title: [Quality classification standard of Dipsacus asperoides seed].
abstract: OBJECTIVE
  To establish seed quality classification standard of Dipsacus asperoides.
  
  
  METHODS
  Through the detection on seed purity, 1 000-grain weight, water content, germination rate of D. asperoides from different areas, and observation on seed external characters, the primary seed quality classification standard of D. asperoides was preliminarily formulated.
  
  
  RESULTS
  The first level D. asperoides seed germination rate was over 85%, 1 000-grain weight above 3.94 g, purity above 90.95%, water content lower than 9.08%. The second level D. asperoides seed germination rate was over 64%, 1 000-grain weight was above 3.57 g, purity was over 83.66%, water content was above 10.23%. The third level seed germination rate was above 35%, 1 000-grain weight was above 3.04 g, purity was above 75.51%, water content was lower than 11.37%.
  
  
  CONCLUSIONS
  Germination rate and 1 000-grain weight were the main indexes of quality classification standard, and purity and water content provide the important reference. This quality classification standard of D. asperoides was scientific and feasible, and can be used as the quality control standard of D. asperoides.
authors: Institute of Material Medical Planting, Chongqing Academy of Chinese Materia Medica, Chongqing Engineering Research Center for Fine Variety Breeding Techniques of Chinese Materia Medica, Chongqing 400065, China.
authors: Xue
authors: X
authors: Zhang
authors: Longyun
authors: L
authors: Li
authors: Daxia
authors: D
authors: Chen
authors: Yu
authors: Y
authors: Wang
mesh_terms: D002681:China; D049917:Dipsacaceae / Q000145:classification / Q000254:growth & development*; D002523:Edible Grain / Q000145:classification* / Q000254:growth & development / Q000592:standards*; D018525:Germination; D011786:Quality Control; D012639:Seeds / Q000145:classification* / Q000254:growth & development*