出海:海流和不对称基因流的模式在一个潮间鱼类物种

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Anthony A Snead¹, Andrey Tatarenkov², John C Avise²

¹Department of Biological Sciences, University of Alabama, Tuscaloosa, AL, United States.

Frontiers in genetics

|July 17, 2023

概括

海洋电流塑造了红树林河鱼的基因流动,在佛罗里达群岛的基因变异热点中产生了基因变异热点,这些热点作为基因沉. 这种不对称性影响了超人口结构和进化潜力.

科学领域:

进化生物学进化生物学
海洋生态海洋生态学
人口遗传学人口遗传学

背景情况:

被动分散影响遗传变异和进化能力.
红树林河流鱼居住在碎片化的潮间红树林中,充当生物岛屿.
了解基因流动对于在碎片化息地保护至关重要.

研究的目的:

为了研究整个范围内的红树林河鱼 (Kryptolebias marmoratus) 的种群遗传结构.
确定海洋流和距离在推动基因流和遗传差异化中的作用.
识别定向迁移的模式及其对人口结构的影响.

主要方法:

在17个种群的32个微卫星位点对1000多个个体的基因定型.
采用五种互补的方法来评估范围广泛的人口遗传结构.
整合基因数据与生物物理建模,使用10年的海洋流数据.

主要成果:

确定了八个不同的种群群集,在多个尺度上具有显著的遗传结构.
海洋电流和人口之间的水域距离是大规模基因流动的关键驱动因素.
佛罗里达群岛群落作为遗传沉,接收但不输出移民,从而积累遗传变异.

结论:

不对称的海流显著影响rivulus.的遗传差异化和定向迁移率.
复杂的基因流和超人口结构模式是由海洋和地理因素驱动的.
遗传变异分布受到海洋流的固有不对称的影响,影响进化潜力.

关键词:

克里普托莱比亚斯 (Kryptolebias marmoratus) 是一个烂的生物.拉格兰吉安 (拉格兰吉安包裹跟踪)生物物理建模模型基因流是指基因的流动.红树林森林是红树林的森林.海流是目前的海洋流.人口结构人口结构.

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