方向性表观症在形态分歧中很常见.
Salomé Bourg1, Geir H Bolstad2, Donald V Griffin3
1Department of Biology, Centre for Biodiversity Dynamics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
Evolution; international journal of organic evolution
|February 23, 2024
概括
方向性表观症是常见的,并显著影响进化动态. 这项研究揭示了它往往限制了进化能力,特别是在动物中更大的尺寸.
科学领域:
- 进化生物学是进化的生物学.
- 遗传学 遗传学 是一个
背景情况:
- 在进化中,表观性,即基因之间的相互作用,通常被认为是次要的.
- 然而,系统的定向表观症可以通过改变基因效应和可进化性来显著影响进化轨迹.
研究的目的:
- 实证地评估跨多种特征和物种的定向表征的流行率和规模.
- 研究方向性表观如何影响进化过程中的附加性遗传变异 (可进化性).
主要方法:
- 开发一种新的框架来估计从跨线实验的系统性表观模式.
- 对24种动物和17种植物的197种与大小相关的特征的表观性影响的量化.
主要成果:
- 定向性表观症在广泛的特征和物种中普遍存在.
- 定向表观症的强度随着种群之间的形态分歧增加而增加.
- 在动物中,与大小相关的特征观察到一种常见的负方向性模式,这表明对更大尺寸的进化能力存在限制.
结论:
- 方向性表观在塑造进化动态方面发挥着重要作用,并且可以对特征进化施加约束.
- 这些发现挑战了表观论不重要的概念,并突出了它在理解进化过程中的重要性.
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