title: [A comparison of the its sequences of the Tibetan medicine "zang yin chen"--Swertia mussotti and its adulterant species].
abstract: OBJECTIVE
  To identify the medicine and search for new medicine resource at the molecular level, the ITS of "Zang Yin Chen"--Swertia mussotti and its adulterant species were sequenced.
  
  
  METHODS
  The double-stranded DNA was amplified using PCR systems 9,600 kits and sequenced on an ABI 377 automated sequencer from both directions.
  
  
  RESULTS
  The ITS sequences of S. mussotti in different populations showed no variation. It has the unique ITS sequence and shows distinct difference from its adulterant species. In the phylogenetic tree based on the ITS data of S. mussotti and all vicarious species constructed by Paup, S. franchetiana and S. mussotti clustered together with high bootstrap support.
  
  
  CONCLUSIONS
  ITS sequences can be used for the molecular authentication between the S. mussotti and its adulterant species. S. franchetiana can be regarded as a new medicine resource of "Zhang Yin Chen".
authors.affiliation: Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China. ljqdxy@public.xn.qh.cn
authors.forename: J Q
authors.initials: JQ
authors.lastname: Liu
authors.forename: Z D
authors.initials: ZD
authors.lastname: Chen
authors.forename: Z X
authors.initials: ZX
authors.lastname: Liao
authors.forename: A M
authors.initials: AM
authors.lastname: Lu
mesh_terms: D001483:Base Sequence; D018744:DNA, Plant / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics; D004340:Drug Contamination; D010946:Plants, Medicinal / Q000235:genetics*; D029967:Swertia / Q000145:classification / Q000235:genetics*; D018609:Tibet
chemical_list: D018744:DNA, Plant; D004275:DNA, Ribosomal