Objective:To investigate 38 Y-chromosome short tandem repeat(Y-STR)genetic polymorphisms in Beijing Han and analyze the genetic distance with neighboring or linguistically similar populations.Materials and Methods:In ...Objective:To investigate 38 Y-chromosome short tandem repeat(Y-STR)genetic polymorphisms in Beijing Han and analyze the genetic distance with neighboring or linguistically similar populations.Materials and Methods:In the study,we selected 531 unrelated male individuals of Beijing Han,and the results were statistically analyzed by testing with GSTAR™41Y reagents.Results:The allele peak heights were balanced among the Y loci,the amplified fragment ranged from 100 to 500 bps.A total of 531 haplotypes were detected in 531 samples.Eight null genotypes were observed on locus DYS448.One and three double alleles were observed on single-copy locus DYS576 and DYS19,respectively.DYS385 a/b,DYF387S1 a/b,and DYS527 a/b were more common in double copies,but 3,13,and 11 triple alleles were detected,respectively.The gene diversity values of Y-STRs except DYS391,DYS438,and DYS645 were>0.5.Twenty-seven Y-STRs of Beijing Han population were selected for genetic distance comparison with 17 populations including Changchun Han,with Rst values ranging from 0.0002 to 0.1703.Conclusion:The 38 Y-STRs in this study have strong male lineage identification ability and have great potential for individual identification,kinship identification,Y-STR database construction,and genetic relationship research.展开更多
Short tandem repeats （STRs） are short tandemly repeated DNA sequences that involve a repetitive unit of 1-6 bp. Because of their polymorphisms and high mutation rates, STRs are widely used in biological research. St...Short tandem repeats （STRs） are short tandemly repeated DNA sequences that involve a repetitive unit of 1-6 bp. Because of their polymorphisms and high mutation rates, STRs are widely used in biological research. Strand-slippage replication is the predominant mutation mechanism of STRs, and the stepwise mutation model is regarded as the main mutation model. STR mutation rates can be influenced by many factors. Moreover, some trinucleotide repeats are associated with human neurodegenerative diseases. In order to deepen our knowledge of these diseases and broaden STR application, it is essential to understand the STR mutation process in detail. In this review, we focus on the current known information about STR mutation.展开更多
对亲子鉴定常用的ABI公司Indentifiler荧光标记复合扩增试剂盒中的15个短串联重复序列及D14S306、D16S3391、D5S2500、D12S391、D13S796、D1S518位点的突变现象进行研究.在1013例认定亲子关系案例中,对发现有一个基因位点发生突变的案...对亲子鉴定常用的ABI公司Indentifiler荧光标记复合扩增试剂盒中的15个短串联重复序列及D14S306、D16S3391、D5S2500、D12S391、D13S796、D1S518位点的突变现象进行研究.在1013例认定亲子关系案例中,对发现有一个基因位点发生突变的案例增加8个常染色体STR(short tandem repeat)基因座检测,使其父权相对机会(RCP)大于99.999%以上,并对突变位点进行测序.在1013例认定亲子关系案例中,发现11例有一个基因位点发生突变,8次突变事件为父源性突变,突变位点包括vWA、FGA、D14S306、D13S317、D21S11、CSFIPO、D16S3391;其余3例突变来源不明,包括FGA、D13S796、D3S1358.以vWA和FGA的突变率最高,为0.15%,平均突变率为(0.09±0.370×10-3)%.本鉴定所常用的21个基因座,突变率低,具有较高的推广价值.展开更多
亲子鉴定中常会发生STR(short tandem repeats,短串联重复)突变的情况。突变对亲子关系的判定会造成困扰。对STR突变规律和亲子鉴定中所遇到的STR突变问题、突变的判定、突变下非父排除率和父权指数的计算以及需与突变区分的情形等问题...亲子鉴定中常会发生STR(short tandem repeats,短串联重复)突变的情况。突变对亲子关系的判定会造成困扰。对STR突变规律和亲子鉴定中所遇到的STR突变问题、突变的判定、突变下非父排除率和父权指数的计算以及需与突变区分的情形等问题进行综述和讨论。展开更多
目的观察Sinofiler系统15个短串联重复序列(short tandem repeat,STR)基因座的突变现象和特点。方法选择Sinofiler试剂盒检测的案件8261例,筛选该试剂盒15个STR基因座的突变事件,判断突变等位基因的来源,统计各基因座的突变率,分析突变...目的观察Sinofiler系统15个短串联重复序列(short tandem repeat,STR)基因座的突变现象和特点。方法选择Sinofiler试剂盒检测的案件8261例,筛选该试剂盒15个STR基因座的突变事件,判断突变等位基因的来源,统计各基因座的突变率,分析突变的特点。结果在15个基因座上发现175个突变事件,167例(95.43%)为一步突变,5例(2.86%)为二步突变,2例(1.14%)为三步突变,1例(0.57%)为五步突变。平均突变率为1.30×10^(-3)(95%CI 1.12×10^(-3)~1.51×10^(-3)),各基因座的突变率介于0.45×10^(-3)~2.56×10^(-3)。父、母来源突变比例为13.33∶1。增加重复单位和减少重复单位的突变事件比值为1.10∶1。15个基因座的突变率与杂合度之间没有统计学上的相关性。结论获得的15个STR基因座突变资料在亲子鉴定中有重要的应用价值。展开更多
基金supported by opening research grants from Shanghai Key Lab of Forensic Medicine,Key Lab of Forensic Science,Ministry of Justice,PR.China(Academy of Forensic Science)(No.KF202111)supported by the Fundamental Research Funds for the Central Universities.
文摘Objective:To investigate 38 Y-chromosome short tandem repeat(Y-STR)genetic polymorphisms in Beijing Han and analyze the genetic distance with neighboring or linguistically similar populations.Materials and Methods:In the study,we selected 531 unrelated male individuals of Beijing Han,and the results were statistically analyzed by testing with GSTAR™41Y reagents.Results:The allele peak heights were balanced among the Y loci,the amplified fragment ranged from 100 to 500 bps.A total of 531 haplotypes were detected in 531 samples.Eight null genotypes were observed on locus DYS448.One and three double alleles were observed on single-copy locus DYS576 and DYS19,respectively.DYS385 a/b,DYF387S1 a/b,and DYS527 a/b were more common in double copies,but 3,13,and 11 triple alleles were detected,respectively.The gene diversity values of Y-STRs except DYS391,DYS438,and DYS645 were>0.5.Twenty-seven Y-STRs of Beijing Han population were selected for genetic distance comparison with 17 populations including Changchun Han,with Rst values ranging from 0.0002 to 0.1703.Conclusion:The 38 Y-STRs in this study have strong male lineage identification ability and have great potential for individual identification,kinship identification,Y-STR database construction,and genetic relationship research.
文摘Short tandem repeats （STRs） are short tandemly repeated DNA sequences that involve a repetitive unit of 1-6 bp. Because of their polymorphisms and high mutation rates, STRs are widely used in biological research. Strand-slippage replication is the predominant mutation mechanism of STRs, and the stepwise mutation model is regarded as the main mutation model. STR mutation rates can be influenced by many factors. Moreover, some trinucleotide repeats are associated with human neurodegenerative diseases. In order to deepen our knowledge of these diseases and broaden STR application, it is essential to understand the STR mutation process in detail. In this review, we focus on the current known information about STR mutation.
文摘对亲子鉴定常用的ABI公司Indentifiler荧光标记复合扩增试剂盒中的15个短串联重复序列及D14S306、D16S3391、D5S2500、D12S391、D13S796、D1S518位点的突变现象进行研究.在1013例认定亲子关系案例中,对发现有一个基因位点发生突变的案例增加8个常染色体STR(short tandem repeat)基因座检测,使其父权相对机会(RCP)大于99.999%以上,并对突变位点进行测序.在1013例认定亲子关系案例中,发现11例有一个基因位点发生突变,8次突变事件为父源性突变,突变位点包括vWA、FGA、D14S306、D13S317、D21S11、CSFIPO、D16S3391;其余3例突变来源不明,包括FGA、D13S796、D3S1358.以vWA和FGA的突变率最高,为0.15%,平均突变率为(0.09±0.370×10-3)%.本鉴定所常用的21个基因座,突变率低,具有较高的推广价值.
文摘目的观察Sinofiler系统15个短串联重复序列(short tandem repeat,STR)基因座的突变现象和特点。方法选择Sinofiler试剂盒检测的案件8261例,筛选该试剂盒15个STR基因座的突变事件,判断突变等位基因的来源,统计各基因座的突变率,分析突变的特点。结果在15个基因座上发现175个突变事件,167例(95.43%)为一步突变,5例(2.86%)为二步突变,2例(1.14%)为三步突变,1例(0.57%)为五步突变。平均突变率为1.30×10^(-3)(95%CI 1.12×10^(-3)~1.51×10^(-3)),各基因座的突变率介于0.45×10^(-3)~2.56×10^(-3)。父、母来源突变比例为13.33∶1。增加重复单位和减少重复单位的突变事件比值为1.10∶1。15个基因座的突变率与杂合度之间没有统计学上的相关性。结论获得的15个STR基因座突变资料在亲子鉴定中有重要的应用价值。
