ArticleMolecular biology and evolution2021
Divergence and Remarkable Diversity of the Y Chromosome in Guppies.
Article in Molecular biology and evolution, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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24 citing papers in PubMed, 66 citations in OpenAlex.
- Conserved sex-biased DNA methylation patterns target key developmental genes and reproductive function in two Poeciliidae species.G3 (Bethesda, Md.) · 2026Article
- Ancient inversion polymorphisms associate with sexually selected traits across natural guppy populations.PLoS biology · 2026Article
- Selective Regimes and Evolutionary Dynamics of Z and W Gametologs Across an Expanded Avian Neo-Sex Chromosome.Genome biology and evolution · 2026Article
- Genome report: Genome of the Amazon guppy (Poecilia bifurca) reveals conservation of sex chromosomes and dosage compensation.G3 (Bethesda, Md.) · 2025Article
- Deep learning reveals the complex genetic architecture of male guppy colouration.Nature ecology & evolution · 2025Article
- Extreme heterochiasmy and high rates of sex-reversed recombination result in large yet homomorphic sex chromosomes in the Emei moustache toad.Genome research · 2025Article
- The evolution of separate sexes in waterhemp is associated with surprising chromosomal diversity and complexity.PLoS biology · 2025Article
- Hiding in plain sight: the Y chromosome and its reinvigorated role in evolutionary processes.Evolution letters · 2025Article
- Sex Chromosome Evolution: Hallmarks and Question Marks.Molecular biology and evolution · 2024Review
- Extensive variation in germline de novo mutations inGenome research · 2023Article
- Evolutionary History of the Poecilia picta Sex Chromosomes.Genome biology and evolution · 2023Article
- Comparison of methodological approaches to the study of young sex chromosomes: A case study in Poecilia.Journal of evolutionary biology · 2022Article
- Partial sex linkage and linkage disequilibrium on the guppy sex chromosome.Molecular ecology · 2022Article
- Representing sex chromosomes in genome assemblies.Cell genomics · 2022Article
- Some thoughts about the words we use for thinking about sex chromosome evolution.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Review
- Are plant and animal sex chromosomes really all that different?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Review
- Article
- Evolution of the canonical sex chromosomes of the guppy and its relatives.G3 (Bethesda, Md.) · 2022Article
- PromethION Sequencing and Assembly of the Genome of Micropoecilia picta, a Fish with a Highly Degenerated Y Chromosome.Genome biology and evolution · 2021Article
- How did the guppy Y chromosome evolve?PLoS genetics · 2021Article
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Authors and funding
6 authors at 3 institutions in 2 countries.
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Abstract
The guppy sex chromosomes show an extraordinary diversity in divergence across populations and closely related species. In order to understand the dynamics of the guppy Y chromosome, we used linked-read sequencing to assess Y chromosome evolution and diversity across upstream and downstream population pairs that vary in predator and food abundance in three replicate watersheds. Based on our population-specific genome assemblies, we first confirmed and extended earlier reports of two strata on the guppy sex chromosomes. Stratum I shows significant accumulation of male-specific sequence, consistent with Y divergence, and predates the colonization of Trinidad. In contrast, Stratum II shows divergence from the X, but no Y-specific sequence, and this divergence is greater in three replicate upstream populations compared with their downstream pair. Despite longstanding assumptions that sex chromosome recombination suppression is achieved through inversions, we find no evidence of inversions associated with either Stratum I or Stratum II. Instead, we observe a remarkable diversity in Y chromosome haplotypes within each population, even in the ancestral Stratum I. This diversity is likely due to gradual mechanisms of recombination suppression, which, unlike an inversion, allow for the maintenance of multiple haplotypes. In addition, we show that this Y diversity is dominated by low-frequency haplotypes segregating in the population, suggesting a link between haplotype diversity and female preference for rare Y-linked color variation. Our results reveal the complex interplay between recombination suppression and Y chromosome divergence at the earliest stages of sex chromosome divergence.
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