Study and Comprehensive Evaluation on Wood Variation of Acacia mangium × A. auriculiformis Clones
This study investigated the genetic variation in wood traits of Acacia mangium × A. auriculiformis clones and identifies superior clones through a comprehensive evaluation,providing a theoretical basis for the targeted cultivation and utilization of industrial timber plantations. The research focused on nine 5-year-old clones from the Dannan Mountain Forest Farm in Sihui,Guangdong,assessing twelve wood traits,including basic wood density,fiber morphology,and wood anatomical properties. Genetic variation analysis,correlation analysis,cluster analysis,and principal component analysis (PCA) was used to comprehensively evaluate the wood quality of the nine clones. The results indicated that the coefficient of variation for the twelve wood traits ranged from 2％ to 14％,with the smallest variation coefficient observed for the vessel diameter ratio and the largest for the conduit proportion. The average basic density of the wood was 0.506 g·cm-3,with a range from 0.459 to 0.569 g·cm-3. Different degrees of correlation exist among the wood traits. Principal component analysis extracted three principal components,with a cumulative contribution rate of 85.0％,sufficiently representing all genetic information. Based on the scores of these three principal components and their corresponding weights,we established a comprehensive evaluation model for the wood quality of the nine clones. The top three clones based on the comprehensive score are lines No.2,No.8,and No.9. Cluster analysis classified the nine clones into three groups,which aligned closely with the PCA results.
万方数据
维普
