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以１２ 个来源不同的玉米自交系组成的杂交组合为材料，对Ｌａｎｃａｓｔｅｒ 群自交系的杂种优势进行初步研究，结果表明，Ｌａｎｃａｓｔｅｒ 群与唐四平头，Ｒｅｉｄ、旅大红骨群之间的杂种优势均随性状不同而有所差异。夏播条件下，Ｌａｎｃａｓｔｅｒ 群与唐四平头群和Ｒｅｉｄ 群杂交的产量优势明显大于Ｌａｎｃａｓｔｅｒ 群与旅大红骨群的杂种优势
The hybrid combinations of 12 maize inbred lines from different sources were used as materials to study the heterosis of Lancaster group inbred lines. The results showed that the heterosis between Lancaster group and Tangsipingping, Reid, The advantages are different with different traits. Under summer sowing conditions, the yield superiority between Lancaster group and Tangsiping group and Reid group was significantly greater than that between Lancaster group and Ludahong group