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阐述了在温带玉米育种项目中引进热带、亚热带玉米种质的原因，分析了这类种质的生物学和配合力特性、引进原则、应用方式及其效果，讨论了几个玉米种质引进和改良应用方面的问题，供玉米育种工作者参考。
The reasons for introduction of tropical and subtropical maize germplasm in temperate maize breeding project were expounded. The biological and combining ability characteristics, introduction principles, application methods and effects of such germplasm were analyzed. Several maize germplasm introduction and Improve the application of the problem for reference corn breeding workers.