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FamLink2 - 一个全面的工具,用于概率计算的血统分析涉及链接的DNA标记,占基因型的不确定性

Daniel Kling¹, Petter Mostad², Andreas Tillmar³

¹Department of Forensic Sciences, Oslo University Hospital, Pb. 4950 Nydalen, Oslo NO-0424, Norway; Department of Forensic Genetics and Forensic Toxicology, National Board of Forensic Medicine, Linköping, Sweden; Biostatistics (BIAS), Norwegian University of Life Sciences, Aas, Norway.

Forensic science international. Genetics

|October 12, 2024

概括

FamLink2软件有效地处理链接的遗传标记和基因型不确定性,用于法医关系推断. 与其他方法相比,它为真实案件提供了优越的信息内容,特别是低质量的DNA数据.

科学领域:

法医遗传学法医遗传学
计算生物学是一种计算生物学.
统计遗传学统计遗传学

背景情况:

越来越多的人对软件的需求在法医应用中分析众多链接的遗传标记.
测序技术的出现产生了密集的SNP数据和低质量的DNA.
需要强大的模型来处理由低质量的序列数据引起的基因型不确定性.

研究的目的:

为了提供一个有效的实施一个通用模型的血统概率计算与链接的遗传标记数据.
在法医遗传学分析中解决基因型不确定性和人口亚结构问题.
验证开发模型的实用性和计算可行性,用于法医应用.

主要方法:

一种三层的方法:种群模型 (等位基频率,亚结构),遗传模型 (链接标记者的IBD) 和观察模型 (从读取和错误中获得的基因型概率).
实现了FamLink2软件的实现.
通过公布的SNP小组和ISFG指南进行验证.

主要成果:

对于高达10,000个标记器的面板,计算是可行的,对于更多的标记器,计算时间的线性增加.
低覆盖度序列数据的概率模型优于基于值的基因型调用.
与其他方法相比,FamLink2在真实案例上进行关系推理的信息含量更高.

结论:

FamLink2共同处理遗传链接,基因型不确定性和人口亚结构,以获得任意血统和标记数据.
该软件对于大型标记面板来说是高效和可扩展的.
序列数据的概率模型对于准确的法医遗传推理至关重要.

关键词:

遗传联系是一种遗传联系.基因型的概率是什么亲属关系的关系覆盖率低,覆盖率低.序列化是指测序的使用.

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