普通玉米主要品质性状的杂种优势及优势相关性分析

本文通过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。研究结果表明：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。各性状的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。

Analysis of Heterosis and Heterosis Relationships among Grain Quality Characters in Maize

the heterosis of grain quality characters,the correlation between parents and F₁,the heterosis relationships among characters were analysed in a 7×7 diallel set of cross.The heterosis of starch content was the highest.The heterosis of oil content was the second highest.The heterosis of protein and lysine content was negative value.The heterosis of all characters had a large range of variability among crosses.The correlation between parents and F₁ for protein.lysine and oid content was siginificant or high siginificant.The middle-partent heterosis of protein content was signifieantil and positively correlated with that of lysine content.The middle-parent heterosis of protein,lysine content was siginificant,negatively correlated with that of starch content.`