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选用来自全国不同育种单位的各种类型光温敏核不育水稻材料,在海南省进行周年播种,对育性转换进行观测.试验表明,育性转换不同光温反应类型的品系在海南的育性转换存在很大差异,而同类不育系则表现了相同的转换趋势.其中育性转换可育上限温度高的高—低型和高—高型不育系在海南没有明显的全不育期.而育性转换可育上限温度低的低—低型和低—高型不育系在海南有明显的育性转换.由此,作者提出,低—低型和低—高型不育系在海南可以作为不育系用于水稻杂种优势利用;低—低型不育系可以考虑在海南繁殖;在海南冬繁时,可利用海南的短日高温选择压力,进行不育系较高上限温度的选择.
All kinds of photosynthetic thermo-sensitive genic male sterile rice materials from different breeding units in China were selected and sown annually in Hainan Province for observation of fertility conversion.The results showed that fertility conversion of different types of photosynthetic light-heat-sensitive lines in Hainan The results showed that there was a great difference in sexual transformation, while the same type of CMS showed the same transformation trend.However, there was no obvious total sterility in high-low type and high-high type sterile lines with fertile upper fertile upper high temperature However, the low fertility and low fertile upper low-fertility low-low and high-low sterile lines in Hainan have significant fertility conversion.Thus, the authors propose that low-low type and low-high type of infertility Can be used as a sterile line in Hainan for the utilization of rice heterosis; low-low sterile line can be considered breeding in Hainan; in Hainan winter Fan, Hainan can be used to select short-day high temperature pressure, higher sterile lines The maximum temperature of choice.