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以近年育成的部分玉米新自交系和骨干系为材料 ,采用不完全双列杂交设计 ,对其主要株型和产量性状进行了遗传研究。结果表明 ,1 0 0 78、32和 1 5 2能明显降低株高、穗位高和叶夹角 ,改善F1的株型结构 ,可用来组配紧凑型杂交种。 6 98_3和 2 0 0B既能改善F1的株型 ,还能改进F1的部分产量结构 ,用其作亲本有利组配出高产紧凑型杂交种。新选系 76 1 3和 2 73能显著改进F1的产量结构 ,其产量配合力显著高于平均效应 ,属于高配合力自交系 ,用其作亲本易配出高产杂交种 ,但其株型要视另一亲本的株型而定
Based on incomplete inbred lines, some inbred lines and backcrops of maize that were bred in recent years were used for genetic studies on their main plant type and yield traits. The results showed that 1 0 0, 78, 32 and 1 5 2 could significantly reduce plant height, ear height and leaf angle, and improve F1 plant type structure, which could be used to assemble compact hybrids. 6 98_3 and 2 0 0B can not only improve F1 plant type, but also improve part of the yield structure of F1, and use it as a favorable parent group to produce high-yielding compact hybrids. The new lines 76 1 3 and 2 73 could significantly improve the yield structure of F1 with a significantly higher yield combining ability than the average effect, belonging to the high combining ability inbred lines. Depending on the plant type of another parent