A Study of Turpentine Composition of High-resin-yield Pinus kesiya var. langbianensis

To study the genetic variation of resin yield and chemical components, the resin yield and chemical components were measured and the variation and correlation among the components of 40 clones were analyzed. The analysis of variances indicated extremely significant difference in all components acid among the clones, and the heritability was 0.53~0.96, which indicated that these chemical components were controlled by strong genetic factors with strong breeding potential. The clone selection with specialty chemical composition could achieve better results through clonal selection. There was a significant positive correlation between resin yield and alpha pinene.