完成一个分子时间树的猿类和子
Jack M Craig1,2,3, Grace L Bamba2,3, Jose Barba-Montoya1,2
1Department of Biology, Temple University, Philadelphia, PA, United States.
Frontiers in bioinformatics
|January 1, 2024
概括
这项研究扩大了灵长类分子时间树,包括所有306种Simiiformes. 基于分子数据的分歧时间比进化分析的推算时间更准确.
科学领域:
- 进化生物学 进化生物学
- 灵长类动物的遗传学
- 分子时间树分子时间树
背景情况:
- 灵长类的Simiiformes (子和猿类) 被广泛研究.
- 目前的Simiiformes分子时间树在TimeTree数据库中缺少306个物种中的38个具有可用的分子数据.
- 准确的分子时间表对于理解灵长类动物进化历史至关重要.
研究的目的:
- 构建Simiiformes最全面的分子时间树,包括所有306种具有可用的分子数据的物种.
- 为了比较从分子数据中获得的分歧时间与在没有分子数据的情况下统计学上归因的时间.
- 评估分子与假定时间树对进化特异性和物种化速率分析的影响.
主要方法:
- 采用了三方面方法:搜索已发表的时间树,使用放松的时钟缩放非定时的族系,并从GenBank遗传数据中重建新的时间树.
- 从15项已发表的研究中检索了21种物种的分离时间.
- 不定时的原始物种被用来添加4个物种,并通过重建10个新的时间树来添加13个物种.
- 汇集了全面的分子时间树,并与数据较少的归算时间进行了比较.
主要成果:
- 这项研究成功地扩大了Simiiformes分子时间树,包括所有306种物种.
- 统计计算的分歧时间与分子衍生时间没有显著的相关性.
- 与分子时间树相比,使用指定的时间树导致了进化特异性和物种化速率的不同趋势.
结论:
- 开发的分子时间树是Simiiformes最全面的.
- 来自分子数据的分歧时间对于准确的进化分析至关重要.
- 这项工作强调了利用现有的分子数据来增强类特定时间树的重要性,并鼓励进一步努力完成全球生命时间树.
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