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DNA bacording of Verbenaceae medicinal plant by using ITS2 and psbA-trnH region
Author(s): 
Pages: 1107-1113
Year: Issue:  8
Journal: China Journal of Chinese Materia Medica

Keyword:  DNA条形码 ITS2 ITS rbcL psba-trnH 马鞭草科;
Abstract: 目的:评价几条热点DNA条形码候选序列对马鞭草科药用植物的鉴别能力。方法:选择psbA-trnH,rbcL,matK,ITS2和ITS序列进行评价,使用各序列的通用引物进行扩增和测序,用扩增及测序成功率,种内种间差异,barcod-ing gap,基于BLAST 1和Nearest Distance方法的鉴定成功率等指标来评价各序列的鉴定能力。结果:对马鞭草科32个种55个样本的序列分析发现,matK的扩增成功率太低,未纳入后续分析;ITS,ITS2,psbA-trnH以及rbcL的扩增及测序成功率分别为83.6%,83.6%,96.4%,98.2%,其鉴定成功率除rbcL为77.8%,75.9%外都为100%,但ITS2序列的种间,种内差异,barcoding gap较psbA-trnH,ITS有明显优势。ITS2序列进一步纳入网上163个样品的数据后其鉴定成功率依然可以达到89.5%,87.6%。结论:考虑到psbA-trnH较高的测序成功率,ITS2和psbA-trnH是适合马鞭草科植物鉴别的一个较好DNA条形码序列组合。
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