Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations
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 quant...
Published in: | Genetics Selection Evolution |
---|---|
Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
Published: |
BioMed Central
2019
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6819574/ http://www.ncbi.nlm.nih.gov/pubmed/31664896 https://doi.org/10.1186/s12711-019-0503-5 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:6819574 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:6819574 2023-05-15T14:30:29+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. 2019-10-29 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6819574/ http://www.ncbi.nlm.nih.gov/pubmed/31664896 https://doi.org/10.1186/s12711-019-0503-5 en eng BioMed Central http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6819574/ http://www.ncbi.nlm.nih.gov/pubmed/31664896 http://dx.doi.org/10.1186/s12711-019-0503-5 © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. CC0 PDM CC-BY Research Article Text 2019 ftpubmed https://doi.org/10.1186/s12711-019-0503-5 2019-11-03T02:06:28Z 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. Text Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod PubMed Central (PMC) Arctic Genetics Selection Evolution 51 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research Article |
spellingShingle |
Research Article 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 |
Research Article |
description |
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 |
Text |
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 |
BioMed Central |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6819574/ http://www.ncbi.nlm.nih.gov/pubmed/31664896 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_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6819574/ http://www.ncbi.nlm.nih.gov/pubmed/31664896 http://dx.doi.org/10.1186/s12711-019-0503-5 |
op_rights |
© The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
op_rightsnorm |
CC0 PDM 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_ |
1766304327315488768 |