1985年上海市农业局蔬菜处从日本引进五个甘蓝品种,经当年秋季试种,表现结球紧实、耐热、早熟,整齐度中等。拟作为亲本与本地品种配组。为此,选择优良单株留种,并测定其亲和指数,以鉴定其是否为自交不亲和系。五个品种按其不同类型分别编号为K_1、K_2、K_3、K_4、K_5,从中选择早熟,球紧的单株留种, 1985 Shanghai Bureau of Agriculture vegetables from Japan introduced five varieties of cabbage, the autumn of the year of trial, the performance of tight knot, heat, precocious, uniform degree medium. Proposed as a parent and local varieties with the group. To this end, the choice of excellent single plant species, and determine its affinity index to identify whether it is self-incompatible. The five cultivars were numbered K_1, K_2, K_3, K_4 and K_5 according to their different types,