优良杂交玉米,对于提高玉米单位面积产量有其重要作用,要选育出优良杂交玉米,就必须配制强优势的杂交组合。为了提高配制强优势的杂交组合的预见性,我们对杂交玉米亲本的主要经济性状遗传变异规律,它们之间的相关性,及其与产量的关系进行了研究,其结果如下。一、试验材料与方法本试验是在1974年晚造玉米和1975年早 Good hybrid maize, for improving yield per unit area of ​​corn has an important role to bred good hybrid corn, we must formulate a strong hybrid combinations. In order to improve the predictability of hybrid combinations with strong preponderance, we studied the genetic variation of the main economic traits, the correlation between them and their relationship with the yield of hybrid maize. The results are as follows. First, the test materials and methods This experiment was made in the evening of 1974 and corn in early 1975