采用Griffing完全双列杂交方法 4对西南农业大学农学系新选育的 7个玉米自交系单株产量、穗长、穗重、穗粗、穗位高、株高进行了一般配合力和特殊配合力的测定。结果表明 :这 6个性状组合间都存在显著差异 ;一般配合力高的自交系其特殊配合力也高。其中 ,产量的一般配合力以丙 1 0最高 ,SS1 - 1 8×丙 1 0的产量特殊配合力最高。 Using Griffing complete diallel cross method 4, we studied the general combining ability and special ability of seven maize inbred lines of Southwest Agricultural University, yield, ear length, ear weight, ear diameter, ear height and plant height Determination of cohesion. The results showed that there were significant differences among the six combinations of traits. Inbred lines with high combining ability were also found to have special combining ability. Among them, the general combining ability of yield was highest in C10 and the highest combining ability was in SS1 - 18 × C10.