3種DNA提取法在污染嚴重混合斑分型中的應用比較
[Abstract]:Objective to compare the application effect of Chelex-100 method, phenol / chloroform method and silica membrane method in the classification of seriously polluted mixed spot. Methods Twenty-five samples of seriously polluted mixed spots were collected from daily cases. Sperm were separated by differential digestion and Chelex-100 was used at the same time. DNA, was extracted by phenol / chloroform method and silica membrane technique. Three genotypes of D19S253FGA and CSF1PO were classified by PCR-STR technique. The electrophoretic patterns were processed by Gel-Pro software and the differences between different methods were analyzed and compared by SPSS software. Results the typing results of DNA,25 samples extracted by Chelex-100 method were not successful, 10 of 25 samples were successfully typed by phenol / chloroform method, 3 samples were genotyped by FGA and CSF1PO loci, and 4 samples by CSF1PO loci. Silica membrane purification method, 25 samples were successfully classified; phenol / chloroform method and silica membrane method were compared, the results showed significant difference (P0.05). Conclusion silica membrane purification technique can effectively remove PCR inhibitor, and the amplification effect of DNA extracted is better than that of Chelex-100 and phenol / chloroform method.
【作者單位】: 華中科技大學同濟醫(yī)學院法醫(yī)學系 河南科技大學法醫(yī)學院 華中科技大學同濟醫(yī)學院法醫(yī)學系
【分類號】:D919
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