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Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp
Many animal species experiencing spatial or interannual fluctuations of their environment are capable of prolonged diapause, a kind of dormancy that extends over more than one year. Such a prolonged diapause is commonly perceived as a temporal demographic refuge in stochastic environments, but empir...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3732219/ https://www.ncbi.nlm.nih.gov/pubmed/23936470 http://dx.doi.org/10.1371/journal.pone.0070818 |
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author | Suez, Marie Gidoin, Cindy Lefèvre, François Candau, Jean-Noël Chalon, Alain Boivin, Thomas |
author_facet | Suez, Marie Gidoin, Cindy Lefèvre, François Candau, Jean-Noël Chalon, Alain Boivin, Thomas |
author_sort | Suez, Marie |
collection | PubMed |
description | Many animal species experiencing spatial or interannual fluctuations of their environment are capable of prolonged diapause, a kind of dormancy that extends over more than one year. Such a prolonged diapause is commonly perceived as a temporal demographic refuge in stochastic environments, but empirical evidence is still lacking of its consequences on temporal population genetic structures. In this long-term study, we investigated how a particular pattern of prolonged diapause may influence the temporal population genetics of the invasive seed-specialized wasp Megastigmus schimitscheki (Hymenoptera: Torymidae) in southeastern France. We characterized the diapause strategy of M. schimitscheki using records of emergence from diapause in 97 larval cohorts, and we conducted a temporal population genetic study on a natural invasive wasp population sampled during ten consecutive years (1999–2008) using polymorphic microsatellite markers. We found that M. schimitscheki can undergo a prolonged diapause of up to five years and displays two main adult emergence peaks after two and four years of diapause. Such a bimodal and atypical pattern did not disrupt temporal gene flow between cohorts produced in even and in odd years during the period of the study. Unexpectedly, we found that this wasp population consisted of two distinct genetic sub-populations that strongly diverged in their diapause strategies, with very few admixed individuals. One of the sub-populations displayed both short and prolonged diapause (2 and 4 years respectively) in equal proportions, whereas the other sub-population displayed mainly short diapause. This study provided empirical evidence that prolonged diapause phenotypes can substantially contribute to reproduction and impact temporal genetic structures. Prolonged diapause is likely to act as both demographic and genetic refuges for insect populations living in fluctuating environments. |
format | Online Article Text |
id | pubmed-3732219 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-37322192013-08-09 Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp Suez, Marie Gidoin, Cindy Lefèvre, François Candau, Jean-Noël Chalon, Alain Boivin, Thomas PLoS One Research Article Many animal species experiencing spatial or interannual fluctuations of their environment are capable of prolonged diapause, a kind of dormancy that extends over more than one year. Such a prolonged diapause is commonly perceived as a temporal demographic refuge in stochastic environments, but empirical evidence is still lacking of its consequences on temporal population genetic structures. In this long-term study, we investigated how a particular pattern of prolonged diapause may influence the temporal population genetics of the invasive seed-specialized wasp Megastigmus schimitscheki (Hymenoptera: Torymidae) in southeastern France. We characterized the diapause strategy of M. schimitscheki using records of emergence from diapause in 97 larval cohorts, and we conducted a temporal population genetic study on a natural invasive wasp population sampled during ten consecutive years (1999–2008) using polymorphic microsatellite markers. We found that M. schimitscheki can undergo a prolonged diapause of up to five years and displays two main adult emergence peaks after two and four years of diapause. Such a bimodal and atypical pattern did not disrupt temporal gene flow between cohorts produced in even and in odd years during the period of the study. Unexpectedly, we found that this wasp population consisted of two distinct genetic sub-populations that strongly diverged in their diapause strategies, with very few admixed individuals. One of the sub-populations displayed both short and prolonged diapause (2 and 4 years respectively) in equal proportions, whereas the other sub-population displayed mainly short diapause. This study provided empirical evidence that prolonged diapause phenotypes can substantially contribute to reproduction and impact temporal genetic structures. Prolonged diapause is likely to act as both demographic and genetic refuges for insect populations living in fluctuating environments. Public Library of Science 2013-08-02 /pmc/articles/PMC3732219/ /pubmed/23936470 http://dx.doi.org/10.1371/journal.pone.0070818 Text en © 2013 Suez et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Suez, Marie Gidoin, Cindy Lefèvre, François Candau, Jean-Noël Chalon, Alain Boivin, Thomas Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title | Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title_full | Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title_fullStr | Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title_full_unstemmed | Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title_short | Temporal Population Genetics of Time Travelling Insects: A Long Term Study in a Seed-Specialized Wasp |
title_sort | temporal population genetics of time travelling insects: a long term study in a seed-specialized wasp |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3732219/ https://www.ncbi.nlm.nih.gov/pubmed/23936470 http://dx.doi.org/10.1371/journal.pone.0070818 |
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