Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species
Abstract Adaptive introgression is ubiquitous in animals, but experimental support for its role in driving speciation remains scarce. In the absence of conscious selection, admixed laboratory strains of Drosophila asymmetrically and progressively lose alleles from one parental species and reproducti...
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Wiley
2022-04-01
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Series: | Ecology and Evolution |
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Online Access: | https://doi.org/10.1002/ece3.8821 |
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author | Jean R. David Erina A. Ferreira Laure Jabaud David Ogereau Héloïse Bastide Amir Yassin |
author_facet | Jean R. David Erina A. Ferreira Laure Jabaud David Ogereau Héloïse Bastide Amir Yassin |
author_sort | Jean R. David |
collection | DOAJ |
description | Abstract Adaptive introgression is ubiquitous in animals, but experimental support for its role in driving speciation remains scarce. In the absence of conscious selection, admixed laboratory strains of Drosophila asymmetrically and progressively lose alleles from one parental species and reproductive isolation against the predominant parent ceases after 10 generations. Here, we selectively introgressed during 1 year light pigmentation genes of D. santomea into the genome of its dark sibling D. yakuba, and vice versa. We found that the pace of phenotypic change differed between the species and the sexes and identified through genome sequencing common as well as distinct introgressed loci in each species. Mating assays showed that assortative mating between introgressed flies and both parental species persisted even after 4 years (~60 generations) from the end of the selection. Those results indicate that selective introgression of as low as 0.5% of the genome can beget morphologically distinct and reproductively isolated strains, two prerequisites for the delimitation of new species. Our findings hence represent a significant step toward understanding the genome‐wide dynamics of speciation‐through‐introgression. |
first_indexed | 2024-04-10T15:03:05Z |
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institution | Directory Open Access Journal |
issn | 2045-7758 |
language | English |
last_indexed | 2024-04-10T15:03:05Z |
publishDate | 2022-04-01 |
publisher | Wiley |
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series | Ecology and Evolution |
spelling | doaj.art-6d95350b579840e983542b2bb6addd212023-02-15T09:01:28ZengWileyEcology and Evolution2045-77582022-04-01124n/an/a10.1002/ece3.8821Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila speciesJean R. David0Erina A. Ferreira1Laure Jabaud2David Ogereau3Héloïse Bastide4Amir Yassin5Laboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceLaboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceLaboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceLaboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceLaboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceLaboratoire Évolution, Génomes, Comportement et Écologie CNRS IRD Université Paris‐Saclay – Institut Diversité Ecologie et Evolution du Vivant (IDEEV) Gif‐sur‐Yvette FranceAbstract Adaptive introgression is ubiquitous in animals, but experimental support for its role in driving speciation remains scarce. In the absence of conscious selection, admixed laboratory strains of Drosophila asymmetrically and progressively lose alleles from one parental species and reproductive isolation against the predominant parent ceases after 10 generations. Here, we selectively introgressed during 1 year light pigmentation genes of D. santomea into the genome of its dark sibling D. yakuba, and vice versa. We found that the pace of phenotypic change differed between the species and the sexes and identified through genome sequencing common as well as distinct introgressed loci in each species. Mating assays showed that assortative mating between introgressed flies and both parental species persisted even after 4 years (~60 generations) from the end of the selection. Those results indicate that selective introgression of as low as 0.5% of the genome can beget morphologically distinct and reproductively isolated strains, two prerequisites for the delimitation of new species. Our findings hence represent a significant step toward understanding the genome‐wide dynamics of speciation‐through‐introgression.https://doi.org/10.1002/ece3.8821experimental speciationgenome mappinghybridizationmate choicepigmentation |
spellingShingle | Jean R. David Erina A. Ferreira Laure Jabaud David Ogereau Héloïse Bastide Amir Yassin Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species Ecology and Evolution experimental speciation genome mapping hybridization mate choice pigmentation |
title | Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species |
title_full | Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species |
title_fullStr | Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species |
title_full_unstemmed | Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species |
title_short | Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species |
title_sort | evolution of assortative mating following selective introgression of pigmentation genes between two drosophila species |
topic | experimental speciation genome mapping hybridization mate choice pigmentation |
url | https://doi.org/10.1002/ece3.8821 |
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