【摘要】 特棉S-1是一个新发现的高温敏感型雄性不育材料.体外花粉培养试验表明,在15,20,25,30,35,40℃处理中,特棉S-1花粉萌发率和花粉管长度均低于对照苏棉16;特棉S-1的花粉萌发率和花粉管长度最高值为37%和450μm,而对照苏棉16分别为51.8%和682μm,差异达极显著水平.细胞学观察发现,受到高温的影响,花粉母细胞不能形成和减数分裂发生异常不能发育成正常四分体是特棉S-1雄性不育发生的主要原因.更多还原

【Abstract】 The cotton line TemianS-1 was a recently developed male sterility sensitive to high temperature.In vitro study showed that pollen germination and pollen tube length of TemianS-1 were less than that of Sumian16 under all temperature treatments(15,20,25,30,35,and 40 ℃).The maximum pollen germination and pollen tube length of TemianS-1 were 37% and 450 μm,respectively,and significantly lower than that of Sumian16(51.8% and 682 μm).Under high temperature conditions,the pollen female cells were not formed in anthers in a few young buds and normal tetraspores were hardly developed after meiosis processes in most young buds,which was the main reason for male sterility of TemianS-1.更多还原