Systematics in the (Post)genomic Era: A Look at the Drosophila Model

Yassin, Amir

doi:10.1002/9781119476870.ch4

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…To test for the effect of adaptive introgression on speciation, one should identify an easily measurable phenotype distinguishing a pair of species, deliberately select it in backcross flies for several generations, and then quantify the degree of reproductive isolation of introgressed flies with both parental species. Unfortunately, most sister Drosophila species are usually recognizable only on the basis of subtle differences in their genitalia whose dissection and measuring are quite difficult and laborious (Yassin, 2021). A striking exception is the case of the species pair of D. yakuba and D. santomea, which, in addition to genital differences, also shows a contrasting pigmentation pattern (Lachaise et al, 2000).…”

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Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

David

Ferreira

Jabaud

et al. 2022

Ecology and Evolution

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confidence: 99%

Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

David

Ferreira

Jabaud

et al. 2022

Ecology and Evolution

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Whole mitochondrial genome phylogeny of Drosophilidae

DeSalle,

Oppenheim,

O’Grady

2022

Mitochondrial DNA Part A

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Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

David

Ferreira

Jabaud

et al. 2022

Preprint

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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 one 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 four 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 towards understanding the genome-wide dynamics of speciation-through-introgression.

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Systematics in the (Post)genomic Era: A Look at the Drosophila Model

Cited by 3 publications

References 35 publications

Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

Whole mitochondrial genome phylogeny of Drosophilidae

Evolution of assortative mating following selective introgression of pigmentation genes between two Drosophila species

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