气温对不结球白菜低温敏感型胞质雄性不育性的影响

Effect of Atmospheric Temperature on Male Sterility of Cytoplasm Sensitive to Low Temperature in Non-heading Chinese Cabbage

甘蓝型油菜POL细胞质雄性不育源在十字花科蔬菜雄性不育转育中普遍存在对低温敏感的难题[1,2,3]。本试验拟研究不结球白菜POL雄性不育性受气温影响的变化规律、影响的临界温度、低温影响至育性表达的时间,同时筛选对低温敏感程度低的胞质雄性不育系,确定适宜的播种期,为该...

Chinese cabbages with POL cytoplasmic male sterility( CMS) were sown at different dates in 1 992— 1 995 to study the effect of atmospheric temperature on their sterility.Materials used in this experiment could be classified into threetypes,the lightsensitivity to low temperature,the medium sensitivity to low tempera ture and the high sensitivity to low temperature.Thecriticalvaluesofdaily mean temperature were 1 0℃ ,1 3℃ and 1 6℃ respectively and the criticalvalues ofthe daily lowesttemperature were 5℃ ,8℃ and 1 2℃ respectively.Inter valbetween the temperature influence and the fertility expression ofthe CMS was about1 0— 1 2 days.The sterile plantrate and sterile degree ofthese materials sown after Dec.5 stably reached 1 0 0 %and 95 %ormore.Two CMS lines of Chinese cabbage A3 and A1 1 were obtained in this study.