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本文以湘玉7号的育成为例，论述了适应于南方的玉米良种的高产稳产的主要目标性状，即株型紧凑，生育期适中，千粒重与穗粒数协调，抗旱耐瘠，抗病抗虫；提出了此类品种的选育技术，即选用含有适应于不同生态条件的含有目标性状的优良基因型材料为原始材料；重视早代系配合力测定并与晚代系配合力测定相结合，加大选择压力，严格撑握选择标准，合理地组配杂交组合。
In this paper, the breeding of Xiangyu 7 was taken as an example. The main target traits of high yield and stable yield of corn varieties adapted to the south were discussed, that is, compact plant type, moderate growth period, coordination of thousand kernel weight and spike grain number, drought resistance and barrenness, disease resistance The breeding technology of such breeds was proposed, that is, the selection of good genotypes containing target traits adapted to different ecological conditions as the raw material; the determination of the combining ability of the early lines and the determination of the combining ability of the late lines , Increase the pressure of selection, strictly hold the selection criteria, and rationally match the cross combination.