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河流排水重组和网状物进化在双线沙兰 (Eurycea bislineata) 复杂物种

Todd W Pierson¹, Kenneth H Kozak², Travis C Glenn³

¹Department of Ecology, Evolution, and Organismal Biology, Kennesaw State University, Kennesaw, GA 30144, USA.

Systematic biology

|October 25, 2023

概括

网状动物的进化,而不是一个简单的树,解释了两条线的鱼物种复杂的复杂历史. 河流排水变化导致了基因流和杂交,挑战了传统的分类学.

科学领域:

进化生物学进化生物学
遗传学是一个遗传学.
两动物系统学

背景情况:

生物地理障碍和二次接触驱动复杂的进化历史.
双线 (Eurycea bislineata) 种群复合体由于数据矛盾而构成分类学上的挑战.
之前的线粒体DNA (mtDNA) 研究表明了代言性,但无法评估基因流动.

研究的目的:

为了研究Eurycea bislineata物种复杂的网状进化史.
用多个位置的遗传数据来解决分类学差异.
了解古排水重组在塑造鱼进化中的作用.

主要方法:

在100多个个体中生成了三重酶限制部位相关的DNA测序 (3RAD) 数据.
分析数据使用补充的家族遗传和人口遗传方法.
结果与之前的线粒体DNA (mtDNA) 分析进行了比较.

主要成果:

以前的数据集中的不一致性是由一个网状的进化历史解释的.
有证据表明,基因流动和基因系之间的内进是显著的.
河流排水重组显著影响了鱼种群结构和基因流动.

结论:

欧瑞西亚线虫复合体的进化历史是有网状的,而不是严格分开的.
对于具有复杂基因流动的群体,传统的遗传学方法是不够的.
系统学应该包括非等级的进化过程,如杂交和内进化.

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