利用我省大面积推广的73单交、中单二号、黔单四号作母本,用贞367突变系(自交系)作父本,组配成73单交×贞367、中单二号×贞367和黔单四号×贞367等3个三交种,试验结果,3个三交种比73单交增产0.95～6.3％,分别比相应母本单交种增产0.14～5.88％。3个三交种与其母本单交种产量没有显著差异。但三交种制种产量高,品质比单交种大为改进,因此认为组配三交种,实行单交、三交、双交种配套推广、综合利用,对加快我省杂交玉米推广具有现实意义。 Using the 73 single cross, Zhongdan II and Qiandan IV as the female parents in large-scale popularization in our province, the parents of inbred 367 lines were used as male parents, The results showed that the yield of three crossbreds increased from 0.95 to 6.3% compared with that of 73 crossbreds, which increased 0.14-5.88 than that of the corresponding single parental crossbreds %. There was no significant difference in the yield of three crossbreds and their parental single cross. However, the three cross seed production of high yield and quality greatly improved than the single cross-species, that the group with three cross-species, the implementation of single, three cross, double cross-breeding supporting the promotion and utilization of hybrid corn in our province to speed up the promotion of Realistic meaning.