title: [Allele-specific diagnostic PCR authentication of Dendrobium thyrsiflorum].
abstract: The aim of this study was to establish a diagnostic PCR method for authentication of D. thyrsiflorum Rchb. f. Based on rDNA ITS sequences of the 164 samples from 109 Dendrobium species sequenced and quoted from GenBank, the allele-specific diagnostic primers QH-JB1 and QH-JB2 for authentication were designed. Using the primers, diagnostic PCR was performed with the total DNA of D. thyrsiflorum Rchb. f. and other D. species as templates to establish the positive PCR condition for D. thyrsiflorum Rchb. f. A DNA fragment about 300 bp was amplified from D. thyrsiflorum Rchb. f. with anneal temperature at 63.5 degrees C and anneal time at 1 min, whereas no other DNA fragment was amplified from the rest D. species. The allele-specific diagnostic PCR was proved to be a simple and quick identification technique, suitable for the authentication of both fresh and dried materials of D. thyrsiflorum Rchb. f.
authors.affiliation: Key Laboratory of Standardization of Chinese Medicines of the Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Ying
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Zheng-Tao
authors.initials: ZT
authors.lastname: Wang
mesh_terms: D000483:Alleles; D001483:Base Sequence; D018744:DNA, Plant / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000235:genetics*; D031667:Dendrobium / Q000145:classification / Q000235:genetics*; D004340:Drug Contamination / Q000517:prevention & control; D008969:Molecular Sequence Data; D018515:Plant Leaves / Q000235:genetics; D018547:Plant Stems / Q000235:genetics; D010946:Plants, Medicinal / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D015203:Reproducibility of Results; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity
chemical_list: D018744:DNA, Plant; D021903:DNA, Ribosomal Spacer