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以4个光敏核不育系为母本,12个粳稻和爪哇稻品种为父本,用4×12不完全双列杂交法组建成轮回选择的基础群体S_(89)。1989～1992年夏季在武昌考察了S_(89)及第1、2、3轮改良群体S_(89)S_(91)及S_(92)。结果表明:各轮异交群体中88%以上的植株于武汉地区粳型光敏核不育水稻的稳定不育期内(即7月中旬至9月1日以前)抽穗。各轮异交群体内均出现不育、部分不育和可育株的育性分离。各轮异交群体中不育株的平均异交结实率为17.2%～5.9%。第1轮改良群体S_(90)的单株理论产量比基础群体S_(89)提高了0.8%。实验结果说明光敏核不育性用于水稻轮回选择是可行的。
Four photoperiod-sensitive male sterile lines were used as the female parent, and 12 japonica and Javanese rice cultivars were used as the male parent. The basic population of recurrent selection was established by 4 × 12 incomplete double-line hybridization. In the summer of 1989 ~ 1992, S89 (89) and S89 (89) S91 and S92 (92) of the first, second and third round improved group were investigated in Wuchang. The results showed that more than 88% of the plants in each round of heterosis were heading in stable sterile stage (from mid July to September 1) in Wuhan. In each round of outcrossing population, sterile, partially sterile and sterile fertility segregation occurred. The average outcrossing rate of sterile plants in each round of cross-breeding population was 17.2% ~ 5.9%. The theoretical yield per plant of the first improved population S_ (90) was 0.8% higher than that of the basic population S_ (89). The experimental results show that it is feasible to use photosensitive nuclear sterility in the reincarnation of rice.