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报道了杉木６个优树无性系半双列交配设计在两个试验点造林５．５年的试验结果：在遗传控制方式中，杉木生长同时受一般配合力和特殊配合力控制，特殊配合力效应不低于一般配合力效应；树高、胸径和材积３个生长性状家系的广义遗传力０．７３１～０．８０１，狭义遗传力０．２２８～０．４８１；杂种优势只有少量组合具有正向优势，其中材积杂种优势最高达２６．０６％；亲本配合力效应及组合生长在亲本间、组合间和地点间均存在显著差异；综合评选出１号、２号和６号３个亲本为较优良亲本，１×６、３×６、１×２、２×３和４×６共５个组合为较优良组合。
This paper reports the results of five and a half years of experiment on afforestation of two optimal clones of Cunninghamia lanceolata with 6 elite clones: In the mode of genetic control, the growth of Chinese fir was controlled by both general combining ability and special combining ability, while the special combining ability effect Not less than the general combining ability effect; The heritability of the generalized heritability of 0.751 ~ 0.801 and narrow heritability of 0.228 ~ 0.481 in three growth traits of tree height, DBH and volume. Only a few combinations of heterosis had positive Among them, the maximum heterosis of calluses was 26.06%. There was significant difference between parental combining ability effect and combination growth in parents, combinations and locations. Three parents of No.1, No.2 and No.6 The elite parents, 1 × 6, 3 × 6, 1 × 2, 2 × 3 and 4 × 6 were the best combinations.