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基因组学支持同类动物的陆地性单一起源
1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SA, UK.
Proceedings. Biological sciences
|October 29, 2024
概括
陆地同类动物,像木一样,在陆地上多次进化生命. 新的分子数据证实了它们的单性,并表明同类动物的陆地性源于Permo-Carboniferous.
科学领域:
- 进化生物学是进化的生物学.
- 分子遗传学分子遗传学
- 甲动物生物学 甲动物生物学
背景情况:
- 陆地性是一种主要的进化过渡,在节肢动物中独立地进化了多次.
- 异类 (Isopoda) 是一种多样化的甲类,包括许多陆地物种 (Oniscidea),但它们的进化历史仍有争议.
- 以前的分子研究表明,陆地同类动物的非单一性,这意味着多次陆地过渡.
研究的目的:
- 使用全面的基因组数据重建异种类的进化关系和分歧时间.
- 测试陆地同类脚动物 (Oniscidea) 的单属,并调查它们在陆地适应的起源.
- 在以前的同类动物研究中解决冲突的基因信号.
主要方法:
- 编译了36种同类动物和4种 peracarid 种类的基因组和转录组数据.
- 产生了de novo组件,并利用了970个单复制的正统基因进行遗传学分析.
- 应用分子测年技术来估计分离时间.
主要成果:
- 遗传学分析支持陆地同类动物的单一性.
- 使用核糖体RNA基因的先前研究中的冲突关系归因于长分支吸引力.
- 分子约会表明,同类动物的陆地性起源于珀莫 - 碳化时期.
结论:
- 陆地同类动物代表着一个单一的进化过渡,在同类动物中登陆.
- 与其他陆地关节动物相比,同类动物的陆地性起源是相对较新的.
- 综合的基因组数据对于解决复杂的遗传学关系和进化史至关重要.
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