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有限的定向选择,但在A.的印记基因中具有共同进化的信号. 利拉塔 (lyrata) 是一个名字

Audrey Le Veve^1,2, Ömer İltaş^2,3, Julien Y Dutheil⁴

¹IHPE, Univ Perpignan Via Domitia, CNRS, IFREMER, Univ Montpellier, Perpignan, France.

bioRxiv : the preprint server for biology

|November 24, 2025

概括

基因组印记,一种基因调节过程,显示了植物中的平衡选择,支持亲缘关系理论. 观察到印制基因之间的共同进化,由蛋白质序列之外的因素驱动.

科学领域:

进化生物学进化生物学
遗传学遗传学是一个
分子生物学分子生物学

背景情况:

基因组印记调节基因表达不平等地从母系和父系等位基因.
亲属关系理论表明,父母的基因组冲突对资源分配驱动印记的基因进化.
以前对印记基因的研究基本上忽视了交配系统的影响,使亲属理论在很大程度上未经测试.

研究的目的:

研究Brassicaceae印记基因上的选择特征.
在Arabidopsis lyrata中检查与交配系统 (自主性与异性) 相关的印记基因进化.
通过亲属理论预测的印记基因之间的共同进化测试.

主要方法:

在Brassicaceae中进行了家族遗传学分析.
在Arabidopsis lyrata种群基因组方法,比较自婚性和异婚性种群.
在印记的基因上寻找平衡和定向选择的签名.

主要成果:

由内体表达的印记基因显示了Brassicaceae和异性种群的平衡选择,根据交配系统而有所不同.
遗传学分析揭示了印记基因上的负面定向选择.
种群层面的选择信号是独立于交配系统的,并且与亲属关系预测的协议有限.
印记基因之间的共同进化被检测到,但不是在特定的位置.

结论:

亲属关系理论部分解释了印记基因进化,交配系统影响了选择信号.
选择似乎比编码序列更强烈地影响基因表达.
印记基因之间的共同进化表明,超越直接蛋白序列进化的复杂相互作用.

关键词:

共同进化的共同进化精子内膜是精子内膜的组成部分.基因组印记是指基因组的印记.亲属关系理论就是亲属关系理论.配对系统的配对系统.

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