The correlation between traits and genetic parameters expressed in three years old gentiana scabra in the key growing stage was analysied in this experiment The results showed that coefficient of variation of stem diameter, tille mumber, branches and bud numbers was bigger in the bud stage. Especially, there was a significent correlation between the bud numbers and branches. These results demonstrate that there was significent difference between the sigle plants. That is to say, these characters could be used as seleccn'on standard in breeding. In stuge of root weight gain, the coefficient of variation of stem diameter, tille rnumber, hair root number and hair root weight was bigger,which was about 50%. There were extremely significant correlation or significant correlation between hair root weight and stem diameter, tille mumber, hair root number,hair root diameter which were four characters correlated with high yeild. Thus, when we selcted the characters in breeding process, we should act in bud stage and root weight gain.%本试验对3年生糙龙胆生长关键期主要性状的遗传参数及性状间相关性进行了分析.结果表明,孕蕾期以茎粗、分蘖数、分枝数和花蕾数性状变异系数较大,在品种选育中选择潜力较大.其中,与种子产量性状和花蕾数呈极显著相关的分枝数可作为种子高产目标的相关性状.根增重期以茎粗、分蘖数、须根数、根重4个性状变异系数较大,变异系数均在50%左右;根重与茎粗、须根数、分蘖数、根粗呈极显著或显著相关,这4个性状可作为糙龙胆高产目标的相关性状.糙龙胆选择育种的最佳时期为孕蕾期和根增重期.
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