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作 者 ：潘惠新 黄敏仁 阮锡根 李火根 王明麻

期 刊 ：林业科学 1996年 32卷 5期 页码：426-433

关键词：单色软X射线木材密度计；新无性系；年轮密度组成性状；遗传参数；

Keywords:Monochromical soft X-ray densitometer, New clones, Ring density components, Genetic parameter,

摘 要 ：用单色软X射线木材密度计研究了11年生美洲黑杨×小叶杨新无性系年轮密度组成性状遗传变异。结果表明,年轮密度组成各性状无性系间存在极显著差异;年轮密度、早材密度、最小密度、最大密度及木材密度梯度等性状遗传力比较高(h²=0.41—0.58),而晚材密度、早晚材密度比及密度变异幅度等性状遗传力比较低(h²=0.15—0.25);同时各性状遗传力因生长林龄不同而不同。

Abstract:In this paper the genetic variations of ring density component traits of new clones in Populus deltoides×P. simonii were studied. The reslllts show that each trait value of ring density components is obviously different among the clones. The broad heritability of ring density,earlywood density,mininlum wood density, maximum wood density and gradient of wood density were high (h²=0. 41-0. 58);but the broad heritability of latewood density,latewood density/earlywood density and variation range of wood density were low (h²=0. 15-0. 25). At different ages the broad heritability of same trait was different.

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