【摘要】 为探讨生态雄性不育小麦的育性转换特性 ,在长沙自然气候条件下 ,通过分期播种对生态雄性不育小麦ES- 5 0育性转换特性进行了初步研究 .结果表明 ,ES- 5 0是一个有明显育性转换特性的生态雄性不育系 ,早播不育 ,晚播可育 ;育性转换的临界温度约为 13℃ ,育性转换的温度敏感期为抽穗前 2 1～ 13 d更多还原

【Abstract】 The mechanism of fertility alteration of ecological male sterile ES 50 was studied by means of different sowing dates experiment under natural climate conditions in Changsha.The results are as follows:ES 50 has evident characteristic of fertility transformation,ie, sterility when ealier sowed and fertility while later sowed .The critical temperature of ES 50 is at about 13 ℃ and the thermo sensitive phase is 21~13 d before heading.更多还原