Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations
Two distinct populations have been extensively studied in Atlantic cod (Gadus morhua L.): the Northeast Arctic cod (NEAC) population and the coastal cod (CC) population. The objectives of the current study were to identify genomic islands of divergence and to propose an approach to quantify the stre...
Published in: | Genetics Selection Evolution |
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Language: | English |
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ftinraparis:oai:prodinra.inra.fr:491863 2023-05-15T14:30:30+02:00 Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations Rodriguez Ramilo, Silvia Téresa Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjorn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. 2019 application/pdf http://prodinra.inra.fr/ft/1A624C34-D1FB-4C6C-A515-60AA8A5CB892 http://prodinra.inra.fr/record/491863 https://doi.org/10.1186/s12711-019-0503-5 eng eng https://creativecommons.org/licenses/by/3.0/ CC-BY Genetics Selection Evolution 1 (51), Non paginé. (2019) Autre (Sciences du Vivant) viral nervous necrosis;stationary ecotype;read alignment;gene flow;differentiation;resistance;vibriosis;costal ARTICLE 2019 ftinraparis https://doi.org/10.1186/s12711-019-0503-5 2020-01-14T23:26:25Z Two distinct populations have been extensively studied in Atlantic cod (Gadus morhua L.): the Northeast Arctic cod (NEAC) population and the coastal cod (CC) population. The objectives of the current study were to identify genomic islands of divergence and to propose an approach to quantify the strength of selection pressures using whole-genome single nucleotide polymorphism (SNP) data. After applying filtering criteria, information on 93 animals (9 CC individuals, 50 NEAC animals and 34 CC x NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. Four genomic islands of divergence were identified on chromosomes 1, 2, 7 and 12, which were mapped accurately based on SNP data and which extended in size from 11 to 18 Mb. These regions differed considerably between the two populations although the differences in the rest of the genome were small due to considerable gene flow between the populations. The estimates of selection pressures showed that natural selection was substantially more important than genetic drift in shaping these genomic islands. Our data confirmed results from earlier publications that suggested that genomic islands are due to chromosomal rearrangements that are under strong selection and reduce recombination between rearranged and non-rearranged segments. Our findings further support the hypothesis that selection and reduced recombination in genomic islands may promote speciation between these two populations although their habitats overlap considerably and migrations occur between them. Article in Journal/Newspaper Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod Institut National de la Recherche Agronomique: ProdINRA Arctic Genetics Selection Evolution 51 1 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
Autre (Sciences du Vivant) viral nervous necrosis;stationary ecotype;read alignment;gene flow;differentiation;resistance;vibriosis;costal |
spellingShingle |
Autre (Sciences du Vivant) viral nervous necrosis;stationary ecotype;read alignment;gene flow;differentiation;resistance;vibriosis;costal Rodriguez Ramilo, Silvia Téresa Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjorn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
topic_facet |
Autre (Sciences du Vivant) viral nervous necrosis;stationary ecotype;read alignment;gene flow;differentiation;resistance;vibriosis;costal |
description |
Two distinct populations have been extensively studied in Atlantic cod (Gadus morhua L.): the Northeast Arctic cod (NEAC) population and the coastal cod (CC) population. The objectives of the current study were to identify genomic islands of divergence and to propose an approach to quantify the strength of selection pressures using whole-genome single nucleotide polymorphism (SNP) data. After applying filtering criteria, information on 93 animals (9 CC individuals, 50 NEAC animals and 34 CC x NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. Four genomic islands of divergence were identified on chromosomes 1, 2, 7 and 12, which were mapped accurately based on SNP data and which extended in size from 11 to 18 Mb. These regions differed considerably between the two populations although the differences in the rest of the genome were small due to considerable gene flow between the populations. The estimates of selection pressures showed that natural selection was substantially more important than genetic drift in shaping these genomic islands. Our data confirmed results from earlier publications that suggested that genomic islands are due to chromosomal rearrangements that are under strong selection and reduce recombination between rearranged and non-rearranged segments. Our findings further support the hypothesis that selection and reduced recombination in genomic islands may promote speciation between these two populations although their habitats overlap considerably and migrations occur between them. |
format |
Article in Journal/Newspaper |
author |
Rodriguez Ramilo, Silvia Téresa Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjorn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. |
author_facet |
Rodriguez Ramilo, Silvia Téresa Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjorn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. |
author_sort |
Rodriguez Ramilo, Silvia Téresa |
title |
Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
title_short |
Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
title_full |
Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
title_fullStr |
Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
title_full_unstemmed |
Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations |
title_sort |
strong selection pressures maintain divergence on genomic islands in atlantic cod (gadus morhua l.) populations |
publishDate |
2019 |
url |
http://prodinra.inra.fr/ft/1A624C34-D1FB-4C6C-A515-60AA8A5CB892 http://prodinra.inra.fr/record/491863 https://doi.org/10.1186/s12711-019-0503-5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod |
genre_facet |
Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod |
op_source |
Genetics Selection Evolution 1 (51), Non paginé. (2019) |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s12711-019-0503-5 |
container_title |
Genetics Selection Evolution |
container_volume |
51 |
container_issue |
1 |
_version_ |
1766304333361577984 |