Observation on fertility of photo-thermo sensitive genic sterile male rice line “Fulong S2”

A trial of sowing by different stages was carried out with rice “Peiai64S” as control in order to analyze fertility and characteristics of photo-thermo sensitive genic sterile male rice line “Fulong S2”. The results showed that sowing duration of “Fulong S2” from initial date was 86-89 days. Its steady sterile period appeared since July 20. It had good flowering habit and strong stigma vigor. Its blooming rate before noon reached over 70%. It had high rate of extruded stigma and rate of unilateral extruded stigma was higher than that of bilateral. The outcrossing seed-setting rate of “Fulong S2” was higher than that of “Peiai64S”.