对全基因组的基因组冲突的表征揭示了食肉真菌的进化模式
Weiwei Zhang1,2,3, Yani Fan2,3, Wei Deng1
1State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology, and Department of Microbiology, College of Life Science, Nankai University, Tianjin, China.
mBio
|August 29, 2024
概括
肉食性线虫捕菌 (NTF) 由于复杂的进化机制,在大规模灭绝后迅速多样化. 不完整的谱系排序和基因流动推动了这些多样化的真菌谱系的辐射.
科学领域:
- 菌类学 菌类学是指菌类学.
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 大量灭绝可以在幸存的血统中引发快速的进化辐射.
- 线虫捕捉真菌 (NTF) 在阿斯科米科塔的多样化与二叠纪-三叠纪灭绝有关,但驱动因素尚未完全理解.
研究的目的:
- 为了研究驱动三种不同的NTF血统的快速辐射的进化机制.
- 重建遗传学关系并确定有助于NTF多样性的进化过程.
主要方法:
- 对23个基因组的家族基因组分析,包括三个NTF血统 (Drechslerella,Arthrobotrys,Dactylellina) 和一个外组.
- 使用2,944个单复制的正基因重建物种树.
- 评估全基因组的遗传学不一致性和积极选择的证据.
主要成果:
- 德雷克斯莱雷拉系早于阿特罗波特里斯和达克提莱莱纳系出现.
- 观察到显著的遗传学不一致性,主要归因于不完整的血统分类 (ILS).
- 内进和横向基因转移也导致了家族遗传不一致.
- 参与细胞生长和陷形态发生的基因显示出积极选择的迹象.
结论:
- 多种进化机制,包括ILS和非垂直基因转移,促进了NTFs的快速辐射.
- 这些发现揭示了在灭绝后的真菌多样化和适应的复杂进化动态.
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