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广泛的家族基因学不一致性和新热带猫属Leopardus的复杂进化历史
Jonas Lescroart1,2, Alejandra Bonilla-Sánchez2,3, Constanza Napolitano4,5,6,7
1Department of Biology, University of Antwerp, Antwerp, Belgium.
Molecular biology and evolution
|November 21, 2023
概括
基因组数据揭示了对小野猫 () 进化,挑战物种关系和发现基因流动的新见解. 这项研究阐明了这个多样化的群体的进化历史和遗传多样性.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 动物学 动物学
背景情况:
- 新热带小猫属Leopardus内的进化关系尚未完全解决.
- 以前的遗传学研究已经产生了有争议的结果,需要进一步调查.
研究的目的:
- 通过使用全基因组数据,构建 Leopardus 的时间校准的基因组.
- 为了调查家族基因学不一致性,物种间的内进,以及遗传多样性和人口史的模式.
- 首次提供安第斯猫 (Leopardus jacobita) 的全基因组数据.
主要方法:
- 对多个Leopardus物种进行全基因组再测序.
- 遗传学分析以推断进化关系和分歧时间.
- 使用基因组数据分析基因流和人口历史.
主要成果:
- 类辐射始于早期普略纪,在早期普纪期间,在Oncifelis亚属中发生了第二次爆发.
- 马尔盖 (L. wiedii) 与安第斯猫 (L. jacobita) 相比,与鱼 (L. pardalis) 更为密切相关.
- 在鱼和祖先Oncifelis之间,以及杰弗洛伊猫 (L. geoffroyi) 和南方老虎猫 (L. guttulus) 之间检测到显著的基因流动.
- 基因组多样性差异很大,在安第斯猫和猫之间的异构性差异是十倍的.
结论:
- 遗传学不一致主要是由于不完整的血统分类,由基因流动加剧.
- 这项研究完善了对的物种化事件和多样性模式的理解.
- 接受异质基因组信号对于强大的基因组推断至关重要.
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