ArticleProceedings of the National Academy of Sciences of the United States of America2022
Neo-sex chromosome evolution shapes sex-dependent asymmetrical introgression barrier.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- A population genomic resource for Drosophila pseudoobscura.G3 (Bethesda, Md.) · 2026Article
- Same Sex Chromosomes With Independent Origins in Haplochromine Cichlids.Genome biology and evolution · 2026Article
- Widespread introgression and a potential role for a neo-sex chromosome in booby diversification and speciation.bioRxiv : the preprint server for biology · 2026Article
- Population genomics ofbioRxiv : the preprint server for biology · 2026Article
- Genome Architecture and Speciation in Plants and Animals.Molecular ecology · 2025Review
- Easy-to-use R functions to separate reduced-representation genomic datasets into sex-linked and autosomal loci, and conduct sex assignment.Molecular ecology resources · 2025Article
- Orthopteran Neo-Sex Chromosomes Reveal Dynamics of Recombination Suppression and Evolution of Supergenes.Molecular ecology · 2024Article
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- Satellite DNAs and the evolution of the multiple XScientific reports · 2024Article
- Comparative genomics illuminates karyotype and sex chromosome evolution of sharks.Cell genomics · 2024Article
- Recent secondary contact, genome-wide admixture, and asymmetric introgression of neo-sex chromosomes between two Pacific island bird species.PLoS genetics · 2024Article
- Sex chromosome turnover plays an important role in the maintenance of barriers to post-speciation introgression in willows.Evolution letters · 2024Article
- Chromosomal conservatism vs chromosomal megaevolution: enigma of karyotypic evolution in Lepidoptera.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2023Article
- Article
- Widespread introgression across a phylogeny of 155 Drosophila genomes.Current biology : CB · 2022Article
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9 authors.
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Abstract
Sex chromosomes play a special role in the evolution of reproductive barriers between species. Here we describe conflicting roles of nascent sex chromosomes on patterns of introgression in an experimental hybrid swarm. Drosophila nasuta and Drosophila albomicans are recently diverged, fully fertile sister species that have different sex chromosome systems. The fusion between an autosome (Muller CD) with the ancestral X and Y gave rise to neo-sex chromosomes in D. albomicans, while Muller CD remains unfused in D. nasuta. We found that a large block containing overlapping inversions on the neo-sex chromosome stood out as the strongest barrier to introgression. Intriguingly, the neo-sex chromosome introgression barrier is asymmetrical and sex-dependent. Female hybrids showed significant D. albomicans–biased introgression on Muller CD (neo-X excess), while males showed heterosis with excessive (neo-X, D. nasuta Muller CD) genotypes. We used a population genetic model to dissect the interplay of sex chromosome drive, heterospecific pairing incompatibility between the neo-sex chromosomes and unfused Muller CD, neo-Y disadvantage, and neo-X advantage in generating the observed sex chromosome genotypes in females and males. We show that moderate neo-Y disadvantage and D. albomicans specific meiotic drive are required to observe female-specific D. albomicans–biased introgression in this system, together with pairing incompatibility and neo-X advantage. In conclusion, this hybrid swarm between a young species pair sheds light onto the multifaceted roles of neo-sex chromosomes in a sex-dependent asymmetrical introgression barrier at a species boundary.
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