Correlation and Path Analyses of Vindoline with Major Agronomic Traits in Catharanthus roseus
长春花主要农艺性状与文多灵含量的相关及通径分析

Vindoline content in 23 Catharanthus roseus varieties currently cultivated all over the world was measured by reverse-phase high performance liquid chromatography (RP-HPLC). Vindoline content was compared by correlation and path coefficients with 12 major gronomic traits of the varieties. Vindoline content showed a positive correlation with leaf width, plant height, whole-plant leaf weight, 100-leaf weight, petal diameter and leaf length; the positive correlation was significant for first lateral branch number and stem diameter (P<0.05) and notable for internodal distance. Vindoline content showed a negative correlation with ratio of leaf length to width, seed pod length and seed number per pod. Path analysis showed internodal distance,first lateral branch number and whole-plant leaf weight with a significant positive effect on vindoline content (P<0.05), with path coefficients of 0.959, 0.716 and 0.431 respectively, which suggests that internodal distance, first lateral branch number and whole-plant leaf weight are the important factors in breeding C. roseus with high vindoline content.