双胞胎骨块是一个文物吗?
Ana Serra Silva1, Paschalis Natsidis1, Laura Piovani1
1Centre for Life's Origins and Evolution, Department of Genetics, Evolution, and Environment, University College London, Gower Street, London WC1E 6BT, UK.
Current biology : CB
|July 12, 2025
概括
这项研究挑战了已建立的Deuterostomia类,揭示了它的单只在容易发生系统错误的条件下得到支持. 缓解这些错误显著削弱或消除对Deuterostomia的支持,质疑其进化历史.
科学领域:
- 进化生物学 进化生物学
- 人类遗传学 是一个学科.
- 动物王国动物王国
背景情况:
- 分类Deuterostomia,包括Chordata,Echinodermata和Hemichordata,是动物类学中长期存在的共识.
- 最近的遗传学分析已经对Deuterostomia的单一性产生了怀疑,因为短枝长可能表明系统性错误.
研究的目的:
- 调查系统错误的潜在来源,影响Deuterostomia的遗传学分析.
- 重新评估Deuterostomia的单,通过采用一个点对点的方法,并减轻已知的错误来源.
主要方法:
- 采用了点对点的遗传学分析方法.
- 模拟条件促进长枝吸引力 (LBA),如分枝长度异质性和氨基酸组成约束.
- 实施的方法,以减轻在遗传学推断中的潜在系统错误.
主要成果:
- 在促进长枝吸引力 (LBA) 的条件下,Deuterostome单基被强烈支持.
- 缓解LBA促进因素导致对Deuterostomia的支持明显减少或消失.
- 这些发现表明,以前对Deuterostomia的支持可能是系统错误的工件.
结论:
- 当系统性错误被考虑时,Deuterostomia的单,动物类学的一个基石,是可疑的.
- 一个非常短暂或不存在的双胞胎体分支对解释早期动物进化,包括化石记录和双胞胎祖先的性质有重大影响.
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