Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?
Abstract The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or any known hybrid zone. The finely carved coast leads to a highly heterogeneous habitat. We investigated the impact of the environment...
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crwiley:10.1002/ece3.1421 2024-06-02T08:14:50+00:00 Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? Gérard, Karin Roby, Charlotte Bierne, Nicolas Borsa, Philippe Féral, Jean‐Pierre Chenuil, Anne Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique 2015 http://dx.doi.org/10.1002/ece3.1421 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.1421 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.1421 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 5, issue 7, page 1456-1473 ISSN 2045-7758 2045-7758 journal-article 2015 crwiley https://doi.org/10.1002/ece3.1421 2024-05-03T11:19:27Z Abstract The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or any known hybrid zone. The finely carved coast leads to a highly heterogeneous habitat. We investigated the impact of the environment on the genetic structure in those Kerguelen blue mussels by relating allele frequencies to habitat descriptors. A total sample comprising up to 2248 individuals from 35 locations was characterized using two nuclear markers, mac‐1 and Glu‐5′ , and a mitochondrial marker ( COI ). The frequency data from 9 allozyme loci in 9 of these locations were also reanalyzed. Two other nuclear markers ( EF bis and EF prem's ) were monomorphic. Compared to Northern Hemisphere populations, polymorphism in Kerguelen blue mussels was lower for all markers except for the exon Glu‐5′ . At Glu‐5′ , genetic differences were observed between samples from distinct regions ( F CT = 0.077), as well as within two regions, including between samples separated by <500 m. No significant differentiation was observed in the AMOVA analyses at the two other markers ( mac‐1 and COI ). Like mac‐1 , all allozyme loci genotyped in a previous publication, displayed lower differentiation (Jost's D) and F ST values than Glu‐5′ . Power simulations and confidence intervals support that Glu ‐5′ displays significantly higher differentiation than the other loci (except a single allozyme for which confidence intervals overlap). AMOVA analyses revealed significant effects of the giant kelp Macrocystis and wave exposure on this marker. We discuss the influence of hydrological conditions on the genetic differentiation among regions. In marine organisms with high fecundity and high dispersal potential, gene flow tends to erase differentiation, but this study showed significant differentiation at very small distance. This may be explained by the particular hydrology and the carved coastline of the Kerguelen archipelago, together with spatially variable selection at ... Article in Journal/Newspaper Southern Ocean Wiley Online Library Kerguelen Southern Ocean Ecology and Evolution 5 7 1456 1473 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or any known hybrid zone. The finely carved coast leads to a highly heterogeneous habitat. We investigated the impact of the environment on the genetic structure in those Kerguelen blue mussels by relating allele frequencies to habitat descriptors. A total sample comprising up to 2248 individuals from 35 locations was characterized using two nuclear markers, mac‐1 and Glu‐5′ , and a mitochondrial marker ( COI ). The frequency data from 9 allozyme loci in 9 of these locations were also reanalyzed. Two other nuclear markers ( EF bis and EF prem's ) were monomorphic. Compared to Northern Hemisphere populations, polymorphism in Kerguelen blue mussels was lower for all markers except for the exon Glu‐5′ . At Glu‐5′ , genetic differences were observed between samples from distinct regions ( F CT = 0.077), as well as within two regions, including between samples separated by <500 m. No significant differentiation was observed in the AMOVA analyses at the two other markers ( mac‐1 and COI ). Like mac‐1 , all allozyme loci genotyped in a previous publication, displayed lower differentiation (Jost's D) and F ST values than Glu‐5′ . Power simulations and confidence intervals support that Glu ‐5′ displays significantly higher differentiation than the other loci (except a single allozyme for which confidence intervals overlap). AMOVA analyses revealed significant effects of the giant kelp Macrocystis and wave exposure on this marker. We discuss the influence of hydrological conditions on the genetic differentiation among regions. In marine organisms with high fecundity and high dispersal potential, gene flow tends to erase differentiation, but this study showed significant differentiation at very small distance. This may be explained by the particular hydrology and the carved coastline of the Kerguelen archipelago, together with spatially variable selection at ... |
author2 |
Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique |
format |
Article in Journal/Newspaper |
author |
Gérard, Karin Roby, Charlotte Bierne, Nicolas Borsa, Philippe Féral, Jean‐Pierre Chenuil, Anne |
spellingShingle |
Gérard, Karin Roby, Charlotte Bierne, Nicolas Borsa, Philippe Féral, Jean‐Pierre Chenuil, Anne Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
author_facet |
Gérard, Karin Roby, Charlotte Bierne, Nicolas Borsa, Philippe Féral, Jean‐Pierre Chenuil, Anne |
author_sort |
Gérard, Karin |
title |
Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
title_short |
Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
title_full |
Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
title_fullStr |
Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
title_full_unstemmed |
Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen? |
title_sort |
does natural selection explain the fine scale genetic structure at the nuclear exon glu‐5′ in blue mussels from kerguelen? |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/ece3.1421 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.1421 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.1421 |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Ecology and Evolution volume 5, issue 7, page 1456-1473 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.1421 |
container_title |
Ecology and Evolution |
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5 |
container_issue |
7 |
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1456 |
op_container_end_page |
1473 |
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1800738812662382592 |