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"漂流"的Buchnera基因组跟踪它们虫宿主的微观进化轨迹

Joshua A Thia¹, Dongwu Zhan^1,2, Katie Robinson^1,3

¹School of BioSciences, The University of Melbourne, Melbourne, Victoria, Australia.

Insect molecular biology

|July 20, 2024

概括

微进化基因组研究显示,布赫内拉细菌和桃虫有着共同的进化历史. 中性过程可能驱使它们在虫克隆中的共同进化漂移.

科学领域:

微生物生态学微生物生态学
进化生物学进化生物学
基因组学就是基因组学.

背景情况:

布赫内拉-虫共生通常在宏观进化尺度上进行研究.
跨物种研究提供了对塑造遗传变异的生态进化过程的见解.
桃虫 (Myzus persicae) 是一种全球侵袭性的多虫害虫.

研究的目的:

为了研究微观进化的Buchnera-aphid宿主进化在Myzus persicae.
为了检查虫克隆内部和之间的基因组共变和突变模式.
了解在这种共生中维持多态的生态进化动态.

主要方法:

全基因组测序 43 个同属雌性菌株的 Myzus persicae 和他们的 Buchnera.
虫宿主与它们的内生共生体之间的基因组共变的分析.
在Buchnera基因组中评估突变分布 (同义和非同义).

主要成果:

在单个虫菌株内检测到布克内拉多态.
布赫内拉样本之间的遗传距离与它们的虫宿主之间的遗传距离相关.
根据植物宿主或地理位置,没有观察到基因变异的分离.
在Buchnera中同名和非同名突变表现出类似的模式.

结论:

布克内拉和Myzus persicae在微观进化层面上表现出共同的进化历史.
中立的进化过程,或者说遗传漂移,很可能决定了M. persicae.中的Buchnera进化.
这项研究为虫-内生生体基因组共变提供了新的微观进化观点.

关键词:

这种植物是Myzus persicae.生态进化动态的生态进化动态它们是内共生态生物.人口基因组学人口基因组学

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