针对云南各地在春大白菜种植中存在的结球不紧、口感欠佳、商品性差等问题 ,昆明市农科所在 80年代后期进行了育种材料的搜集、整理及杂优新品种的选育工作。在纯化育种材料进而选育出自交不亲和系亲本的基础上 ,于 1993年获得性状优良的大白菜杂交组合 93- 93。在品比试验、区 In order to solve the problems of poor knotting, poor mouthfeel and poor merchandises in spring Chinese cabbage planting in Yunnan Province, Kunming Agronomy Co., Ltd. collected and sorted breeding materials and breeding new hybrid varieties in the late 1980s . On the basis of purifying the breeding materials and breeding parents and parents, we obtained the Chinese cabbage hybrid 93-93 with good traits in 1993. In the ratio test, the district