普通玉米和奥帕克-2玉米自交系间杂交当代籽粒性状的表现

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。

THE CHARACTER OF THE F1 OF THE HYBRIDIZATION BY COMMON AND OPAWUE-2 INBRED LINES OF MAIZE

This research studied the heterosis of F1 kernel weight, density and lysine content with intermating or inbreed by 3 opaque-2 (O2) and 3 common inbred lines of maize The result showed that, by using common and O 2 inbred lines as maternal,the F1 kernel weight had some heterosis compared with inbreed ,heterosis of the different types of maize was better than the same types; the F1 kernel density has little or no heterosis, but the hybridization with the common maize using O 2 inbred line as maternal showed obvious heterosis; the F1 kernel lysine content decreased more or less if the common maize pollen was used to pollinate the O 2 inbred line On the other hand , it increased if the O2 inbred line pollen was used to pollinate the common maize