中国北方人群14个短串联重复序列位点的遗传多态性分析

目的 分析中国北方汉族人群中染色体7p14—15区域内6个短串联重复序列(short tandem repeat，STR)位点和12q13区域内8个STR位点的遗传多态性。方法 采用荧光标记PCR扩增技术和毛细管电泳方法，对染色体7p14—15区域内D7S1808、D7S2250、D7S2251、D7S683、D7S656、D7S528位点和12q13区域内D12S1056、D12S1293、D12S83、D12S1655、D12S1662、D12S334、D12S137、D12S102位点在100名随机选取的无血缘关系的中国北方汉族人群中的遗传多态性进行分析。结果 在中国北方汉族人群中，染色体7p14-15区域的D7S1808、D7S2250、D7S2251、D7S683、D7S656和D7S528位点分别检测出7、8、7、4、6和5个等位基因，24、27、22、10、17和13种基因型，杂合度分别为86％、88％、83％、79％、85％和80％；染色体12q13区域的D12S1056、D12S1293、D12S83、D12S1655、D12S1662、D12S334、D12S137和D12S102位点分别检测出5、5、8、6、6、6、5和7个等位基因，15、15、29、17、17、19、13和24种基因型，杂合度分别为86％、84％、87％、82％、84％、85％、81％和89％。结论 染色体7p14—15区域的6个STR位点和12q13区域的8个STR位点基因频率分布符合Hardy—Weinberg平衡，并在中国北方汉族人群中呈现较好的遗传多态性。

Analysis on genetic polymorphism of 14 short tandem repeat loci on chromosome 7p14-15 and 12q13 in Chinese north Hans

Objective To analyze the genetic polymorphism of 6 short tandem repeat(STR) loci on chromosome 7p14-15 and 8 STR loci on chromosome 12q13 in Chinese north Hans. Methods Fluorescence-labeling polymerase chain reaction and capillary electrophoresis were used to analyze the genetic polymorphism of 100 randomly selected individuals from Chinese north Han nationality at 6 STR loci(D7S1808, D7S2250, D7S2251, D7S683, D7S656 and D7S528) on chromosome 7p14-15 and 8 STR loci(D12S1056, D12S1293, D12S83, D12S1655, D12S1662, D12S334, D12S137 and D12S102)on chromosome 12q13. Results In the Chinese north Han population, 7 alleles and 24 genotypes, 8 alleles and 27 genotypes, 7 alleles and 22 genotypes, 4 alleles and 10 genotypes, 6 alleles and 17 genotypes, 5 alleles and 13 genotypes were observed at D7S1808, D7S2250, D7S2251, D7S683, D7S656 and D7S528. The heterozygosities at the above 6 STR loci were 86%, 88%, 83%, 79%, 85% and 80%, respectively. Five alleles and 15 genotypes, 5 alleles and 15 genotypes, 8 alleles and 29 genotypes, 6 alleles and 17 genotypes, 6 alleles and 17 genotypes, 6 alleles and 19 genotypes, 5 alleles and 13 genotypes, 7 alleles and 24 genotypes were observed at D12S1056, D12S1293, D12S83, D12S1655, D12S1662, D12S334, D12S137 and D12S102. The heterozygosities at the above 8 STR loci were 86%, 84%, 87%, 82%, 84%, 85%, 81% and 89%, respectively. Conclusion The distributions of allele frequencies of 6 STR loci on chromosome 7p14-15 and of 8 STR loci on chromosome 12q13 were consistent with the Hardy-Weinberg equilibrium. The highly genetic polymorphism was observed in Chinese north Han population.