Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon
Knowledge of the relative importance of genetic versus environmental determinants of major developmental transitions is pertinent to understanding phenotypic evolution. In salmonid fishes, a major developmental transition enables a risky seaward migration that provides access to feed resources. In A...
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crroyalsociety:10.1098/rspb.2020.0867 2024-09-15T17:55:57+00:00 Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon Debes, Paul V. Piavchenko, Nikolai Erkinaro, Jaakko Primmer, Craig R. H2020 European Research Council Academy of Finland 2020 http://dx.doi.org/10.1098/rspb.2020.0867 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2020.0867 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2020.0867 en eng The Royal Society https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdf https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 287, issue 1931, page 20200867 ISSN 0962-8452 1471-2954 journal-article 2020 crroyalsociety https://doi.org/10.1098/rspb.2020.0867 2024-09-02T04:21:06Z Knowledge of the relative importance of genetic versus environmental determinants of major developmental transitions is pertinent to understanding phenotypic evolution. In salmonid fishes, a major developmental transition enables a risky seaward migration that provides access to feed resources. In Atlantic salmon, initiation of the migrant phenotype, and thus age of migrants, is presumably controlled via thresholds of a quantitative liability, approximated by body size expressed long before the migration. However, how well size approximates liability, both genetically and environmentally, remains uncertain. We studied 32 Atlantic salmon families in two temperatures and feeding regimes (fully fed, temporarily restricted) to completion of migration status at age 1 year. We detected a lower migrant probability in the cold (0.42) than the warm environment (0.76), but no effects of male maturation status or feed restriction. By contrast, body length in late summer predicted migrant probability and its control reduced migrant probability heritability by 50–70%. Furthermore, migrant probability and length showed high heritabilities and between-environment genetic correlations, and were phenotypically highly correlated with stronger genetic than environmental contributions. Altogether, quantitative estimates for the genetic and environmental effects predicting the migrant phenotype indicate, for a given temperature, a larger importance of genetic than environmental size effects. Article in Journal/Newspaper Atlantic salmon The Royal Society Proceedings of the Royal Society B: Biological Sciences 287 1931 20200867 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Knowledge of the relative importance of genetic versus environmental determinants of major developmental transitions is pertinent to understanding phenotypic evolution. In salmonid fishes, a major developmental transition enables a risky seaward migration that provides access to feed resources. In Atlantic salmon, initiation of the migrant phenotype, and thus age of migrants, is presumably controlled via thresholds of a quantitative liability, approximated by body size expressed long before the migration. However, how well size approximates liability, both genetically and environmentally, remains uncertain. We studied 32 Atlantic salmon families in two temperatures and feeding regimes (fully fed, temporarily restricted) to completion of migration status at age 1 year. We detected a lower migrant probability in the cold (0.42) than the warm environment (0.76), but no effects of male maturation status or feed restriction. By contrast, body length in late summer predicted migrant probability and its control reduced migrant probability heritability by 50–70%. Furthermore, migrant probability and length showed high heritabilities and between-environment genetic correlations, and were phenotypically highly correlated with stronger genetic than environmental contributions. Altogether, quantitative estimates for the genetic and environmental effects predicting the migrant phenotype indicate, for a given temperature, a larger importance of genetic than environmental size effects. |
author2 |
H2020 European Research Council Academy of Finland |
format |
Article in Journal/Newspaper |
author |
Debes, Paul V. Piavchenko, Nikolai Erkinaro, Jaakko Primmer, Craig R. |
spellingShingle |
Debes, Paul V. Piavchenko, Nikolai Erkinaro, Jaakko Primmer, Craig R. Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
author_facet |
Debes, Paul V. Piavchenko, Nikolai Erkinaro, Jaakko Primmer, Craig R. |
author_sort |
Debes, Paul V. |
title |
Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
title_short |
Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
title_full |
Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
title_fullStr |
Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
title_full_unstemmed |
Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon |
title_sort |
genetic growth potential, rather than phenotypic size, predicts migration phenotype in atlantic salmon |
publisher |
The Royal Society |
publishDate |
2020 |
url |
http://dx.doi.org/10.1098/rspb.2020.0867 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2020.0867 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2020.0867 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 287, issue 1931, page 20200867 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdf https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2020.0867 |
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Proceedings of the Royal Society B: Biological Sciences |
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287 |
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1931 |
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20200867 |
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1810432173405110272 |