期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/ijms231911146
关键词
sex-chromosome; homomorphy; turnover; X-Y recombination
资金
- National Natural Science Foundation of China [NSFC32170419]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2019362]
- Second Tibetan Plateau Scientific Expedition and Research (STEP) program [2019QZKK0501]
In contrast to birds and mammals, cold-blooded vertebrates often have homomorphic sex chromosomes. This study on the torrent frog genus Amolops revealed that the homomorphy of sex chromosomes in these frogs is a result of turnover and X-Y recombination. Furthermore, the sex chromosomes in Amolops show heterogeneous evolution, with both homologous and non-homologous chromosomes involved. The turnover rate of non-homologous sex chromosomes is low in these torrent frogs.
In sharp contrast to birds and mammals, in numerous cold-blooded vertebrates, sex chromosomes have been described as homomorphic. This sex chromosome homomorphy has been suggested to result from the high turnovers often observed across deeply diverged clades. However, little is known about the tempo and mode of sex chromosome evolution among the most closely related species. Here, we examined the evolution of sex chromosome among nine species of the torrent frog genus Amolops. We analyzed male and female GBS and RAD-seq from 182 individuals and performed PCR verification for 176 individuals. We identified signatures of sex chromosomes involving two pairs of chromosomes. We found that sex-chromosome homomorphy results from both turnover and X-Y recombination in the Amolops species, which simultaneously exhibits heterogeneous evolution on homologous and non-homologous sex chromosomes. A low turnover rate of non-homologous sex chromosomes exists in these torrent frogs. The ongoing X-Y recombination in homologous sex chromosomes will act as an indispensable force in preventing sex chromosomes from differentiating.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据