花椰菜杂优选育,国内研究报道较少。我们于1987年从美国引种了胞质型雄性不育系NY7642A和保持系NY7642B,经过3年的回交提纯,已获得不育率达98％以上的稳定不育系,并与国内的中熟花椰菜品种试配杂交组合,初步选育出“榕花一号”和“榕花二号”两个杂种一代;其杂种优势十分明显,主要表现为生长势强、花球产量高、抗霜霉病和黑腐病能力强等方面。一、主要特征特性(一)主要特征(1)“榕花一号”:整齐度高、成熟期集中、定植后80天采收。 Cauliflower hybrid breeding, domestic research reports less. We introduced the cytoplasmic male sterile line NY7642A and the maintainer line NY7642B from the United States in 1987. After three years of backcross purification, we have obtained stable male sterile lines with a sterility rate of more than 98% The hybrid combinations of cauliflower cultivars were preliminarily bred for two hybrid generations of “Yunghua No.1” and “Yunghua II”. The heterosis was very obvious, mainly showing the strong growth potential, high yield of flower bulbs, Illness and black rot ability and so on. First, the main features (a) of the main features (1) “Ficus a”: uniform high, mature stage of concentration, harvesting 80 days after planting.