摘要
目的通过检测常染色体以及Y染色体二等位基因标记,探讨Y-STR基因座突变情形下的同胞兄弟鉴定策略。方法对被鉴定的两名男性个体,采用Goldeneye 20A试剂盒和18NC试剂盒检验35个常染色体STR基因座,采用PowerPlex誖Y试剂盒和Yfiler试剂盒检验Y染色体上16个STR基因座,根据ITO法计算全同胞指数,采用片段长度差异等位基因特异性PCR或普通PCR法对20个Y染色体二等位基因标记进行分型检测。结果 35个常染色体STR基因座的累积全同胞指数为4.3149×106,两名被鉴定人16个Y-STR基因座有2个发生突变,20个Y染色体二等位基因标记分型结果均相同,支持两个体为全同胞兄弟关系。结论对于发生Y-STR突变的父系鉴定案例,可补充检验Y染色体SNP和InDel等二等位基因遗传标记。
Objective To explore the methods for identification of sibling brothers with Y-STR locus muta- tion by detection of genetic markers on autosome and Y-biallelic. Methods Goldeneye 20A and 18NC kit were used to genotyped the 35 STRs on autosome from two men. PowerPlex Y kit and Yfiler kit were used to genotyped the 16 STRs on Y chromosome full sibling index was calculated by ITO method. Twenty Y-biallelic markers were genotyped by fragment length discrepant allele specific PCR or general PCR. Results Relationship of sibling brothers was found to have mutation of 2 loci on 16 Y-STR and the identical genetype of 20 Y-biallelic markers as well as a cumulative full sibling index of 4.3149×106 from 35 STRs on autosome. Conclusion In identification of paternal linage of Y-STR mutation, more genetic information can be acquired by detection of Y-biallelic markers including SNP and InDel .
出处
《法医学杂志》
CAS
CSCD
2012年第3期190-194,共5页
Journal of Forensic Medicine
