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通过对６个基础材料的姊妹交及改良单交种的产量及主要性状的统计分析表明：姊妹交较其对应的姊妹系有明显的优势，其中以产量增加最显著，一些主要性状的差异也达到了显著水平，且较好地保持了原姊妹系的配合力效应，改良单交种与原单交种产量及其它性状差异不显著；不同材料、不同世代及相同材料的姊妹系间的优势指数差异较大。在实际应用中，应根据具体材料进一步试验，选出最优的姊妹交改良玉米单交种，以获得最佳的经济效益。
Through the statistical analysis of the yield and main traits of the silage crosses and the improved single crosses of the six basic materials, it is shown that there are obvious advantages for the sibling to cross the corresponding sister lines, among which the yield increase is the most significant and the difference of some major traits Reached a significant level, and better to maintain the original sibling line with the combining effect, improved single and original single cross-species yield and other traits showed no significant difference; different materials, different generations and the same material between sister lines of the dominant index big different. In practical applications, further tests should be based on specific materials to select the best sisters pay improved corn single cross, in order to obtain the best economic benefits.