title: [Comparison on agronomy and quality characters of selective strain of Schizonepeta tenuifolia].
abstract: OBJECTIVE
  With the purpose of selecting adequate quality and high production of Schizonepeta tenuifolia, the comparative experiments were carried out on different strain of S. tenuifolia in 2007.
  
  
  METHODS
  The test fields were divided into blocks randomly, and the agronomy characters were investigated in harvest time; the content of volatile oil was measured by steam distillation and the pulegone were determined by HPLC.
  
  
  RESULTS
  The yield of S4 was 18.63% and 29.99% higher than that of CK1 and CK2, respectively. The contents of volatile oil and pulegone were also higher than those of CK and other strains in this test.
  
  
  CONCLUSIONS
  S4 shows the advantages of high production, strong disease resistance and high active components. S4 would be extended as the good breed in production.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Cao
authors.forename: Yue
authors.initials: Y
authors.lastname: Jin
authors.forename: Jianhe
authors.initials: J
authors.lastname: Wei
authors.forename: Qinglong
authors.initials: Q
authors.lastname: Chu
authors.forename: Runhuai
authors.initials: R
authors.lastname: Zhao
authors.forename: Weiquan
authors.initials: W
authors.lastname: Wang
mesh_terms: D000383:Agriculture; D001947:Breeding; D019686:Lamiaceae / Q000737:chemistry / Q000235:genetics / Q000254:growth & development / Q000502:physiology; D011786:Quality Control; D013997:Time Factors; D014835:Volatilization