中药材鳖甲的位点特异性PCR鉴定研究

目的 本研究旨在建立一种简便、实用的鳖甲DNA分子鉴定方法。方法 根据中华鳖和鳖甲混淆品原动物的125rRNA基因片段的序列数据库,找出中华鳖与其它鳖科动物有明显区别的位点,设计1对能特异性鉴别中华鳖的引物,然后利用鳖甲中残存的DNA,通过PCR拉增,即可准确鉴别鳖甲。结果 用这对引物对不同来源的10块鳖甲进行鉴定结果表明,其中有3块为伪品,结果与DNA序列分析鉴定一致。还测定了斑龟和鳖甲一伪品12SrRNA基因片段序列。结论 该引物配置药材鉴定试盒可在鳖甲类药材鉴定使用。

Authentication of TCM Carapax Trionycis by allele-specific diagnostic polymeras chain reaction

Object\ To develop a convenient and practical method for the identification of Carapax Trionycis Methods\ Based on the sequence variations of 12S rRNA gene between Pelodiscus sinensis and other softshell turtles, a pair of allele specific primers was designed to distinguish P. sinensis from other species of Trionychidae. DNA were extracted and anplified and Carapax Trionycis could be identified accurately by polymerase chain reaction (PCR) using the primers Results\ Ten samples of turtle shell from different sources were indentified by the allele specific PCR with the primers The result indicated that three samples were substitutes of Carapax Trionycis, consilient with the result from DNA sequence analysis The mitochondrial 12S rRNA gene fragment of P. maculatus and a faked imitation had also been sequenced Conclusion\ The primers could be used as key components in Carapax Trionycis identification kit