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通过７×７的双列杂交试验，分析了玉米４个主要品质性状的杂种优势、亲子相关及优势值间的相关。结果表明，淀粉含量的杂种优势最高，其次是油分含量，而蛋白质和赖氨酸含量则呈现负的杂种优势。各性状不同组合的杂种优势存在着较大变异，蛋白质、赖氨酸及油分含量的亲子相关达显著或极显著，在亲本组配时应注意高值亲本的选择。蛋白质含量的中亲优势与赖氨酸含量的中亲优势呈显著正相关，而蛋白质、赖氨酸含量的中亲优势与淀粉含量的中亲优势呈显著的负相关。赖氨酸、淀粉含量的中亲优势与行粒数的中亲优势分别达正的和负的极显著相关，油分含量的中亲优势与百粒重的中亲优势达正的显著相关。
Through the 7 × 7 diallel cross test, the correlations between heterosis, parent-child correlation and dominant value of four major quality traits in maize were analyzed. The results showed that starch content had the highest heterosis, followed by oil content, while protein and lysine content showed negative heterosis. The heterosis of different combinations of different traits varied greatly. The parent-child correlation of protein, lysine and oil content reached significant or extremely significant. In parental grouping, the selection of high-value parents should be noticed. There was a significant positive correlation between the pro-parent advantage of protein content and the mid-parent advantage of lysine content, while the mid-parent advantage of protein and lysine content was negatively correlated with the mid-parental advantage of starch content. The mid-parental advantage of lysine and starch content was positively correlated with the mid-parental advantage of grain-number, respectively, and the mid-parental advantage of oil content was positively correlated with the mid-parental advantage of 100-grain weight.