Department of Biological Sciences, Marquette University, Milwaukee, WI 53233, USA.
Keck Science Department, Scripps College, Claremont, CA 91711, USA.
Genes (Basel). 2021 Jan 19;12(1):116. doi: 10.3390/genes12010116.
Lizards and snakes (squamates) are known for their varied sex determining systems, and gecko lizards are especially diverse, having evolved sex chromosomes independently multiple times. While sex chromosomes frequently turnover among gecko genera, intrageneric turnovers are known only from and . Here, we used RADseq to identify sex-specific markers in two species of Burmese bent-toed geckos. We uncovered XX/XY sex chromosomes in and ZZ/ZW sex chromosomes in . This is the third instance of intrageneric turnover of sex chromosomes in geckos. Additionally, are closely related to another genus with intrageneric turnover, . Together, these data suggest that sex chromosome turnover may be common in this clade, setting them apart as exceptionally diverse in a group already known for diverse sex determination systems.
蜥蜴和蛇（有鳞目）以其多样化的性别决定系统而闻名，而壁虎蜥蜴尤其多样化，它们已经独立地多次进化出性染色体。虽然性染色体在壁虎属中经常更替，但属内更替仅见于 和 。在这里，我们使用 RADseq 在两种缅甸弯趾壁虎中鉴定出性别特异性标记。我们在 中发现了 XX/XY 性染色体，在 中发现了 ZZ/ZW 性染色体。这是壁虎属内第三次性染色体更替。此外， 与另一个具有属内更替的属 密切相关。这些数据表明，性染色体更替可能在这个分支中很常见，使它们在一个已经以多样化性别决定系统而闻名的群体中显得异常多样化。
