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在强烈的基因流动中,逆转主导了欧洲鱼 (Sardina pilchardus) 的进化

Stephen J Sabatino^1,2, M Pilar Cabezas^3,4, Paulo Pereira^1,2

¹CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal.

Molecular ecology

|July 25, 2025

概括

大规模的基因组逆转显著影响欧洲沙丁鱼的适应性和种群结构. 这些逆转与各种海洋环境中的生命历史特征和局部适应相关.

科学领域:

基因组学就是基因组学.
进化生物学进化生物学
人口遗传学人口遗传学

背景情况:

众所周知,逆转会影响适应性,但它们对物种的全基因组影响尚不清楚.
欧洲沙丁鱼 (Sardina pilchardus) 是一种具有独特的大西洋和地中海种群的重新选择的物种.

研究的目的:

调查反转在种群基因组学和鱼pilchardus的适应中的作用.
了解逆转如何塑造高基因流量的物种中的遗传多样性和种群结构.

主要方法:

采用了全基因组测序和人口模型.
在34个种群中分析了数百万个单核酸多态 (SNP).
基因组扫描确定了与大反转相关的异常区域.

主要成果:

鉴定出了几种大型逆转 (29-52 Mbp),它们总共覆盖了超过一半的基因组.
逆转显示大西洋和地中海种群之间的等位基频率有显著差异,与生命史特征相关.
逆转频率在地理上有所不同,与环境因素保持一致,并减少相邻种群之间的基因流动.

结论:

大规模的反转正在选择中,在塑造萨丁鱼 (Sardina pilchardus) 的全基因组遗传多样性和种群结构方面发挥着至关重要的作用.
这些发现凸显了逆向驱动局部适应的能力,尽管基因流量广泛存在.
该研究提供了关于在气候变化下管理和保护这一商业重要鱼类种群的见解.

关键词:

适应适应适应适应气候变化气候变化气候变化生命史进化生命史进化人口遗传学经验性遗传学野生动物管理野生动物管理

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