性染色体的同态性差异与（石龙子科：蜥蜴亚科）性别决定的种群分歧有关。

Differences in Homomorphic Sex Chromosomes Are Associated with Population Divergence in Sex Determination in (Scincidae: Lygosominae).

机构信息

Discipline of Biological Sciences, University of Tasmania, Private Bag 5, Sandy Bay, TAS 7000, Australia.

Institute for Applied Ecology, University of Canberra, Bruce, ACT 2601, Australia.

出版信息

Cells. 2021 Feb 1;10(2):291. doi: 10.3390/cells10020291.

Sex determination directs development as male or female in sexually reproducing organisms. Evolutionary transitions in sex determination have occurred frequently, suggesting simple mechanisms behind the transitions, yet their detail remains elusive. Here we explore the links between mechanisms of transitions in sex determination and sex chromosome evolution at both recent and deeper temporal scales (<1 Myr; ~79 Myr). We studied a rare example of a species with intraspecific variation in sex determination, , and a relative, , using c-banding and mapping of repeat motifs and a custom Y chromosome probe set to identify the sex chromosomes. We identified both unique and conserved regions of the Y chromosome among populations differing in sex determination. There was no evidence for homology of sex chromosomes between and , suggesting independent evolutionary origins. We discuss sex chromosome homology between members of the subfamily Lygosominae and propose links between sex chromosome evolution, sex determination transitions, and karyotype evolution.

性别决定指导有性生殖生物向雄性或雌性发育。性别决定的进化转变经常发生，这表明转变背后有简单的机制，但它们的细节仍然难以捉摸。在这里，我们在近期和更深远的时间尺度（<1 百万年；~79 百万年）上探讨了性别决定转变机制与性染色体进化之间的联系。我们研究了一个具有种内性别决定变异的物种的罕见例子，即，以及一个相对的，，使用 C-带和重复基序的作图以及一个自定义的 Y 染色体探针集来识别性染色体。我们在性别决定不同的种群中鉴定了 Y 染色体的独特和保守区域。在和之间没有性染色体同源性的证据，这表明它们有独立的进化起源。我们讨论了 Lygosominae 亚科成员之间的性染色体同源性，并提出了性染色体进化、性别决定转变和核型进化之间的联系。