建始县长岭岗林场29 a生日本落叶松自由授粉家系子代测定林为研究对象，通过对生长性状进行遗传变异分析，结果表明：不同家系之间树高和材积存在极显著差异，不同家系之间的胸径存在显著差异，各生长性状的家系遗传力大于单株遗传力，表型变异（CVP）均明显高于遗传变异（CVG），日本落叶松家系间和家系内个体间存在较大的差异；利用最佳线性预测（BLP）方法采用家系与家系内个体联合估算育种值，按入选率为10％，选择出40个优良单株，为该地区营建高世代种子园及品种遗传改良与推广提供优质材料和科学依据。%We carried out 29‐year‐old progeny test of open‐pollinated families of Larix kaempferi in Jianshi County ,by the study of the genetic variation of growth characteristics analysis .The results showed that the different families had ex‐tremely significant differences between tree height and volume ,diameter at breast height had exist significant differences in different families ,the growth traits of the heritability was greater than the individual heritability ,genetic variation of phenotypic variation (CVP) were significantly higher than (CVG) , Larix kaempferi had significant differences in fami‐lies and individuals;we adopted a methods of optimal Best linear prediction (BLP) the individual within the family and the family joint estimate the breeding value ,according to ten percentage selection rate ,then we selected 40 superior indi‐viduals for clone breeding ,seed orchard construction high generation in the region ,varieties popularized ,provided the fine genetic materials and scientific basis .
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