Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.

Polygenic sex determination (PSD) may show variations in terms of genetic and environmental components between populations of fish species exposed/adapted to different environments. The European sea bass (Dicentrarchus labrax) is an interesting model, combining both a PSD system and a genetic subdiv...

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Published in:Heredity
Main Authors: Faggion, Sara, Vandeputte, Marc, Chatain, Béatrice, Gagnaire, Pierre-Alexandre, Allal, François
Format: Text
Language:English
Published: Springer International Publishing 2018
Subjects:
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461929/
http://www.ncbi.nlm.nih.gov/pubmed/30356226
https://doi.org/10.1038/s41437-018-0157-z
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spelling ftpubmed:oai:pubmedcentral.nih.gov:6461929 2023-05-15T17:35:01+02:00 Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L. Faggion, Sara Vandeputte, Marc Chatain, Béatrice Gagnaire, Pierre-Alexandre Allal, François 2018-10-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461929/ http://www.ncbi.nlm.nih.gov/pubmed/30356226 https://doi.org/10.1038/s41437-018-0157-z en eng Springer International Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461929/ http://www.ncbi.nlm.nih.gov/pubmed/30356226 http://dx.doi.org/10.1038/s41437-018-0157-z © The Genetics Society 2018 Article Text 2018 ftpubmed https://doi.org/10.1038/s41437-018-0157-z 2020-05-03T00:16:41Z Polygenic sex determination (PSD) may show variations in terms of genetic and environmental components between populations of fish species exposed/adapted to different environments. The European sea bass (Dicentrarchus labrax) is an interesting model, combining both a PSD system and a genetic subdivision into an Atlantic and a Mediterranean lineage, with genetic substructures within the Mediterranean Sea. Here, we produced experimental progeny crosses (N = 927) from broodstock sampled in four wild populations (North Atlantic, NAT; Western Mediterranean, WEM; North-Eastern Mediterranean, NEM; South-Eastern Mediterranean, SEM). We found less females than males in the progeny, both in the global dataset (32.5%) and within each paternal group (from 25.1% for NEM to 39.0% for WEM), with significant variation among populations, dams, and sires. Sex, body weight (BW), and body length (BL) showed moderate heritability (0.52 ± 0.17, 0.46 ± 0.17, 0.34 ± 0.15, respectively) and sex was genetically correlated with BW and BL, with r(Asex/BW) = 0.69 ± 0.12 and r(A sex/BL) = 0.66 ± 0.13. A weighted GWAS performed both on the global dataset and within each paternal group revealed a different genetic architecture of sex determination between Atlantic and Mediterranean populations (9 QTLs found in NAT, 7 in WEM, 5 in NEM, and 4 in SEM, with a cumulated variance explained of 27.04%, 21.87%, 15.89%, and 12.10%, respectively) and a more similar genetic architecture among geographically close populations compared to geographically distant populations, consistent with the hypothesis of a population-specific evolution of polygenic sex determination systems in different environments. Text North Atlantic PubMed Central (PMC) Heredity 122 5 612 621
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Article
spellingShingle Article
Faggion, Sara
Vandeputte, Marc
Chatain, Béatrice
Gagnaire, Pierre-Alexandre
Allal, François
Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
topic_facet Article
description Polygenic sex determination (PSD) may show variations in terms of genetic and environmental components between populations of fish species exposed/adapted to different environments. The European sea bass (Dicentrarchus labrax) is an interesting model, combining both a PSD system and a genetic subdivision into an Atlantic and a Mediterranean lineage, with genetic substructures within the Mediterranean Sea. Here, we produced experimental progeny crosses (N = 927) from broodstock sampled in four wild populations (North Atlantic, NAT; Western Mediterranean, WEM; North-Eastern Mediterranean, NEM; South-Eastern Mediterranean, SEM). We found less females than males in the progeny, both in the global dataset (32.5%) and within each paternal group (from 25.1% for NEM to 39.0% for WEM), with significant variation among populations, dams, and sires. Sex, body weight (BW), and body length (BL) showed moderate heritability (0.52 ± 0.17, 0.46 ± 0.17, 0.34 ± 0.15, respectively) and sex was genetically correlated with BW and BL, with r(Asex/BW) = 0.69 ± 0.12 and r(A sex/BL) = 0.66 ± 0.13. A weighted GWAS performed both on the global dataset and within each paternal group revealed a different genetic architecture of sex determination between Atlantic and Mediterranean populations (9 QTLs found in NAT, 7 in WEM, 5 in NEM, and 4 in SEM, with a cumulated variance explained of 27.04%, 21.87%, 15.89%, and 12.10%, respectively) and a more similar genetic architecture among geographically close populations compared to geographically distant populations, consistent with the hypothesis of a population-specific evolution of polygenic sex determination systems in different environments.
format Text
author Faggion, Sara
Vandeputte, Marc
Chatain, Béatrice
Gagnaire, Pierre-Alexandre
Allal, François
author_facet Faggion, Sara
Vandeputte, Marc
Chatain, Béatrice
Gagnaire, Pierre-Alexandre
Allal, François
author_sort Faggion, Sara
title Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
title_short Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
title_full Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
title_fullStr Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
title_full_unstemmed Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
title_sort population-specific variations of the genetic architecture of sex determination in wild european sea bass dicentrarchus labrax l.
publisher Springer International Publishing
publishDate 2018
url http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461929/
http://www.ncbi.nlm.nih.gov/pubmed/30356226
https://doi.org/10.1038/s41437-018-0157-z
genre North Atlantic
genre_facet North Atlantic
op_relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461929/
http://www.ncbi.nlm.nih.gov/pubmed/30356226
http://dx.doi.org/10.1038/s41437-018-0157-z
op_rights © The Genetics Society 2018
op_doi https://doi.org/10.1038/s41437-018-0157-z
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