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研究了６个温带早熟玉米自交系和１个具有墨西哥高地特性自交系的早熟性状间的相互关系和配合力，同时对子粒产量也进行了研究。旨在利用墨西哥高海拔地区的基因源，改进玉米对寒温环境的适应性，并为选育兼有高产和短生育期的早熟玉米杂交种提供参考依据。
The interrelationship and combining ability of six temperate early-maturity inbred lines and one early-maturing inbred line with highland in Mexico were studied. At the same time, grain yield was also studied. The aim is to improve the adaptability of maize to cold and warm environment by utilizing the gene sources in high altitude areas of Mexico and to provide a reference for breeding early maize hybrids with high yield and short growth period.