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以包含１１个早熟自交系的共２４个自交系及由它们配成的含有正、反交组合的１１６个单交组合（１９９１年）和１２２个单交组合（１９９２年）为材料，研究了玉米早熟性及产量与有关性状的相关性、早熟性的遗传特点。结果为单交组合生育期与其小区产量呈正相关，但也有个别组合表现既早熟又较高产的；单交组合生育期与其株高、单株叶数均呈正相关；单交组合单株籽粒产量与株高、行粒数、百粒重呈正相关，与穗行数基本无相关；杂交组合生育期多数介于双亲生育期之间，并稍偏晚熟亲本，早熟的显性度为０．２２（１９９１年）和０．３７（１９９２年），杂交组合Ｆ１生育期与双亲生育期平均数（Ｘ）之间存在显著正相关关系，回归方程为ｙ＝１０．９＋１．１７Ｘ，早熟性的正、反交组合之间不存在显著差异。
A total of 24 inbred lines, including 11 early-maturing inbred lines, and 116 single crosses (1991) and 122 single crosses (1992) The genetic characteristics of maize related to early maturity, yield and related traits and early maturity were studied. The results showed that the single cross combinations had a positive correlation with the yield of the plot during the growing period, but some combinations showed both early and high yield. The single cross combinations had a positive correlation with the plant height and the number of leaves per plant. There was a positive correlation between plant height, grain number and grain weight per plant, but no correlation with the number of ear rows. The most of the hybrid combinations were between parents during their parental growth period, 1991) and 0.37 (1992). There was a significant positive correlation between the F1 growth stage and the mean number of parents during the breeding period (X). The regression equation was y = 10.9 + 1.17X, positive for early maturity, There was no significant difference between the anti-cross combinations.