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在海南南部三亚、北部海口和中部五指山3个生态点,对水稻光温敏核不育系P88S进行周年分期播种试验,研究P88S在海南自然光温条件下的育性转换特性。结果表明:P88S在海南5月上旬至10月中旬抽穗具有稳定的不育期,在此时期制种育性安全可靠;在中部五指山地区的2月中旬至4月中旬和11月上旬至12月上旬抽穗具有稳定的可育期,并且自交结实率高,繁殖安全可靠。
In the three ecological sites of Sanya, northern Haikou and Wuzhishan in southern Hainan, the annual photosynthesis of P88S was studied in the light-thermo-sensitive genic male sterile line P88S. The fertility transformation of P88S under natural light and temperature in Hainan Island was studied. The results showed that: P88S had a stable sterile stage during heading from May to mid-October in Hainan during which period the fertility was safe and reliable. From mid-February to mid-April and early November to December in the Wuzhishan area of Central China, Early heading has a stable fertile period, and selfing seed set rate is high, safe and reliable reproduction.