香椿家系生长遗传分析与评价

Genetic Analysis and Evaluation of Different Toona Sinensis Families Growth

在福建邵武开展了香椿70个优树半同胞子代家系林对比试验,对4年生时的家系间生长性状差异进行比较分析。结果表明:香椿家系间树高、胸径、单株材积差异具有高度统计学意意义。根据聚类分析和生长比较结果,将70个家系分为Ⅰ、Ⅱ、Ⅲ、Ⅳ和Ⅴ5个类别,其中,Ⅰ类的家系有11个(家系号为:9、205、44、226、160、34、62、207、209、223、58),表现优异,为优良家系,与参试群体平均表现比较,其4年生时的树高、胸径和单株材积遗传增益分别达到了28.46%、19.09%和56.83%,增产效益显著。

By randomized block analysis, the growth traits of 4-year-old 70 families of Toona sinensis in Fujian Shaowu are investigated. The results showed that： the average height in the range is between 1.30m-6.32m, the average diameter between 1.25 to 5.22 cm, the average individual volume 1.7x104to 88.4x104 m3. The differences of tree height, DBH and individual volume of 70 families all reached a very significant level. Abundant variability and high family heritability of each family provides important reference for selecting excellent pedigree. Cluster analysis and growth comparison showes that 70 families could be divided into I HIVand Vfive categories. 11 fami-lies are considered outstanding performance （pedigree number： 9,205,44,226,160,34,62,207,209,223,58）, and the average genetic gain of its height, DBH and individual volume respectively reaches 28.46%, 19.09% and 56.83%. They have strong adaptability and good growth, which are considered as relatively good pedigree.