在人工控温和田间自然变温条件下 ,研究了结球白菜 (BrassicacampestrisL .ssp .penkinsis)胞质雄性不育系CMS7311育性转换的温度特征。结果表明 :随温度变化CMS7311有明显的育性转换 ,人工恒温和人工变温条件下诱导CMS7311发生育性转换 (不育→可育 )的温度范围为日均温 6～ 12℃ ,有效诱导的最短时间为 3d ,显著诱导的温度范围为 6～ 9℃。自然变温条件下 ,有效诱导的温度低限为日均温 3 5～ 6 8℃ ,但诱导育性转换的最短时间要适当加长。无论恒温还是变温 ,在日均温 9℃下处理 9d育性转换达到最大 ,接近正常可育 (0级或 1级 )。正常情况下 ,温度处理后到发生育性转换大约需要 10～ 16d ,育性转换发生在孢原细胞形成至花粉分化阶段。由于白菜生长的顶端优势作用 ,在相同诱导条件下 ,同一植株侧枝较主枝的育性转换时间晚 8～ 10d ,且转换程度较弱 Under the conditions of artificial temperature control and field temperature change, the temperature characteristics of fertility transformation of CMS7311, a Brassica campestris L.ssp .penkinsis strain, was studied. The results showed that CMS7311 had a significant fertility transition with temperature. The temperature range of CMS7311 fertility transformation (sterile → fertile) induced by artificial temperature and artificial temperature was 6 ~ 12 ℃, the shortest effective induction period The time is 3d, the temperature range of 6 ~ 9 ℃ induced significantly. Under the condition of natural temperature change, the lower limit of effective temperature is 35 ~ 68 ℃, but the shortest time to induce fertility transformation should be lengthened properly. Regardless of the isothermal or variable temperature, the fertility transformation reaches its maximum at 9 day average daily temperature at 9 ℃, which is close to the normal fertility (Grade 0 or Grade 1). Under normal circumstances, the fertility conversion takes about 10 ~ 16 days after temperature treatment, fertility conversion occurs in the formation of pollen cells to pollen differentiation stage. Due to the apical dominance of cabbage growth, under the same induction conditions, the fertility conversion time of the same plant was longer than that of the main plant, and the degree of transformation was weak