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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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 |
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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. |
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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 |
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North Atlantic |
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North Atlantic |
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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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