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不同的Arabidopsis种群迅速积累起花粉作用的遗传不相容性

Christopher Condon^1,2, Fantin Carpentier³, Marie Tabourin³

¹Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA, United States.

Evolution letters

|September 22, 2025

概括

发现分离扭曲是物种化的一个关键因素,在阿拉比多普西斯物种的杂交物种中是常见的. 它的频率和强度随着遗传距离的变化而变化,表明了快速的进化和表皮病在生殖隔离中的作用.

科学领域:

进化生物学进化生物学
遗传学遗传学是一个

背景情况:

生殖隔离对于物种化至关重要,但生殖障碍的机制和基因组模式尚未得到充分理解.
混合体中被破坏的共同适应的基因相互作用和自私的遗传元素被认为是分离扭曲的原因,影响孟德尔遗传.

研究的目的:

检测和量化Arabidopsis lyrata和Arabidopsis halleri的交叉分离扭曲,这些物种处于早期物种化阶段.
调查遗传距离和隔离扭曲之间的关系.
为了确定基因组区域和分离扭曲的进化动态.

主要方法:

分析了各种Arabidopsis lyrata和A. halleri种群交叉的基因组间的分离扭曲.
对比内部和跨物种杂交物种的扭曲模式.
识别具有非独立扭曲效应的基因组区域.

主要成果:

在基因相似的父母的交叉中没有分离扭曲,但在更遥远的交叉中非常可变.
干扰器位点表现出快速的进化,出现在跨物种和内物种杂交物种中.
两个特定的基因组区域表现出一致的相反的扭曲效应,表明了负面的表观症.

结论:

花粉作用分离扭曲是普遍存在的,有助于Arabidopsis物种之间的繁殖隔离以及最近分离的种群中的繁殖隔离.
阴性表观似乎是混合隔离扭曲演变的重要驱动因素.
分离扭曲是早期物种化中的动态进化力.

关键词:

阿拉比多普西斯 (Arabidopsis) 是一种植物.大量游戏群的测序.生殖障碍物生殖障碍物分离的扭曲,分离的扭曲种类的变化种类的变化

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