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根据子代测定结果,参试的22个家系可分为3种类型,即“速生稳定型”,占23.8%,“慢生型”,占19.0%,“变化型”,占57.2%。通过综合评定,从22个家系中选出5个优良家系,与对照相比,树高大13.8%,胸径大29.1%,材积大69.9%,在树高、胸径生长上分别可获得9.1%、17.5%的遗传增益。从种子园自由授粉54个家系中选出11个优良家系,树高的增益为21%。生长性状早晚相关分析结果,说明早期选择是有效的。
According to the results of offspring test, the 22 tested families can be divided into three types, namely “fast stable type”, accounting for 23.8%, “slow type”, accounting for 19.0%, “change”, accounting for 57.2%. Five excellent families were selected from 22 families by comprehensive evaluation. Compared with the control, the tree height was 13.8%, the diameter at breast height was 29.1%, the volume was 69.9%, and the tree height and DBH growth were 9.1%, 17.5 % Of genetic gain. Eleven elite families were selected from 54 families freely pollinated in the seed orchard with a tree height gain of 21%. Early and late correlation analysis of growth traits showed that early selection was effective.