title: [Karyotype analysis of Picris davurica chromosome].
abstract: OBJECTIVE
  To systematically study Picris davurica Fisch chromosome karyotype.
  
  
  METHODS
  Sections combined with micrograph were used to analyse chromosome.
  
  
  RESULTS
  Chromosome number of normal diploid was 2n = 10, karyotype formula was K (2n) = 10 = 2 m + 8 sm, the relative length was 2n = 10 = 2 L + 2 M2 + 4 M1 + 2 S, which belonged to "3 A" type. The total length of chromosome groups was 12.51 microns, the total length of long arms was 8.36 microns, the AS. K% was 66.83%. The total volume of chromosome was 11.71 microns3.
  
  
  CONCLUSIONS
  Picris davurica chromosome number and morphological character were clear.
authors.affiliation: Liaoning College of TCM, Shenyang 110032.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Haibo
authors.initials: H
authors.lastname: Yin
authors.forename: Ming
authors.initials: M
authors.lastname: Sha
authors.forename: Kun
authors.initials: K
authors.lastname: Li
mesh_terms: D019659:Asteraceae / Q000235:genetics*; D002871:Chromosome Banding; D032461:Chromosomes, Plant / Q000648:ultrastructure*; D004171:Diploidy; D007621:Karyotyping; D010946:Plants, Medicinal / Q000235:genetics*