自然生态法鉴定水稻光温敏核不育系雄性不育起点温度的研究

Studies on Identifying the Critical Sterility-inducing Temperature of PTGMS Lines in Rice with Ecological Method of Nature

本试验是将 8个新水稻光温敏核不育系置于湖南怀化进行分期播种 ,让其在自然条件下充分表现 ,以选育出雄性不育起点温度低、育性稳定、综合农艺性状好、易于繁殖制种的水稻光温敏核不育系。结果表明 :糯S、粳 3 8S、C40S、9771S、德早S、H15 5S、怀 4S雄性不育起点温度在 2 3 5℃左右 ,而德es雄性不育起点温度在 2 3 5℃～ 2 4℃之间。文章对水稻光温敏核不育系鉴定方法进行了探讨。

New PTGMS(photoperiod-and-thermo-sensitive genic male sterile)rice lines C40S,JING38S,LUOS,9771S,DEeS,DEZAOS,HUAI4S and H155S were planted in turn in hunan huaihua.The fertility of them under the conditions of natural ecology were investigated.The results indicated that the CSIT(critical sterility-inducing temperature)of LUOS,JING38S,C40S,9771S,DEZAOS,HUAI4S and H155S are about 23.5℃,but the CSIT of DEeS is between 23.5℃ and 24.0℃.The identifying have discussed in this paper.