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对杉木无性系生长性状、木材基本密度和管胞长度的遗传变异进行了研究。结果表明,无性系间树高、胸径、材积、木材基本密度和管胞长度存在显著至极显著差异。5个性状(树高、胸径、材积、木材基本密度和管胞长度)都受中等强度的遗传控制,无性系重复力分别为0.771,0.651,0.566,0.529和0.495。树高、胸径和材积与木材基本密度、管胞长度间以及木材基本密度与管胞长度间呈遗传负相关。通过多性状综合指数选择选出2个纤维用材优良无性系。
The genetic variation of Chinese fir clonal growth traits, wood basic density and tracheid length were studied. The results showed that there was a significant to very significant difference in tree height, DBH, timber volume, basic wood density and tracheid length among clones. Five traits (tree height, DBH, volume, wood basic density and tracheid length) were all moderately controlled by the genetics. The clonal restoring forces were 0.771, 0.651, 0.566, 0.529 and 0.495 respectively. The tree height, DBH and wood volume were in a negative correlation with the basic density of wood, the tracheid length and the basic density of wood and the tracheid length. Two clones with excellent fiber quality were chosen through multi-index selection.