从线粒体基因组推断的Odonata的遗传学关系和分歧时间
Weidong Huang1, Tianyou Zhao1, Mingyuan Fan1
1Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management College of Plant Protection, China Agricultural University, Beijing, China.
iScience
|March 3, 2025
概括
龙 (Odonata) 起源于罗纪,主要的血统辐射在白纪. 线粒基因组澄清了较低级别的差异,但与较高级别的Odonata分类斗争.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 古生物学的古生物学
背景情况:
- (龙和) 是最早的有翅膀的昆虫之一,为昆虫进化提供了洞察力.
- 了解它们的进化历史是理解昆虫飞行发展的关键.
研究的目的:
- 用全面的基因组和化石数据重建奥多纳塔的进化历史和起源.
- 评估线粒基因组在Odonata内部的不同分类层面上对分类基因解析的有用性.
- 为了研究差异时间估计中的线粒核异调.
主要方法:
- 汇集了迄今为止Odonata最大的线粒基因组数据集 (143个线粒基因组,53个新测序).
- 进行了包含11个化石记录的遗传学分析,以估计分歧时间.
- 利用各种化石校准策略来分析线粒核异调.
主要成果:
- 线粒基因组有效地解决了Odonata内部的较低级别差异,但不足以用于更高级别的分类 (子序列,超级家族).
- 奥多纳塔起源于罗纪,在白纪时期出现了显著的多样化.
- 在线粒体和核数据之间观察到差异时间估计的实质差异,特别是在较旧的化石校准中.
结论:
- 这项研究为Odonata提供了一个强大的遗传学框架,突出了罗纪起源和白纪辐射.
- 线粒基因组数据对于奥多纳塔的详细进化研究是有价值的,但更高层次的关系需要综合方法.
- 线粒核异调是Odonata分歧时间估计的一个重要因素,需要仔细校准.
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