选择４个产地的樟子松优树、１６个优良无性系于１９９０年进行杂交，获得３２个组合，１９９２年播种育苗，１９９４年造林。１９９７年对林分调查分析，６年生时最优组合的树高生长比ＣＫ１大１６７５％，比ＣＫ２大１４３９％，各组合平均比ＣＫ１大１１２３％；最优组合地径生长比ＣＫ１大１６９０％，比ＣＫ２大１４９１％，各组合平均比ＣＫ１大１０７８％。优良杂交组合大多数来自于一般配合力高的亲本。在各优树产地中，树高、地径的一般配合力效应值均以卡伦山产地的最大，罕达盖产地的次之。 Four dominant provenances of Pinus sylvestris var. Mongolica were selected and 16 elite clones were crossed in 1990, obtaining 32 combinations. Seedlings were planted in 1992 and afforestation in 1994. According to the investigation and analysis of stand in 1997, the tree height growth of 6-year-old optimal combination was 1675% higher than CK1, 1439% higher than CK2, and the average combination height was 1123% higher than CK1. The optimal combination diameter The growth was 1690% larger than that of CK1 and 1491% higher than that of CK2. On average, each combination was 1078% larger than CK1. The majority of elite crossings come from parents with high combining ability. In each of the Yushu producing areas, the general combining ability effect value of tree height and ground diameter are the largest in the Karen Mountains origin and the second in the Qaidam Basin.