title: [Characteristics of germplasm resources in Coix from xishuangbanna].
abstract: OBJECTIVE
  To evaluate the genetic diversity among wild germplasm resources of Coix that distributed at altitude of 550-1550 m in Xishuangbanna, Yunnan province by comparing the morphological variation, biological and economical factors.
  
  
  METHODS
  The field plot experiments were conducted to observation the germination rate, growth period. While the milled rice rate, content of protein, crude fat and ethanol extract of 9 wild Coix germplasm resources were measured.
  
  
  RESULTS
  The germination rate of 9 germplasm was from 22% to 81%, and the growth period was among 139-156 d, which belongs to the medium-late mature type. The germination rate, growth stage, plant height, leaf length and width, tiller number, ramification number, seed number per stem of 9 Coix germplasm were significantly different (P < 0.05), respectively. The range of seed total protein contents were from 15.63% 25.74%, crude fat contents were from 5.05%-7.14%, and the contents of alcohol extract, which showed antitumor activity, were from 5.85%-7.27%.
  
  
  CONCLUSIONS
  The fact of quite different in plant morphological, biological and quality characters of 9 germplasm suggested that the genetic diversity in the wild populations of Coix distributed throughout the regions of Xishuangbanna is relatively abundant.
authors.affiliation: Institute of Medicinal Plant Development Yunnan Branch, Chinese Academy of Medical Sciences and Peking Union Medical College, Jinghong 666100, China.
authors.forename: Janming
authors.initials: J
authors.lastname: Peng
authors.forename: Weiwei
authors.initials: W
authors.lastname: Gao
authors.forename: Chaozhong
authors.initials: C
authors.lastname: Peng
authors.forename: Chunnian
authors.initials: C
authors.lastname: He
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.forename: Wu
authors.initials: W
authors.lastname: Bi
mesh_terms: D002681:China; D031742:Coix / Q000737:chemistry* / Q000235:genetics / Q000254:growth & development* / Q000502:physiology; D018525:Germination; D010936:Plant Extracts / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D012639:Seeds / Q000737:chemistry / Q000235:genetics / Q000254:growth & development / Q000502:physiology
chemical_list: D010936:Plant Extracts; D010940:Plant Proteins