主要介绍了通系5的主要性状与选育过程以及通系5种质的改良创新利用情况。通系5是采用分离小群体法选育的糯质玉米自交系,该自交系具有品质好、配合力高、抗病、抗倒等综合性状好和适应性广等特点。通系5及其衍生系组配的糯玉米系列杂交种已大面积应用于生产,取得了良好的经济效益和社会效益。 This paper mainly introduced the main traits and breeding process of line 5 and the improvement and utilization of 5 kinds of lineages. Line 5 is a waxy maize inbred line selected by small group method. The inbred line has the characteristics of good quality, high combining ability, good comprehensive characters such as disease resistance and lodging resistance, and wide adaptability. Tongliao 5 and its derivatives derived from a series of waxy corn hybrids have been applied to large areas of production, and achieved good economic and social benefits.