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Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression
The study of speciation has advanced considerably in the last decades because of the increased application of molecular tools. In particular, the quantification of gene flow between recently diverged species could be addressed. Drosophila simulans and Drosophila mauritiana diverged, probably allopat...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Ltd
2010
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3035818/ https://www.ncbi.nlm.nih.gov/pubmed/20958812 http://dx.doi.org/10.1111/j.1365-294X.2010.04838.x |
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author | Nunes, Maria D S Orozco-Ter Wengel, Pablo Kreissl, Michaela Schlötterer, Christian |
author_facet | Nunes, Maria D S Orozco-Ter Wengel, Pablo Kreissl, Michaela Schlötterer, Christian |
author_sort | Nunes, Maria D S |
collection | PubMed |
description | The study of speciation has advanced considerably in the last decades because of the increased application of molecular tools. In particular, the quantification of gene flow between recently diverged species could be addressed. Drosophila simulans and Drosophila mauritiana diverged, probably allopatrically, from a common ancestor approximately 250 000 years ago. However, these species share one mitochondrial DNA (mtDNA) haplotype indicative of a recent episode of introgression. To study the extent of gene flow between these species, we took advantage of a large sample of D. mauritiana and employed a range of different markers, i.e. nuclear and mitochondrial sequences, and microsatellites. This allowed us to detect two new mtDNA haplotypes (MAU3 and MAU4). These haplotypes diverged quite recently from haplotypes of the siII group present in cosmopolitan populations of D. simulans. The mean divergence time of the most diverged haplotype (MAU4) is approximately 127 000 years, which is more than 100 000 years before the assumed speciation time. Interestingly, we also found some evidence for gene flow at the nuclear level because an excess of putatively neutral loci shows significantly reduced differentiation between D. simulans and D. mauritiana. Our results suggest that these species are exchanging genes more frequently than previously thought. |
format | Text |
id | pubmed-3035818 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Blackwell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-30358182011-02-14 Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression Nunes, Maria D S Orozco-Ter Wengel, Pablo Kreissl, Michaela Schlötterer, Christian Mol Ecol Original Articles The study of speciation has advanced considerably in the last decades because of the increased application of molecular tools. In particular, the quantification of gene flow between recently diverged species could be addressed. Drosophila simulans and Drosophila mauritiana diverged, probably allopatrically, from a common ancestor approximately 250 000 years ago. However, these species share one mitochondrial DNA (mtDNA) haplotype indicative of a recent episode of introgression. To study the extent of gene flow between these species, we took advantage of a large sample of D. mauritiana and employed a range of different markers, i.e. nuclear and mitochondrial sequences, and microsatellites. This allowed us to detect two new mtDNA haplotypes (MAU3 and MAU4). These haplotypes diverged quite recently from haplotypes of the siII group present in cosmopolitan populations of D. simulans. The mean divergence time of the most diverged haplotype (MAU4) is approximately 127 000 years, which is more than 100 000 years before the assumed speciation time. Interestingly, we also found some evidence for gene flow at the nuclear level because an excess of putatively neutral loci shows significantly reduced differentiation between D. simulans and D. mauritiana. Our results suggest that these species are exchanging genes more frequently than previously thought. Blackwell Publishing Ltd 2010-11 /pmc/articles/PMC3035818/ /pubmed/20958812 http://dx.doi.org/10.1111/j.1365-294X.2010.04838.x Text en Copyright © 2010 Blackwell Publishing Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
spellingShingle | Original Articles Nunes, Maria D S Orozco-Ter Wengel, Pablo Kreissl, Michaela Schlötterer, Christian Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title | Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title_full | Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title_fullStr | Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title_full_unstemmed | Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title_short | Multiple hybridization events between Drosophila simulans and Drosophila mauritiana are supported by mtDNA introgression |
title_sort | multiple hybridization events between drosophila simulans and drosophila mauritiana are supported by mtdna introgression |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3035818/ https://www.ncbi.nlm.nih.gov/pubmed/20958812 http://dx.doi.org/10.1111/j.1365-294X.2010.04838.x |
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