在多样化的白基因组中,经常发生的横向基因转移
Cong Liu1, Simon Hellemans1, Yukihiro Kinjo1
1Okinawa Institute of Science & Technology Graduate University, 1919-1 Tancha, Onna-son, 904-0495 Okinawa, Japan.
Evolution; international journal of organic evolution
|January 16, 2026
概括
在像白这样的昆虫中,水平基因转移 (HGT) 是显著的,Wolbachia是主要来源. 大多数获得的基因是特定于血统的,通常是非功能性的.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 分子生物学分子生物学
背景情况:
- 横向基因转移 (HGT) 是 prokaryotes 创新的关键驱动力.
- 在真核生物,特别是昆虫中,HGT的作用和范围在很大程度上仍未被探索.
- 甲和 (Blattodea) 由于它们复杂的共生关系,为研究HGT提供了一个独特的模型.
研究的目的:
- 调查白和虫基因组中来自非甲状动物生物的HGT的发生和影响.
- 确定这些昆虫中水平获得的基因的来源和特征.
- 了解HGTs在Blattodea的进化命运和功能意义.
主要方法:
- 对45只白和2只的高质量基因组进行比较基因组学分析.
- 横向转移的基因和伪基因的识别和分类.
- 遗传学分析以确定HGT起源和进化轨迹.
主要成果:
- 确定了281个估计的HGT事件,在168个正统组中贡献了289个基因和2,494个假基因.
- 沃尔巴基亚被确定为主要的HGT来源;白肠道细菌和Blattabacterium显示出最小的贡献.
- 横向获得的基因往往是最近的,特定于物种,容易发生重复和伪基因化,并且比本地基因进化更快.
- 移动遗传元素和遗传信息处理基因经常被转移.
结论:
- 长通过HGT呈现持续的基因获取,大多数事件是谱系特异的.
- 在白和中获得的基因似乎在很大程度上是非功能性的,并倾向于随着时间的推移而消失.
- 在昆虫基因组的进化中,HGT扮演着动态的,尽管往往是短暂的角色.
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