Abstract:The fertility transformation of 12 lines of photoperiod/temperature--sensitigenie male-sterile rice(P/TGMR)in Guangzhou and their responses to variousphotoperiod and temperature treatments were studied. Experimental results showed that allvarieties possessed a sterile period at natural condition in Guangzhou, but the stability andduration of sterility were different among 7001s, N5088s, Nongken58s, 8902s, 8912s,W6154s,W8013s,Petai64s, KS-14,KS-9, W6184s and W6111s. Fertility of W6111s andW6154s was more fluctuated in the sterile period as compared with other sterile lines. Thefertility of 7001s, N5088s, Nongken58s and 8902s were higher than that of others in lateseason. Nine sterile lines showed first fertility transformation from fertility to sterility inearly season and second fertility transformation from sterility to fertility in late season.No obvious fertility transformation was observed in KS-14 during both seasons.According to the results by various photoperiod and temperature treatments, it is proposed that 700is,N5088s,8902s,Nongken58s and 8912s belonged to PGMR(photoperiodsensitive genie male sterile rice),but the degree of their fertility restoration was slightly related to temperature under short day-light.W6154s,W8013s,Petal64s and KS-14belonged to TGMR(thermasensitive genie male sterile rice), and the sensitive temperature fromsterility to fertility was different,it was 24-27℃ for W6154s and W8013s, and 21-24℃for KS-14 and Peiai 64s.
