Rapid increase in southern elephant seal genetic diversity after a founder event
Genetic diversity provides the raw material for populations to respond to changing environmental conditions. The evolution of diversity within populations is based on the accumulation of mutations and their retention or loss through selection and genetic drift, while migration can also introduce new...
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ftpubmed:oai:pubmedcentral.nih.gov:3924085 2023-05-15T16:05:12+02:00 Rapid increase in southern elephant seal genetic diversity after a founder event de Bruyn, Mark Pinsky, Malin L. Hall, Brenda Koch, Paul Baroni, Carlo Hoelzel, A. Rus 2014-03-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3924085 http://www.ncbi.nlm.nih.gov/pubmed/24478305 https://doi.org/10.1098/rspb.2013.3078 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24478305 http://dx.doi.org/10.1098/rspb.2013.3078 © 2014 The Author(s) Published by the Royal Society. All rights reserved. Research Articles Text 2014 ftpubmed https://doi.org/10.1098/rspb.2013.3078 2015-03-29T00:55:24Z Genetic diversity provides the raw material for populations to respond to changing environmental conditions. The evolution of diversity within populations is based on the accumulation of mutations and their retention or loss through selection and genetic drift, while migration can also introduce new variation. However, the extent to which population growth and sustained large population size can lead to rapid and significant increases in diversity has not been widely investigated. Here, we assess this empirically by applying approximate Bayesian computation to a novel ancient DNA dataset that spans the life of a southern elephant seal (Mirounga leonina) population, from initial founding approximately 7000 years ago to eventual extinction within the past millennium. We find that rapid population growth and sustained large population size can explain substantial increases in population genetic diversity over a period of several hundred generations, subsequently lost when the population went to extinction. Results suggest that the impact of diversity introduced through migration was relatively minor. We thus demonstrate, by examining genetic diversity across the life of a population, that environmental change could generate the raw material for adaptive evolution over a very short evolutionary time scale through rapid establishment of a large, stable population. Text Elephant Seal Mirounga leonina Southern Elephant Seal PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 281 1779 20133078 |
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Research Articles de Bruyn, Mark Pinsky, Malin L. Hall, Brenda Koch, Paul Baroni, Carlo Hoelzel, A. Rus Rapid increase in southern elephant seal genetic diversity after a founder event |
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Research Articles |
description |
Genetic diversity provides the raw material for populations to respond to changing environmental conditions. The evolution of diversity within populations is based on the accumulation of mutations and their retention or loss through selection and genetic drift, while migration can also introduce new variation. However, the extent to which population growth and sustained large population size can lead to rapid and significant increases in diversity has not been widely investigated. Here, we assess this empirically by applying approximate Bayesian computation to a novel ancient DNA dataset that spans the life of a southern elephant seal (Mirounga leonina) population, from initial founding approximately 7000 years ago to eventual extinction within the past millennium. We find that rapid population growth and sustained large population size can explain substantial increases in population genetic diversity over a period of several hundred generations, subsequently lost when the population went to extinction. Results suggest that the impact of diversity introduced through migration was relatively minor. We thus demonstrate, by examining genetic diversity across the life of a population, that environmental change could generate the raw material for adaptive evolution over a very short evolutionary time scale through rapid establishment of a large, stable population. |
format |
Text |
author |
de Bruyn, Mark Pinsky, Malin L. Hall, Brenda Koch, Paul Baroni, Carlo Hoelzel, A. Rus |
author_facet |
de Bruyn, Mark Pinsky, Malin L. Hall, Brenda Koch, Paul Baroni, Carlo Hoelzel, A. Rus |
author_sort |
de Bruyn, Mark |
title |
Rapid increase in southern elephant seal genetic diversity after a founder event |
title_short |
Rapid increase in southern elephant seal genetic diversity after a founder event |
title_full |
Rapid increase in southern elephant seal genetic diversity after a founder event |
title_fullStr |
Rapid increase in southern elephant seal genetic diversity after a founder event |
title_full_unstemmed |
Rapid increase in southern elephant seal genetic diversity after a founder event |
title_sort |
rapid increase in southern elephant seal genetic diversity after a founder event |
publisher |
The Royal Society |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3924085 http://www.ncbi.nlm.nih.gov/pubmed/24478305 https://doi.org/10.1098/rspb.2013.3078 |
genre |
Elephant Seal Mirounga leonina Southern Elephant Seal |
genre_facet |
Elephant Seal Mirounga leonina Southern Elephant Seal |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24478305 http://dx.doi.org/10.1098/rspb.2013.3078 |
op_rights |
© 2014 The Author(s) Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rspb.2013.3078 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
281 |
container_issue |
1779 |
container_start_page |
20133078 |
_version_ |
1766401090299887616 |