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在Allium (Amayllidaceae) 中不完整的血统分类和基因流动

ZengZhu Zhang¹, Gang Liu¹, Minjie Li¹

¹State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, People's Republic of China.

Molecular phylogenetics and evolution

|March 12, 2024

概括

在Allium属中进行的遗传学研究显示,尽管基因树有不一致性,但它仍然是一个强大的物种树. 不完整的谱系分类 (ILS) 和基因流动是Allium进化异质性的关键驱动因素.

科学领域:

基因组学就是基因组学.
人类遗传学是一个学科.
进化生物学进化生物学

背景情况:

属对遗传学重建提出了重大挑战,原因是广泛的拓不一致性和不确定性.
之前的研究利用了各种数据,但未能为Allium建立一致的系谱.

研究的目的:

通过评估不完整的血统排序 (ILS),基因流动和基因树估计错误的作用,解决Allium属的遗传学矛盾.
为了重建一个可靠的家族遗传骨干Allium物种.

主要方法:

从38个Allium物种在10个亚属中生成了75个转录组.
通过整体塑基因组,单拷贝基因和共识编码序列 (CDS) 通过凝聚和连接方法估计的家族遗传树.
采用多种分析方法,包括凝聚模拟和网状网络推断,以量化ILS,基因流和基因树估计错误.

主要成果:

为Allium建立了一个完全支持的物种树,证实了单性,并同意已建立的关系.
检测到大量的ILS,以及两个古老的杂交事件和几个内进事件的证据.
回归分析确定了基因树推断错误和基因流动作为驱动基因树变异的主要因素.

结论:

不完整的血统分类 (ILS) 和基因流动是Allium的基因异质的主要原因.
该研究为Allium提供了一个完善的基因组学框架,展示了解开基因组学信号异质性的方法.
基因流和ILS显著影响了Allium属的进化历史重建.

关键词:

(Allium) 是一种.杂交方式的混合化.在 ILS ILS ILS 人类基因组学是什么?拓学上的不一致性

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