在法医遗传学中为猎枪测序做准备 - - 对DNA提取和图书馆建设方法的评估
Marie-Louise Kampmann1, Claus Børsting1, Alberte Honoré Jepsen1
1Section of Forensic Genetics, Department of Forensic Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Forensic science international. Genetics
|February 5, 2025
概括
优化DNA提取和图书馆准备对于法医遗传学中高质量的猎枪测序至关重要. 将EZ1&2提取与双链图书馆或Chelex/PrepFiler与单链图书馆相结合,最大限度地提高了法医相关的遗传数据.
科学领域:
- 法医遗传学 法医遗传学
- 下一代测序的测序方法
- 分子生物学分子生物学
背景情况:
- 枪支测序为人类识别,表型,祖先和调查家谱提供了全面的遗传分析.
- 评估DNA提取和图书馆准备方法对于优化法医中猎枪测序性能至关重要.
研究的目的:
- 评估四种DNA提取方法与三种用于猎枪测序的图书馆准备方法的性能.
- 从各种样本类型中确定最佳组合,以最大限度地提高法医相关遗传数据的质量和数量.
主要方法:
- 在法医参考样本 (全血,FTA卡打孔) 上使用Illumina NovaSeq 6000进行了枪支测序.
- 用四种常见的法医方法提取DNA,并使用三个不同的图书馆建设协议进行处理.
- 数据分析的重点是STRs,AIMs,HIrisPlex-S SNP,Y-SNP和FIGG SNP的覆盖范围,读数,映射读数,插入大小和基因型.
主要成果:
- 具有双链库准备的EZ1&2DNA调查器套件产生了最高质量的数据和大多数基因型 (36个STR,162个AIM,41个HIrisPlex-SSNP,85712个Y-SNP,1.3M个FIGGSNP).
- Chelex®或PrepFiler ExpressTM法医DNA提取与单链库准备相结合也产生了高质量的结果.
- 单链协议对全血无效,但对使用EZ1&2提取的FTA卡DNA有效;使用双链库的Chelex®/PrepFilerTM产生了糟糕的结果.
结论:
- 选择DNA提取方法显著影响法医应用中的猎枪测序结果.
- 提取和库准备协议的特定组合对于优化数据数量和质量至关重要.
- 这项研究为选择最佳工作流程提供了指导,以最大限度地提高猎枪测序在法医调查中的实用性.
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