Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations
Abstract Background 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...
Published in: | Genetics Selection Evolution |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1186/s12711-019-0503-5 http://link.springer.com/content/pdf/10.1186/s12711-019-0503-5.pdf http://link.springer.com/article/10.1186/s12711-019-0503-5/fulltext.html |
id |
crspringernat:10.1186/s12711-019-0503-5 |
---|---|
record_format |
openpolar |
spelling |
crspringernat:10.1186/s12711-019-0503-5 2023-05-15T14:30:30+02:00 Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations Rodríguez-Ramilo, Silvia T. Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjørn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. 2019 http://dx.doi.org/10.1186/s12711-019-0503-5 http://link.springer.com/content/pdf/10.1186/s12711-019-0503-5.pdf http://link.springer.com/article/10.1186/s12711-019-0503-5/fulltext.html en eng Springer Science and Business Media LLC http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ CC-BY Genetics Selection Evolution volume 51, issue 1 ISSN 1297-9686 Genetics Animal Science and Zoology General Medicine Ecology, Evolution, Behavior and Systematics journal-article 2019 crspringernat https://doi.org/10.1186/s12711-019-0503-5 2022-01-04T07:56:01Z Abstract Background 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 × NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. Results 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. Conclusions 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 Springer Nature (via Crossref) Arctic Genetics Selection Evolution 51 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Genetics Animal Science and Zoology General Medicine Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Genetics Animal Science and Zoology General Medicine Ecology, Evolution, Behavior and Systematics Rodríguez-Ramilo, Silvia T. Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjørn 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 |
Genetics Animal Science and Zoology General Medicine Ecology, Evolution, Behavior and Systematics |
description |
Abstract Background 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 × NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. Results 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. Conclusions 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 |
Rodríguez-Ramilo, Silvia T. Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjørn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. |
author_facet |
Rodríguez-Ramilo, Silvia T. Baranski, Matthew Moghadam, Hooman Grove, Harald Lien, Sigbjørn Goddard, Mike E. Meuwissen, Theo H. E. Sonesson, Anna K. |
author_sort |
Rodríguez-Ramilo, Silvia T. |
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 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
http://dx.doi.org/10.1186/s12711-019-0503-5 http://link.springer.com/content/pdf/10.1186/s12711-019-0503-5.pdf http://link.springer.com/article/10.1186/s12711-019-0503-5/fulltext.html |
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 volume 51, issue 1 ISSN 1297-9686 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
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_ |
1766304336561831936 |