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本文用３个奥帕克－２（Ｏ２）玉米和３个普通玉米自交系进行相互杂交和自交，研究了杂交当代的粒重、籽粒密度和赖氨酸含量的杂交优势表现特点。结果表明，用普通玉米和Ｏ２玉米自交系作母本杂交当代粒重较自交有较大优势，并且同类型内杂交优势小于类型间杂交优势；各自交系杂交当代籽粒密度和自交相比优势不大或无优势，只有用普通玉米花粉给Ｏ２玉米授粉，杂交当代优势较明显；同类型自交系间杂交当代籽粒赖氨酸含量和自交相比无差异或差异不大，用普通玉米花粉给Ｏ２玉米授粉，杂交当代赖氨酸含量有不同程度的下降，相反，可使赖氨酸含量有不同程度的提高。
In this paper, three Opaque-2 (O2) maize and three common maize inbred lines were crossed with each other and their self-cross was studied. Hybrid characteristics of hybrid vigor, such as grain weight, grain density and lysine content, were studied. The results showed that with the common maize and O2 maize inbred lines as the maternal hybrids have greater grain weight than the selfing, and the heterosis within the same type is less than that of the maize hybrids. The grain density and self-cross Compared with the advantages of little advantage or no advantage, polluted O2 maize only with ordinary corn pollen, hybrid present advantages are obvious; with the same type of inbred lines between the current grain lysine content and self-made no significant difference or difference, Ordinary corn pollen pollination of O2 corn, hybrid lysine content in varying degrees of decline, on the contrary, lysine content can be increased to varying degrees.