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Multiple Transitions between Y Chromosome and Autosome in Tago’s Brown Frog Species Complex

Genes, ISSN: 2073-4425, Vol: 15, Issue: 3
2024
  • 1
    Citations
  • 0
    Usage
  • 5
    Captures
  • 2
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    1
  • Captures
    5
  • Mentions
    2
    • News Mentions
      2
      • News
        2

Most Recent News

Mystery of Japanese brown frog sex-chromosome swapping solved

In cold-blooded species such as fish, reptiles and amphibians, their sex chromosomes are not static entities, but over the course of their evolving into new,

Article Description

Sex chromosome turnover is the transition between sex chromosomes and autosomes. Although many cases have been reported in poikilothermic vertebrates, their evolutionary causes and genetic mechanisms remain unclear. In this study, we report multiple transitions between the Y chromosome and autosome in the Japanese Tago’s brown frog complex. Using chromosome banding and molecular analyses (sex-linked and autosomal single nucleotide polymorphisms, SNPs, from the nuclear genome), we investigated the frogs of geographic populations ranging from northern to southern Japan of two species, Rana tagoi and Rana sakuraii (2n = 26). Particularly, the Chiba populations of East Japan and Akita populations of North Japan in R. tagoi have been, for the first time, investigated here. As a result, we identified three different sex chromosomes, namely chromosomes 3, 7, and 13, in the populations of the two species. Furthermore, we found that the transition between the Y chromosome (chromosome 7) and autosome was repeated through hybridization between two or three different populations belonging to the two species, followed by restricted chromosome introgression. These dynamic sex chromosome turnovers represent the first such findings in vertebrates and imply that speciation associated with inter- or intraspecific hybridization plays an important role in sex chromosome turnover in frogs.

Bibliographic Details

Miura, Ikuo; Shams, Foyez; Ohki, Jun'ichi; Tagami, Masataka; Fujita, Hiroyuki; Kuwana, Chiao; Nanba, Chiyo; Matsuo, Takanori; Ogata, Mitsuaki; Mawaribuchi, Shuuji; Shimizu, Norio; Ezaz, Tariq

MDPI AG

Biochemistry, Genetics and Molecular Biology; Medicine

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