4个水稻光温敏核不育系在海口的育性表现

Study on the Characteristic of Fertility of 4 Photo-thermo-sensitive Genetic Male Sterile Lines in Haikou

对水稻光温敏核不育系培矮64S、准S、P88S和Y58S进行分期播种,连续观察其花粉育性和自交结实率,研究这些不育系在海口地区的生育特性和育性表现。结果表明,培矮64S不育性在5月下旬至10月下旬表现稳定,育性温度敏感期在抽穗前的10～25d;准S在5月15日至10月16日不育性表现稳定,育性温度敏感期在抽穗前的5～15d和19～22d;P88S从5月11日至10月18日不育性稳定,其育性温度敏感期在抽穗前的5～15d和18～22d;Y58S在5月5日至10月20日不育性表现稳定,其育性温度敏感期在抽穗前的7～11d。

In the report, 4 photo-thermo-sensitive genetic male sterile （PTGMS） lines, Peiai64S, ZhunS, P88S and Y58S were analyzed by sowing data treatment in Haikou, and the fertility performance was determined by observing the percentage of pollen fertility and seed-setting on the bagged panicles. The results showed that the fertility of Peiai64S was stable from mid-May to late-October, and the temperature sensitive periods （TSP） was 10—25 d before heading; the fertility of ZhunS was stable from May 15th to Oct. 16th, and the TSP was 5—15 d and 19—22 d before heading; the fertility of P88S was stable from May 11th to Oct. 18th; and the TSP was 5—15 d and 18—22 d before heading; the fertility of Y58S was stable from May 5th to Oct. 20th; and the TSP was 7—11d before heading.