大白菜等十字花科蔬菜杂种优势极为显著,但由于花器小等原因,难以直接用人工去雄杂交法制种,而利用雄性不育系则是十分有效的途径。我们经四年育成的运农1号雄性不育两用系,属雄蕊不育型,花药花丝严重退化萎缩,为遗传稳定的全不育,具有较多的优良经济性状和较高的配合力,是大白菜杂优利用的一个很有价值的材料。一、选育经过本不育系原始材料是1979年在运城地区大白菜主栽品种运农1号中发现的天然雄性不育株。当代在不育株上标记,任其自然授粉,不育株上采种,秋季进行经济性状选 Chinese cabbage and other cruciferous vegetables heterosis is extremely significant, but due to the small flowers and other reasons, it is difficult to direct artificial hybrids to the law of the male, and the use of male sterile lines is a very effective way. Our four-year-breeding Yunnong 1 male sterility dual-purpose line belongs to the sterile type of stamen. The anther filaments seriously degrade and atrophy, which is genetically stable and sterile, with more excellent economic traits and higher combining ability , Is a valuable Chinese cabbage hybrid materials used. First, the selection of the sterile material through the original material is 1979 in Yuncheng area of ​​Chinese cabbage cultivar Yunnong 1 found in natural male sterile plants. Contemporary sterile plants marked, let their natural pollination, sterile plants in the collection, the economic character of autumn election