title: [Genetic variation, correlation and principle component analysis on morphological characteristics of various germplasm from Prunella vulgaris].
abstract: OBJECTIVE
  To study the correlation among the morphological characteristics and the spica yield of various germplasm of Prunella vulgaris.
  
  
  METHODS
  The various P. vulgaris germplasm from all over the country were investigated by analysis of correlation analysis, path analysis and principle component analysis in a randomized block experiment.
  
  
  RESULTS
  The 6 morphological characteristics were greatly different from each other in various germplasm. The spica yield per plant had a very significantly positive correlation with the number of spica per plant and fresh leaves weight per plant, meanwhile the correlation between the spica yield per plant and spica length was very significantly. Three principal components which accounted for 87.533% of total variance were extracted from the principal component analysis.
  
  
  CONCLUSIONS
  The strong growth potential, the number of spica per plant and spica length were main factors for the selection of high yield breeding of P. vulgaris.
authors.affiliation: Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Yuhang
authors.initials: Y
authors.lastname: Chen
authors.forename: Qiaosheng
authors.initials: Q
authors.lastname: Guo
authors.forename: Chengya
authors.initials: C
authors.lastname: Wang
authors.forename: Changqing
authors.initials: C
authors.lastname: Ma
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.forename: Weiguang
authors.initials: W
authors.lastname: Sun
mesh_terms: D014644:Genetic Variation; D025341:Principal Component Analysis; D031347:Prunella / Q000033:anatomy & histology* / Q000737:chemistry / Q000235:genetics / Q000254:growth & development*