title: [Evaluation of germplasm resource of Ophiopogon japonicus in Sichuan basin based on principal component and cluster analysis].
abstract: OBJECTIVE
  To compare and appraise the quality of germplasm resource of Ophiopogon japonicus in Sichuan basin.
  
  
  METHODS
  According to the main contents and yield traits, 24 wild germplasm resources of O. japonicus from different areas of Sichuan basin were comprehensively compared by the SPSS 17.0 software with principal component analysis and cluster analysis.
  
  
  RESULTS
  The six samples of Ziyang, Jianyang, Leshan, Yibin, Chongqing, Mianyang, their comprehensive evaluation value of quality were higher than the others, and the sample of Ziyang had the best quality, the sample of Dazhou had the least quality, the results of the cluster analysis to raw data were also shown a similar results as principal component analysis.
  
  
  CONCLUSIONS
  The wild resources of O. japonicus in Sichuan basin is rich, there are much differences among their quality; the method, through principal component analysis to study the comprehensive evaluation of the O. japonicus quality, is reliability and the results of cluster analysis is also support the conclusions, it could be able to provide a reference to select high O. japonicus quality resources.
authors.affiliation: College of Agronomy, Sichuan Agricultural University, Ya'an 625014, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Liu
authors.forename: Xingfu
authors.initials: X
authors.lastname: Chen
authors.forename: Sha
authors.initials: S
authors.lastname: Liu
authors.forename: Wenyu
authors.initials: W
authors.lastname: Yang
authors.forename: Gang
authors.initials: G
authors.lastname: Du
authors.forename: Weiguo
authors.initials: W
authors.lastname: Liu
mesh_terms: D016000:Cluster Analysis; D031441:Ophiopogon / Q000737:chemistry*; D025341:Principal Component Analysis