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Showing 1–10 of 10 results
Advanced filters: Author: Catherine L. Peichel Clear advanced filters

  • Closely related species often have different sex-chromosome systems, but it is not known whether sex-chromosome turnover contributes to the evolution of reproductive isolation between species. Here, a neo-sex chromosome is identified in only one member of a sympatric species pair of stickleback fish in Japan. The newly evolved sex chromosome is found to contain genes that contribute to speciation, suggesting that sex-chromosome turnover might have a greater role in speciation than was previously appreciated.

    • Jun Kitano
    • Joseph A. Ross
    • Catherine L. Peichel
    Research
    Nature
    Volume: 461, P: 1079-1083

  • A sequence assembly of the chicken W chromosome enables reconstruction of the gene content of the W chromosome across 14 bird species and shows striking similarities in the maintenance of broadly expressed and dosage-sensitive genes on highly degenerate sex chromosomes in both birds and mammals. However, the chicken W chromosome is not enriched for genes with expression in female-specific tissues, providing an intriguing contrast to the acquisition and amplification of genes with testis-specific expression on mammalian Y chromosomes and suggesting that the inheritance of chromosomes solely through females or males can lead to different evolutionary outcomes.

    • Catherine L Peichel
    News & Views
    Nature Genetics
    Volume: 49, P: 321-322

  • Environmental heterogeneity in three-spined stickleback pairs contributes to deviations from parallel evolution, but genomic targets of selection were more parallel between environmentally similar pairs, suggestive of a continuum of parallel evolution.

    • Yoel E. Stuart
    • Thor Veen
    • Daniel I. Bolnick
    Research
    Nature Ecology & Evolution
    Volume: 1, P: 1-7

  • Traits responsible for recent niche divergence between sympatric threespine stickleback species are subjected to forward genetic analysis; additive variation at several loci across the genome accounts for most of the genetic basis of ecological divergence, with a further role for epistatic interactions that disadvantage hybrids.

    • Matthew E. Arnegard
    • Matthew D. McGee
    • Dolph Schluter
    Research
    Nature
    Volume: 511, P: 307-311

  • Genomic approaches are an increasingly important aspect of speciation research. The authors review recent insights from speciation genomics and propose a roadmap for this field, which is aimed at addressing both long-standing and emerging questions about speciation.

    • Ole Seehausen
    • Roger K. Butlin
    • Alex Widmer
    Reviews
    Nature Reviews Genetics
    Volume: 15, P: 176-192