目的对河南省汉族群体的6个短串联重复序列(short tandem repeat,STR)基因座等位基因频率进行研究,获得河南汉族群体D19S253、D14S306、D18S535、D11S2368、D12S391、D4S2639基因座的群体遗传学数据。方法对133名无血缘关系河南汉族个体...
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目的对河南省汉族群体的6个短串联重复序列(short tandem repeat,STR)基因座等位基因频率进行研究,获得河南汉族群体D19S253、D14S306、D18S535、D11S2368、D12S391、D4S2639基因座的群体遗传学数据。方法对133名无血缘关系河南汉族个体的EDTA抗凝血样用酚-氯仿法提取DNA,应用多重PCR扩增技术结合聚丙烯酰胺凝胶电泳对D19S253、D14S306、D18S535、D11S2368、D12S391、D4S2639 6个基因座在河南地区汉族人群中的基因型分布进行分析。结果6个基因座的基因型频率分布均符合Hardy-Weinberg平衡,各基因座的观察杂合度分别为0.764、0.854、0.844、0.921、0.813、0.807,6个位点的累积个体识别率为0.999 999 88,累计非父排除率为0.999 31,累计个体匹配率为1.16×10-7。结论6个基因座在河南汉族群体中具有较高的非父排除率和个体识别率,在法医学和群体遗传学研究中有一定的应用价值。
Prader-Willi Syndrome （PWS） is a genetic disorder that is difficult to detect, particularly at an early age. PWS is caused by disruption of normal, epigenetically controlled gene function in the chromosome 15q11-q13...
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Prader-Willi Syndrome （PWS） is a genetic disorder that is difficult to detect, particularly at an early age. PWS is caused by disruption of normal, epigenetically controlled gene function in the chromosome 15q11-q13 region. Clinical symptoms are difficult to diagnose in infants and only become clearer at later ages as the patients develop hyperphagia and morbid obesity. Molecular genetic tests are able to definitively diagnose PWS and allow early diagnosis of the syndrome. High resolution cytogenetic testing, methylation-specific PCR （MS-PCR）, and linkage analysis are routinely used to diagnose PWS. To establish a linkage analysis method for Chinese patients, this study identified a useful set of STR markers in the typical PWS deletion and adjacent area, for linkage analysis in two Chinese families with PWS offspring. Using this method, the authors confn＇rned that one patient had a paternal deletion in chromosome 15q 11-q 13 and the other patient had maternal uniparental heterodisomy of chromosome 15. MS -PCR and high resolution chromosome G-banding also confirmed this diagnosis. This linkage analysis method can detect both deletion and uniparental disomy, thus providing valuable information for genetic counseling and the opportunity to analyze the relationship between the genotype and phenotype of PWS.
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