对 3片杉木分组群状多系杂交子代测定林的研究表明 ,树高、胸径和材积在不同地点间存在着极显著的差异 ,群组和亲本与地点的交互作用达显著水平 ,在各地点参试的群组及亲本具有丰富的遗传变异 ;胸径、树高和材积的家系遗传力变动在 0 .36和 0 .40之间 ,单株遗传力在 0 .0 7和 0 .1 1之间 ,当亲本入选率为 0 .0 5～0 .1 5时 ,胸径、树高和材积的遗传增益分别为 2 .45 %～ 4.36 %、2 .2 4%～ 3.96 %和 6 .6 3%～ 1 1 .77% ;根据对群组和亲本的综合评价 ,选出即高产又稳定的群组 2个和亲本 2 3个 ;并对分组群状多系杂交设计的方法和效果进行了讨论 The study on three groups of Cunninghamia lanceolata multi-line offspring afforestation showed that there were extremely significant differences in tree height, DBH and volume between different sites, and the interaction between groups and parents reached a significant level The results showed that there were abundant genetic variations among the tested groups and parents; the heritability of pedigree with DBH, tree height and volume was between 0.36 and 0.40, and the heritability of heritages was 0.07 and 0.11 The genetic gain of DBH, tree height and volume were 2.45% -4.46%, 2.24% -3.66% and 6.6 respectively when the parents’ selection rate was 0. 05 ~ 0. 3% -11.77%. According to the comprehensive evaluation of the group and the parents, 2 high-yielding and stable groups and 2 3 parents were selected. The methods and effects of the grouping-group multi-line hybridization design Discuss