title: [Correlation and path analysis on agronomic traits of Gentiana rigescens].
abstract: OBJECTIVE
  The interrelation of yield and agronomic traits of Gentiana rigescens was studied for the germplasm and breeding variety of this species.
  
  
  METHODS
  Twelve agronomic traits, root diameter, root length, root number, root biomass, stem diameter, plant height, the first branch number, leaf length, leaf width, leaf length/leaf width ratio, calyx length, and calyx number of G. rigescens from 26 wild populations in Yunnan were determined for correlation analysis, multiple stepwise regression analysis and path analysis.
  
  
  RESULTS
  Correlation analysis showed that there were significantly positive correlation between the traits of aboveground part and the length, diameter, number, and biomass of the root. Multiple stepwise regression analysis showed that length, width, and number of root, plant height, the first branch number, and the calyx number were the main factors that affected the root biomass. Path analysis showed that the diameter, length, and number of the root, the stem height, and the first branch number had a direct positive effect on the root biomass.
  
  
  CONCLUSIONS
  The traits, such as high and strong stem, high number of first branch number and shrubby shape could be selected for the breeding and high yielding of G. rigescens.
authors: Institute of Medicinal Plant, Yunnan Academy of Agricultural Sciences, Kunming 650223, China.
authors: Tao
authors: T
authors: Shen
authors: Jinyu
authors: J
authors: Zhang
authors: Weize
authors: W
authors: Yang
authors: Meiquan
authors: M
authors: Yang
authors: Zhenling
authors: Z
authors: Zhao
authors: Zhihui
authors: Z
authors: Zhang
authors: Xiuhua
authors: X
authors: Chen
authors: Hang
authors: H
authors: Jin
authors: Yuehua
authors: Y
authors: Wang
mesh_terms: D030012:Gentiana / Q000254:growth & development* / Q000378:metabolism*; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism