陕西省汉族人群11号染色体10个STR基因座的遗传多态性研究

Analysis of genetic polymorphisms of 10 STR loci on chromosome 11 in a Shaanxi Han population

为了分析陕西汉族人群中11号染色体上10个短串联重复序列(short tandem repeat,STR)基因座的多态性,采用荧光标记基因扫描方法,对11号染色体上的D11S1760、D11S4102、D11S4116、D11S4207、D11S4162、D11S914、D11S4127、D11S917、D11S4146和D11S915基因座的遗传多态性进行分析。结果显示:D11S1760、D11S4102、D11S4116、D11S4207、D11S4162、D11S914、D11S4127、D11S917、D11S4146和D11S915基因座分别检出17、11、15、11、4、6、7、12、11和13个等位基因,41、18、36、30、8、10、16、30、29和32个基因型,等位基因型符合Hardy-Weinberg平衡(P>0.05)。其杂合度分别为86.72%、67.95%、83.90%、85.96%、58.18%、57.63%、72.60%、72.73%、77.87%和86.40%,表明11号染色体上的这10个STR基因座在汉族人群中有较好的多态性,是理想的遗传标记物。

DllS1760, DllS4102, DllS4116, DllS4207, DllS4162, DllS914, DllS4127, DllS917, DllS4146 and DllS915 of 10 short tandem repeat （STR） loci on chromosome 11 were analyzed by fluorescence-based gene scan technique to understand the genetic polymorphisms of those STR loci on chromosome 11 in a Han population in Shaanxi province. The results showed that the number of alleles and genotypes observed at loci DllS1760, DllS4102, DllS4116, DllS4207, DllS4162, DllS914, DllS4127, DllS917, DllS4146 and DllS915 were 17, 11, 15, 11, 4, 6, 7, 12, II and 13 for alleles and 41, 18, 36, 30, 8, 10, 16, 30, 29 and 32 for genotypes, respectively. All the 10 loci were in Hardy-Weinberg equilibrium. The heterozygosities of each STR locus was 86.72%, 67.95%, 83.90%, 85.96%, 58.18%, 57.63%, 72.60%, 72.73%, 77.87% and 86.40%. It concluded the 10 loci on chromosome 11 were relatively highly genetic polymorphic in Han populations and could provide useful markers for genetic studies.