Scholarlink

<p>A few species have evolved multiple sex chromosome systems with more than two Xs or Ys due to sex chromosome-autosome translocations. Among vertebrates, frogs (Anura) have the highest known number of such neo-sex chromosome systems, making them interesting for studying how such systems evolve. In this work,&#xa0;we investigated two <i>Leptodactylus</i> species, <i>L. pentadactylus</i> (LPE) and <i>L. paraensis</i> (LPA), with large ring multivalents in male meiosis, using genomic and cytogenetic investigation of repetitive DNA sequences, including satellite DNAs (satDNAs), and transposable elements (TEs). SatDNA mapping identify individual chromosomes in the LPE ring, and morphologies suggest that all chromosomes are shared with the LPA ring although a common ring origin is not firmly supported. In situ mapping suggests recent satDNA accumulation in subtelomeric regions since the split from the outgroups, likely unrelated to the translocations that created sex-linkage, which probably involved breaks in the pericentromeric regions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigating the evolution of large meiotic rings of multiple X and Y sex chromosomes in two Leptodactylus frog species (Anura, Leptodactylidae)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月21日

查看全文
  • Jhon Alex Dziechciarz Vidal,
  • Deborah Charlesworth,
  • Wen-Juan Ma,
  • Qi Zhou,
  • Ricardo Utsunomia,
  • Anderson José Baia Gomes,
  • Amanda Bueno da Silva,
  • Fábio Porto-Foresti,
  • Thomas Liehr,
  • Marcelo de Bello Cioffi

摘要

A few species have evolved multiple sex chromosome systems with more than two Xs or Ys due to sex chromosome-autosome translocations. Among vertebrates, frogs (Anura) have the highest known number of such neo-sex chromosome systems, making them interesting for studying how such systems evolve. In this work, we investigated two Leptodactylus species, L. pentadactylus (LPE) and L. paraensis (LPA), with large ring multivalents in male meiosis, using genomic and cytogenetic investigation of repetitive DNA sequences, including satellite DNAs (satDNAs), and transposable elements (TEs). SatDNA mapping identify individual chromosomes in the LPE ring, and morphologies suggest that all chromosomes are shared with the LPA ring although a common ring origin is not firmly supported. In situ mapping suggests recent satDNA accumulation in subtelomeric regions since the split from the outgroups, likely unrelated to the translocations that created sex-linkage, which probably involved breaks in the pericentromeric regions.