title: [Heterosis analysis of the main agronomic characters of Platycodon grandiflorum].
abstract: OBJECTIVE
  Breeding the good varieties characters of Platycodon grandiflorum.
  
  
  METHODS
  20 combination, derived from 2 x 10 incomplete diallel cross with 2 male sterile lines and 10 four-generation inbred lines, analysis the 13 agronomic characters.
  
  
  RESULTS
  The agronomic characters of F1 has obvious heterosis. Dry plant weight and fresh root weight have the largest heterosis. Their middle parent heterosis (MPH), high parent heterosis (HPH) and heterosis over CK (CH) were 96.07%, 62.62%, 116.21%, 108.99%, and 111.98%, 113.47%, respectively.
  
  
  CONCLUSIONS
  The F1 hybrids derived from the crossing of male sterile lines and in-bred lines have obvious heterosis. It applied the hybrid heterosis breeding is an effective way for the new variety of Platycodon grandiflorum.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing 100193, China. ykzhao@implad.ac.cn
authors.forename: Yu-Kai
authors.initials: YK
authors.lastname: Zhao
authors.forename: Jian-He
authors.initials: JH
authors.lastname: Wei
authors.forename: Cheng-Min
authors.initials: CM
authors.lastname: Yang
authors.forename: Feng-Hua
authors.initials: FH
authors.lastname: Shi
authors.forename: Qing-Long
authors.initials: QL
authors.lastname: Chu
authors.forename: Shu-Yan
authors.initials: SY
authors.lastname: Wang
mesh_terms: D000383:Agriculture / Q000379:methods; D018533:Biomass; D001947:Breeding / Q000379:methods*; D006823:Hybrid Vigor; D006824:Hybridization, Genetic; D035261:Plant Components, Aerial / Q000033:anatomy & histology / Q000254:growth & development; D018517:Plant Roots / Q000033:anatomy & histology / Q000254:growth & development; D031238:Platycodon / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development*