe Marine Research Institute Tórshavn Faroe IslandsInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayGreenland Institute of Natural Resources Nuuk GreenlandInstitute of Marine Research Tromsø Department, Fram Centre Tromsø NorwayABSTRACT Greenland halibut (Reinhardtius hippoglossoides) is a commercially important species in the North Atlantic whose spatial population structure has not yet been fully determined across its entire range. We genotyped individuals from across the North Atlantic using a subset of informative single nucleotide polymorphic (SNP) markers to assess their usability as a SNP panel. We assessed whether these purportedly structured SNPs had any association with sex. We found several of these loci to be in sex‐determining chromosomes and that their inclusion generated genetic structure mainly in males. The population structure without the sex‐associated SNPs was weak and followed an isolation‐by‐distance pattern, likely with a large regional population on each side of the North Atlantic. We discuss how different sex ratios in the samples and/or an evolving sex‐determination system in this species likely caused the inclusion of sex‐associated loci in the panel. We found suggestive evidence of polymorphisms at sex‐determining chromosomes differentiating males on east and west locations, indicating evolution of the sex‐determination system. These results highlight the importance of documenting sex‐based differences in genetic studies and call for a better understanding of genomic architecture to understand sex‐determination systems across the whole distribution of sexually dimorphic species.https://doi.org/10.1002/ece3.70822adaptationgenetic sex determinationpopulation geneticsReinhardtius hippoglossoidessex‐biasses |
| spellingShingle | Daniel Estévez‐Barcia Denis Roy Mikko Vihtakari Davíð Gíslason Martin Lindegren Asbjørn Christensen Laura Wheeland Margaret Treble Julio Úbeda Adriana Nogueira Kevin Hedges Áki Jarl Láruson Alejandro Mateos Rivera Geir Dahle Jon‐Ivar Westgaard Bjarki Elvarsson Lise Helen Ofstad Elvar H. Hallfredsson Ole Thomas Albert Jesper Boje Torild Johansen Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic Ecology and Evolution adaptation genetic sex determination population genetics Reinhardtius hippoglossoides sex‐biasses |
| title | Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic |
| title_full | Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic |
| title_fullStr | Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic |
| title_full_unstemmed | Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic |
| title_short | Sex Influences the Genetic Structure of Greenland Halibut in the North Atlantic |
| title_sort | sex influences the genetic structure of greenland halibut in the north atlantic |
| topic | adaptation genetic sex determination population genetics Reinhardtius hippoglossoides sex‐biasses |
| url | https://doi.org/10.1002/ece3.70822 |
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