自我主义促进了分离破坏者的扩散和侵入 在雌雄性植物中的分离破坏者
Hongru Wang1,2,3, Léo Planche4, Vladimir Shchur5
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.
Molecular biology and evolution
|June 27, 2024
概括
自我,一种近亲繁殖的形式,意外地有助于植物中的分离扭曲器 (SDs). 这些遗传元素利用自我来增加它们的传播,甚至跨越了物种界限.
科学领域:
- 进化遗传学的进化遗传学
- 人口遗传学 人口遗传学
- 植物生物学 植物生物学
背景情况:
- 分离扭曲者 (SDs) 是偏向遗传模式的遗传元素,促进它们自己的传播.
- 虽然亲生繁殖通常被视为对SD的防御,但它在植物系统中的作用是复杂的.
- SDs可能会造成健身成本,但它们的传播在各种生物体中被观察到.
研究的目的:
- 调查亲生繁殖,特别是自我繁殖对异性植物分离扭曲者的种群动态的影响.
- 阐明自私影响花粉杀手SDs传播的机制.
- 检查SDs在跨物种基因流和内进化的作用,使用大米作为模型.
主要方法:
- 理论建模SD动态在一个两个位置的毒素-解毒剂系统下.
- 分析与重组和等位基因频率相关的种群遗传学原理.
- 对大米 (Oryza sativa L.) 中分子特征SDs的审查及其对杂交的含义.
主要成果:
- 自杀显著促进了花粉杀手SDs的传播,因为它减少了杀手和解毒剂位点之间的重组.
- 自我增加SD等位基因在单个花中的局部频率,增强它们的传播.
- 米中具有分子特征的SDs涉及跨物种杂交和内进,作为基因流动的驱动因素.
结论:
- 矛盾的是,通过自我进行亲生繁殖有助于分离扭曲物在雌雄性植物中的传播.
- SDs可以克服预期的基因流动障碍,促进跨种类的内进攻.
- 这些发现挑战了传统的观点,认为近亲繁殖是对自私的遗传元素的唯一防御.
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