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在鹿小鼠 (Peromyscus maniculatus) 中对缺氧的表观遗传反应的地理变异分布在一个高度梯度上

Dhriti Tandon¹, Shane Campbell-Staton¹, Zachary Cheviron²

¹Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA.

Molecular ecology

|March 29, 2025

概括

低地小鼠在对缺氧的反应中表现出更大的表观遗传变化,这表明它们更依赖分子可塑性来适应低氧环境. 高地小鼠表现出明显的表观遗传模式,反映出它们独特的进化适应慢性缺氧.

科学领域:

* 进化生物学进化生物学
*生理适应生理适应
* 表观遗传学是一种表观遗传学.

背景情况:

* 低地和高地环境中的Peromyscus maniculatus种群表现出明显的生理适应,以适应不同氧气供应.
*在低地祖先中演变的缺氧反应可能会在慢性高海拔缺氧下引起并发症.
*表观遗传修饰,特别是DNA甲基化,为表型可塑性提供了一种机制,以应对环境变化.

研究的目的:

* 调查低地和高地Peromyscus maniculatus种群之间对低氧的表观遗传反应的差异.
* 为了测试低地小鼠对缺氧的表观遗传反应更强,驱动性质的可塑性假设.

主要方法:

*分析低地和高地小鼠在低氧暴露下左心室组织中的DNA甲基化模式.
*表观遗传景观的比较,重点关注像Egln3这样的缺氧相关基因及其调节器Epas1.1.

主要成果:

*低地小鼠在低氧暴露时,与高地小鼠相比,对DNA甲基组进行了更广泛的表观遗传调制.
*在种群之间观察到Egln3基因甲基化的显著差异,野生高地小鼠表现出更高的甲基化.
*这些发现表明,缺氧耐受性具有不同的进化策略,涉及对表观遗传可塑性的差异依赖.

结论:

* 低地Peromyscus maniculatus种群在低氧适应方面使用更动态的表观遗传可塑性.
*高地种群显示出对慢性缺氧耐受性的进化,可能更固定的表观遗传状态的证据.
*这项研究强调了进化史在塑造分子可塑性和适应低氧等环境挑战方面的作用.

关键词:

通过DNA甲基化.缺氧缺氧是指缺氧的情况.塑性的可塑性塑性

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