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选用９ 个性状已稳定的玉米自交系基因型，按Ｇｒｉｆｆｉｎｇ 模式４ 配制３６ 个单交组合，分析１１ 个性状的配合力和产量杂种优势。结果表明：双Ｍ９、新４１５、５ 公在产量及产量重要构成因素的穗长、行粒数上都具有较高的一般配合力，用作亲本较容易测配出长穗型高产组合；４７８２２、黄Ｃ－７００２、４７８ 选具有降低株高、穗位高和提早成熟的作用，是改善株型结构的好材料。３６ 个组合的产量特殊配合力表现为正向和负向二类，其产量高低的趋势多半与特殊配合力大小一致，但也有截然相反的。配合力总效应顺序与产量高低基本相吻合。初步选出双Ｍ９×４７８２２、双Ｍ９×黄Ｃ－７００２、双Ｍ９－５ 公等３ 个强优势组合。
Nine maize inbred lines with stable traits were selected and 36 cross combinations were made according to Griffing pattern 4 to analyze the combining ability and yield heterosis of 11 traits. The results showed that both M9 and New 415.5 had higher general combining ability on the spike length and grain number of the important components of yield and yield, and it was easier to measure the long-ear type and high yield combination as the parents. 47822 , Yellow C-7002,478 selected to reduce plant height, ear height and early maturity role, is to improve plant type structure of good material. The yield combining ability of 36 combinations showed two kinds of positive and negative directions, and the trend of yield level mostly coincided with the special combining ability but the opposite was true. The order of the total effect of combining ability is basically consistent with the level of yield. The preliminary selection of double M9 × 47822, double M9 × yellow C-7002, double M9-5 public three strong combination of advantages.