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Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster

The nascent stages of speciation start with the emergence of sexual isolation. Understanding the influence of reproductive barriers in this evolutionary process is an ongoing effort. We present a study of Drosophila melanogaster admixed populations from the southeast United States and the Caribbean...

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Autores principales: Kao, Joyce Y, Lymer, Seana, Hwang, Sea H, Sung, Albert, Nuzhdin, Sergey V
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4559059/
https://www.ncbi.nlm.nih.gov/pubmed/26357543
http://dx.doi.org/10.1002/ece3.1596
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author Kao, Joyce Y
Lymer, Seana
Hwang, Sea H
Sung, Albert
Nuzhdin, Sergey V
author_facet Kao, Joyce Y
Lymer, Seana
Hwang, Sea H
Sung, Albert
Nuzhdin, Sergey V
author_sort Kao, Joyce Y
collection PubMed
description The nascent stages of speciation start with the emergence of sexual isolation. Understanding the influence of reproductive barriers in this evolutionary process is an ongoing effort. We present a study of Drosophila melanogaster admixed populations from the southeast United States and the Caribbean islands known to be a secondary contact zone of European- and African-derived populations undergoing incipient sexual isolation. The existence of premating reproductive barriers has been previously established, but these types of barriers are not the only source shaping sexual isolation. To assess the influence of postmating barriers, we investigated putative postmating barriers of female remating and egg-laying behavior, as well as hatchability of eggs laid and female longevity after mating. In the central region of our putative hybrid zone of American and Caribbean populations, we observed lower hatchability of eggs laid accompanied by increased resistance to harm after mating to less-related males. These results illustrate that postmating reproductive barriers act alongside premating barriers and genetic admixture such as hybrid incompatibilities and influence early phases of sexual isolation.
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spelling pubmed-45590592015-09-09 Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster Kao, Joyce Y Lymer, Seana Hwang, Sea H Sung, Albert Nuzhdin, Sergey V Ecol Evol Original Research The nascent stages of speciation start with the emergence of sexual isolation. Understanding the influence of reproductive barriers in this evolutionary process is an ongoing effort. We present a study of Drosophila melanogaster admixed populations from the southeast United States and the Caribbean islands known to be a secondary contact zone of European- and African-derived populations undergoing incipient sexual isolation. The existence of premating reproductive barriers has been previously established, but these types of barriers are not the only source shaping sexual isolation. To assess the influence of postmating barriers, we investigated putative postmating barriers of female remating and egg-laying behavior, as well as hatchability of eggs laid and female longevity after mating. In the central region of our putative hybrid zone of American and Caribbean populations, we observed lower hatchability of eggs laid accompanied by increased resistance to harm after mating to less-related males. These results illustrate that postmating reproductive barriers act alongside premating barriers and genetic admixture such as hybrid incompatibilities and influence early phases of sexual isolation. John Wiley & Sons, Ltd 2015-08 2015-07-14 /pmc/articles/PMC4559059/ /pubmed/26357543 http://dx.doi.org/10.1002/ece3.1596 Text en © 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Kao, Joyce Y
Lymer, Seana
Hwang, Sea H
Sung, Albert
Nuzhdin, Sergey V
Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title_full Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title_fullStr Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title_full_unstemmed Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title_short Postmating reproductive barriers contribute to the incipient sexual isolation of the United States and Caribbean Drosophila melanogaster
title_sort postmating reproductive barriers contribute to the incipient sexual isolation of the united states and caribbean drosophila melanogaster
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4559059/
https://www.ncbi.nlm.nih.gov/pubmed/26357543
http://dx.doi.org/10.1002/ece3.1596
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