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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Main Authors: Jean R. David, Erina A. Ferreira, Laure Jabaud, David Ogereau, Héloïse Bastide, Amir Yassin
Format: Article
Language:English
Published: Wiley 2022-04-01
Series:Ecology and Evolution
Subjects:
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.
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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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