评估死后损伤和污染对古代DNA赋值性能的影响
Antonio Garrido Marques1, Simone Rubinacci2,3, Anna-Sapfo Malaspinas1,4
1Department of Computational Biology, University of Lausanne, Lausanne, Switzerland.
Scientific reports
|March 15, 2024
概括
这项研究表明,像ATLAS这样的基因型调用器和读取修剪可以提高古代DNA归算的准确性,特别是在高度受损的基因组中. 污染率高于5%显著降低了归算性能.
科学领域:
- 基因组学就是基因组学.
- 古代DNA分析 古代DNA分析
- 生物信息学是一种生物信息学.
背景情况:
- 对于古代DNA (aDNA) 研究来说,低覆盖率的归算变得越来越重要.
- 标准的归算方法可能会受到死后损伤 (PMD) 和aDNA中的污染的影响.
- 评估专门的工具和污染值对于准确的aDNA归算至关重要.
研究的目的:
- 评估PMD和污染对aDNA归算性能的影响.
- 为了比较基因型调用器ATLAS和bcftools用于aDNA归算.
- 为了确定可接受的污染水平,以便在DNA中可靠地归算.
主要方法:
- 利用主要组件分析和归算错误率来评估性能.
- 使用基因型调用器ATLAS与bcftools的归算准确度进行比较.
- 模拟污染通过添加当今的DNA读到古代的基因组.
主要成果:
- 亚特拉斯和读取剪裁显著改善了对高度损坏的基因组 (42%的PMD) 的归算.
- 亚特拉斯为较少受损的古代基因组提供了有限的好处.
- 计量准确性急剧下降,污染水平超过5%.
结论:
- 在将高度受损的基因组归因之前,使用读取修剪或ATLAS等基因型调用器计算PMD.
- 只有当污染水平低于5%时,才能将古代基因组归咎于可靠的结果.
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