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两个密切相关的无水生菌的种群基因组学揭示了适应极端干燥的差异

Nurislam M Shaikhutdinov¹, Galya V Klink², Sofya K Garushyants²

¹Regulatory Genomics Research Center, Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia.

Genome biology and evolution

|September 14, 2023

概括

睡眠Polypedilum pembai最近对极度干燥的快速适应,由基因重复和保护性蛋白-L-异酸O-甲基转移酶 (PIMTs) 的积极选择证明. 这种适应使其能够通过多个干燥和再水周期生存.

科学领域:

* 进化生物学进化生物学
* 分子遗传学分子遗传学
* 环境适应环境适应

背景情况:

* 睡觉的体动物Polypedilum vanderplanki表现出无水生态,通过保护基因在极端干燥中存活.
* 蛋白质-L-异酸盐 (D-酸盐) O-甲基转移酶 (PIMTs) 是参与这种干燥耐受性的关键基因家族.
* 一种相关的物种,Polypedilum pembai,表现出增强的无水生态,能够在多个干燥-再水化周期中存活下来.

研究的目的:

* 为了研究Polypedilum物种中无水生病的进化机制.
* 为了比较P. vanderplanki和P. pembai. 的干燥耐受性的遗传结构.
* 为了确定导致P. pembai. 生存率提高的遗传变化.

主要方法:

* Polypedilum pembai. 的基因组测序和组装.
* 在P. pembai和P. vanderplanki之间进行了比较基因组学分析.
*对P. vanderplanki和P. pembai种群的种群基因组学分析.

主要成果:

* 在两种物种之间的PIMT位点显著的阳性选择和改变的遗传结构.
*P. pembai中PIMT-4的基因放大,其中6个副本呈现出不同的表达特征.
*在P. pembai的PIMT区域减少了核酸多样性,表明与复制后适应相关的选择性扫除.

结论:

* Polypedilum中无水生菌的适应是最近的,快速的和正在进行的.
* 基因重复和PIMT的新功能化对于增强干燥耐受性至关重要.
*P. pembai代表了研究快速进化适应环境压力的模型.

关键词:

在P. pembaibai的故事里.潘·范德尔普兰基 (P. vanderplanki) 是一个适应性进化是适应性的进化.无水生生物体的无水生生物体一个模拟模拟器.选择性的扫除选择性的扫除

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