基因组大小和重复元素的进化动态在Ensifera (Insecta: Orthoptera) 中
Hao Yuan1, Xiao-Jing Liu2, Xuan-Zeng Liu2
1School of Basic Medical Sciences, Xi'an Medical University, Xi'an, China.
BMC genomics
|November 5, 2024
概括
在Ensifera昆虫中,基因组大小和重复元素 (RE) 丰度大大不同. 在Tettigonioidea和Grylloidea的不同进化路径解释了这些基因组大小变化.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 昆虫学 昆虫学是一门学科.
背景情况:
- 识别基因组大小变异及其原因在进化生物学中至关重要.
- 重复元素 (RE) 是基因组大小变化的关键驱动因素,但它们的进化含义尚未完全理解.
研究的目的:
- 为了量化Ensifera昆虫的基因组大小变异.
- 为了研究重复元素和基因组大小之间的相关性.
- 了解基因组大小和Ensifera中的RE的进化动态.
主要方法:
- 从中国收集了35种Ensifera昆虫物种 (和).
- 通过流细胞计测量确定基因组大小.
- 在Illumina短读上使用RepeatExplorer2管道分析重复序列.
主要成果:
- 基因组大小变化超过18倍 (1.0018.34 pg),RE丰度从13.66%到61.16%不等.
- 与格里洛伊代相比,Tettigonioidea的基因组更大,具有更多的RE.
- 包括可转移元素 (TE),LTR和LINE在内的RE丰度与基因组大小有很强的相关性,并观察到一个拐点.
结论:
- 在Ensifera中存在广泛的基因组大小和RE丰度变异.
- 在Tettigonioidea和Grylloidea之间观察到RE扩张的独特进化模式.
- 这项研究通过基因组大小和RE动态提供了对Ensifera进化历史的见解.
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