Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon
Abstract Little is known about the genetic basis differentiating resident and anadromous forms found in many salmonid species. Using a medium‐density SNP array, we documented genomic diversity and divergence at 2336 genetically mapped loci among three pairs of North American anadromous and freshwate...
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crwiley:10.1111/mec.12500 2024-04-28T08:13:30+00:00 Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon Perrier, Charles Bourret, Vincent Kent, Matthew P. Bernatchez, Louis 2013 http://dx.doi.org/10.1111/mec.12500 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12500 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12500 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 22, issue 22, page 5577-5593 ISSN 0962-1083 1365-294X Genetics Ecology, Evolution, Behavior and Systematics journal-article 2013 crwiley https://doi.org/10.1111/mec.12500 2024-04-05T07:39:14Z Abstract Little is known about the genetic basis differentiating resident and anadromous forms found in many salmonid species. Using a medium‐density SNP array, we documented genomic diversity and divergence at 2336 genetically mapped loci among three pairs of North American anadromous and freshwater Atlantic salmon populations. Our results show that across the genome, freshwater populations have lower diversity and a smaller proportion of private polymorphism relative to anadromous populations. Moreover, differentiation was more pronounced among freshwater than among anadromous populations at multiple spatial scales, suggesting a large effect of genetic drift in these isolated freshwater populations. Using nonhierarchical and hierarchical genome scans, we identified hundreds of markers spread across the genome that are potentially under divergent selection between anadromous and freshwater populations, but few outlier loci were repeatedly found in all three freshwater–anadromous comparisons. Similarly, a sliding window analysis revealed numerous regions of high divergence that were nonparallel among the three comparisons. These last results show little evidence for the parallel evolution of alleles selected for in freshwater populations, but suggest nonparallel adaptive divergence at many loci of small effects distributed through the genome. Overall, this study emphasizes the important role of genetic drift in driving genome‐wide reduction in diversity and divergence in freshwater Atlantic salmon populations and suggests a complex multigenic basis of adaptation to resident and anadromous strategies with little parallelism. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Molecular Ecology 22 22 5577 5593 |
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English |
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Genetics Ecology, Evolution, Behavior and Systematics |
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Genetics Ecology, Evolution, Behavior and Systematics Perrier, Charles Bourret, Vincent Kent, Matthew P. Bernatchez, Louis Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
topic_facet |
Genetics Ecology, Evolution, Behavior and Systematics |
description |
Abstract Little is known about the genetic basis differentiating resident and anadromous forms found in many salmonid species. Using a medium‐density SNP array, we documented genomic diversity and divergence at 2336 genetically mapped loci among three pairs of North American anadromous and freshwater Atlantic salmon populations. Our results show that across the genome, freshwater populations have lower diversity and a smaller proportion of private polymorphism relative to anadromous populations. Moreover, differentiation was more pronounced among freshwater than among anadromous populations at multiple spatial scales, suggesting a large effect of genetic drift in these isolated freshwater populations. Using nonhierarchical and hierarchical genome scans, we identified hundreds of markers spread across the genome that are potentially under divergent selection between anadromous and freshwater populations, but few outlier loci were repeatedly found in all three freshwater–anadromous comparisons. Similarly, a sliding window analysis revealed numerous regions of high divergence that were nonparallel among the three comparisons. These last results show little evidence for the parallel evolution of alleles selected for in freshwater populations, but suggest nonparallel adaptive divergence at many loci of small effects distributed through the genome. Overall, this study emphasizes the important role of genetic drift in driving genome‐wide reduction in diversity and divergence in freshwater Atlantic salmon populations and suggests a complex multigenic basis of adaptation to resident and anadromous strategies with little parallelism. |
format |
Article in Journal/Newspaper |
author |
Perrier, Charles Bourret, Vincent Kent, Matthew P. Bernatchez, Louis |
author_facet |
Perrier, Charles Bourret, Vincent Kent, Matthew P. Bernatchez, Louis |
author_sort |
Perrier, Charles |
title |
Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
title_short |
Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
title_full |
Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
title_fullStr |
Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
title_full_unstemmed |
Parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>A</scp>tlantic salmon |
title_sort |
parallel and nonparallel genome‐wide divergence among replicate population pairs of freshwater and anadromous <scp>a</scp>tlantic salmon |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/mec.12500 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12500 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12500 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Molecular Ecology volume 22, issue 22, page 5577-5593 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/mec.12500 |
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Molecular Ecology |
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22 |
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22 |
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5577 |
op_container_end_page |
5593 |
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1797579988546879488 |