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在蝶中以异性为基础的性别确定驱动了男性化器的超变性
Arjen E Van't Hof1,2, Sam Whiteford1, Carl J Yung1
1Department of Evolution, Ecology and Behaviour, University of Liverpool, Liverpool L69 7ZB, UK.
Science advances
|May 3, 2024
概括
在Bicyclus anynana蝶中,一个单一的基因 (BaMasc) 决定性别. 在BaMasc中的等位基多样性驱动着进化,因为同位基死去,有利于异位基的男性发展.
科学领域:
- 遗传学 遗传学 是一个
- 进化生物学 进化生物学
- 昆虫学 昆虫学是一门学科.
背景情况:
- 性别决定机制在物种之间有很大差异.
- 类,包括蝶和,具有多样化的性别确定系统,通常涉及ZW染色体.
- 以前对Bicyclus anynana的性别决定的理解是不完整的.
研究的目的:
- 为了确定Bicyclus anynana中主要的性别决定开关.
- 为了研究塑造这种物种性别决定的进化压力.
- 探索昆虫性别决定中的潜在分子融合.
主要方法:
- 在Bicyclus anynana中对BaMasc基因的遗传分析.
- 测序BaMasc等位基因以评估多样性.
- 对BaMasc与其他昆虫物种的相关基因进行比较分析.
主要成果:
- 与Z相关的基因BaMasc作为Bicyclus anynana中的主要性别决定开关.
- 在BaMasc的异位异位导致男性发育 (ZZ),而单个等位基因导致女性发育 (ZW或Z0).
- 同胞卵 (ZZ) 启动雌性发育,但由于剂量补偿问题而死亡,导致极端的等位基因多样性 (发现了205种变异).
结论:
- 巴马斯克基因的等位基因多样性是对同胞卵的强烈选择的结果.
- 这种机制代表了Lepidoptera的一种新型的性别决定系统,在没有女性特异性基因的情况下运行.
- BaMasc和蜜蜂cSD基因之间的结构相似性表明,在昆虫的性别确定中存在分子融合.
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