正品和伪品大黄的RAPD指纹图谱鉴定研究

目的 用RAPD方法对正品和伪品大黄进行指纹图谱的研究，为正品和伪品大黄的基原鉴定提供分子依据。方法 对RAPD反应的实验体系进行了优化，并采用个体筛选的方法筛选121个引物，采用BSA的方法筛选了64个引物。结果 分别得到了2个具有正品大黄的特征性条带的引物。结论 该方法可靠、准确、快速、重现性好，达到了在分子水平上鉴定正品和伪品大黄基原的目的。此外，该实验亦表明BSA的方法筛选种的特征性条带的引物的效率比个体筛洗引物的效率高。

Fingerprint research on authentication of official and unofficial plants of Rheum L.by RAPD

Object In order to identify the resources of official and unofficial plants in Rheum L.at molecular level, a random amplified polymorphic DNA (RAPD) analysis was performed. Methods The amplification program of polymerase chain reaction (PCR) was optimized. Arbitrary decamer primers of 121 based on the individual selecting method, and 64 based on the BSA method were screened. Results Four primers among all screened primers were found to be useful to amplify specific strips to the official plants of Rheum L. Conclusion This method is reliable, accurate, quick and reproducible for authenticating the official and unofficial plants of Rheum L. at molecular level. Moreover, the experiment results indicate that it is more effective to screen the primers using BSA method than using individual selecting method.