title: [Identification of gentianae macrophyllae radix using the ITS2 barcodes].
abstract: DNA barcoding is a rapidly developing frontier technology in the world and will be useful in promoting the quality control and standardization of traditional Chinese medicine. Until now, many studies concerning DNA barcoding have focused on leaf samples but rarely on Chinese herbal medicine. There are three issues involved in DNA barcoding for traditional Chinese medicinal materials: (1) the extraction methods for total DNA of the rhizomes of the medicinal materials; (2) intra-specific variation among samples from different places of origin; (3) accuracy and stability of this method. In this study, Gentianae Macrophyllae Radix was used to verify the stability and accuracy of DNA barcoding technology. Five regions (ITS2, psbA-trnH, matK, rbcL, and ITS) were tested for their ability to identify 86 samples of Gentianae Macrophyllae Radix and their adulterants. After improving the DNA extraction method, genomic DNA from all samples was successfully obtained. To evaluate each barcode's utility for species authentication, PCR amplification efficiency, genetic divergence, and species authentication were assessed. Among all tested regions only ITS2 locus showed 100% of PCR amplification and identification efficiencies. Based on the established method, we successfully identified two samples of Gentianae Macrophyllae Radix bought in pharmacy to the original species.
authors: The National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
authors: Kun
authors: K
authors: Luo
authors: Pei
authors: P
authors: Ma
authors: Hui
authors: H
authors: Yao
authors: Tian-Yi
authors: TY
authors: Xin
authors: Yan
authors: Y
authors: Hu
authors: Si-Hao
authors: SH
authors: Zheng
authors: Lin-Fang
authors: LF
authors: Huang
authors: Jun
authors: J
authors: Liu
authors: Jing-Yuan
authors: JY
authors: Song
mesh_terms: D058893:DNA Barcoding, Taxonomic / Q000379:methods*; D018744:DNA, Plant / Q000032:analysis / Q000235:genetics; D004340:Drug Contamination; D014644:Genetic Variation; D018745:Genome, Plant; D030012:Gentiana / Q000145:classification / Q000235:genetics*; D018517:Plant Roots / Q000235:genetics; D010946:Plants, Medicinal / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D011786:Quality Control; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D018744:DNA, Plant