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性别决定相关基因的比较基因组学揭示了双动物和哺乳动物之间的共同进化模式,但不是果
Filippo Nicolini1,2, Sergey V Nuzhdin3, Fabrizio Ghiselli1
1Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy.
Molecular ecology
|September 22, 2025
概括
通过分析与性别确定相关的基因 (SRG) 来澄清双动物的性别决定. Dmrt-1L和Sox-H显示出高序列多样性,这表明它们是双体性别确定中的关键基因.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 在许多动物群体中,特别是双动物中,性别决定 (SD) 机制尚不清楚.
- 在多种双鱼物种中研究与性别决定相关的基因 (SRG) 对于理解性系统进化至关重要.
- 缺乏研究双SRG的全面框架,阻碍了进展.
研究的目的:
- 在40多种两动物物种中进行Dmrt,Sox和Fox基因家族的全基因组进化分析.
- 为了确定双动物中潜在的初级性别决定基因.
- 为了比较SRG在双动物中的序列演变与哺乳动物和果等模型系统.
主要方法:
- 对Dmrt,Sox和Fox基因家族的全基因组序列进化分析.
- 对40多种双鱼物种进行了全系遗传分析.
- 在双动物,哺乳动物 (Sry基因) 和果中对SRG序列多样性的比较分析.
主要成果:
- 一个广泛的,基于遗传学信息的双SRG数据集被生成.
- Dmrt-1L和Sox-H在双动物中表现出高度的序列多样性,支持它们作为主要的性别决定基因的作用.
- 哺乳动物Sry基因表现出类似于双Dmrt-1L和Sox-H的序列多样性模式,与果SD级联中的基因不同.
结论:
- Dmrt-1L和Sox-H是双动物中潜在的主要性别决定基因.
- 一些哺乳动物和双SRG之间的序列进化相似之处表明可比性决定级联架构.
- 对比方法对于研究未充分研究的系统和推进对性别决定进化的理解至关重要.
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