Genetic change for earlier migration timing in a pink salmon population
To predict how climate change will influence populations, it is necessary to understand the mechanisms, particularly microevolution and phenotypic plasticity, that allow populations to persist in novel environmental conditions. Although evidence for climate-induced phenotypic change in populations i...
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ftpubmed:oai:pubmedcentral.nih.gov:3415923 2023-05-15T17:59:37+02:00 Genetic change for earlier migration timing in a pink salmon population Kovach, Ryan P. Gharrett, Anthony J. Tallmon, David A. 2012-09-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3415923 http://www.ncbi.nlm.nih.gov/pubmed/22787027 https://doi.org/10.1098/rspb.2012.1158 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3415923 http://www.ncbi.nlm.nih.gov/pubmed/22787027 http://dx.doi.org/10.1098/rspb.2012.1158 This journal is © 2012 The Royal Society Research Articles Text 2012 ftpubmed https://doi.org/10.1098/rspb.2012.1158 2013-09-29T00:19:14Z To predict how climate change will influence populations, it is necessary to understand the mechanisms, particularly microevolution and phenotypic plasticity, that allow populations to persist in novel environmental conditions. Although evidence for climate-induced phenotypic change in populations is widespread, evidence documenting that these phenotypic changes are due to microevolution is exceedingly rare. In this study, we use 32 years of genetic data (17 complete generations) to determine whether there has been a genetic change towards earlier migration timing in a population of pink salmon that shows phenotypic change; average migration time occurs nearly two weeks earlier than it did 40 years ago. Experimental genetic data support the hypothesis that there has been directional selection for earlier migration timing, resulting in a substantial decrease in the late-migrating phenotype (from more than 30% to less than 10% of the total abundance). From 1983 to 2011, there was a significant decrease—over threefold—in the frequency of a genetic marker for late-migration timing, but there were minimal changes in allele frequencies at other neutral loci. These results demonstrate that there has been rapid microevolution for earlier migration timing in this population. Circadian rhythm genes, however, did not show any evidence for selective changes from 1993 to 2009. Text Pink salmon PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 279 1743 3870 3878 |
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Research Articles Kovach, Ryan P. Gharrett, Anthony J. Tallmon, David A. Genetic change for earlier migration timing in a pink salmon population |
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Research Articles |
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To predict how climate change will influence populations, it is necessary to understand the mechanisms, particularly microevolution and phenotypic plasticity, that allow populations to persist in novel environmental conditions. Although evidence for climate-induced phenotypic change in populations is widespread, evidence documenting that these phenotypic changes are due to microevolution is exceedingly rare. In this study, we use 32 years of genetic data (17 complete generations) to determine whether there has been a genetic change towards earlier migration timing in a population of pink salmon that shows phenotypic change; average migration time occurs nearly two weeks earlier than it did 40 years ago. Experimental genetic data support the hypothesis that there has been directional selection for earlier migration timing, resulting in a substantial decrease in the late-migrating phenotype (from more than 30% to less than 10% of the total abundance). From 1983 to 2011, there was a significant decrease—over threefold—in the frequency of a genetic marker for late-migration timing, but there were minimal changes in allele frequencies at other neutral loci. These results demonstrate that there has been rapid microevolution for earlier migration timing in this population. Circadian rhythm genes, however, did not show any evidence for selective changes from 1993 to 2009. |
format |
Text |
author |
Kovach, Ryan P. Gharrett, Anthony J. Tallmon, David A. |
author_facet |
Kovach, Ryan P. Gharrett, Anthony J. Tallmon, David A. |
author_sort |
Kovach, Ryan P. |
title |
Genetic change for earlier migration timing in a pink salmon population |
title_short |
Genetic change for earlier migration timing in a pink salmon population |
title_full |
Genetic change for earlier migration timing in a pink salmon population |
title_fullStr |
Genetic change for earlier migration timing in a pink salmon population |
title_full_unstemmed |
Genetic change for earlier migration timing in a pink salmon population |
title_sort |
genetic change for earlier migration timing in a pink salmon population |
publisher |
The Royal Society |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3415923 http://www.ncbi.nlm.nih.gov/pubmed/22787027 https://doi.org/10.1098/rspb.2012.1158 |
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Pink salmon |
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Pink salmon |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3415923 http://www.ncbi.nlm.nih.gov/pubmed/22787027 http://dx.doi.org/10.1098/rspb.2012.1158 |
op_rights |
This journal is © 2012 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2012.1158 |
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Proceedings of the Royal Society B: Biological Sciences |
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279 |
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1743 |
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3870 |
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3878 |
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1766168468333264896 |