光（温）敏核雄性不育水稻在广州的育性表现及光温反应特性研究

FERTILITY EXPRESSION OF PHOTOPERIODTEMPERATURE-SENSITIVE GENIC MALE-STERILERICE IN GUANGZHOU AND THEIR RESPONSE TOPHOTOPERIOD AND TEMPERATURE TREATMENTS

对１２个光（温）敏核雄性不育水稻在广州的育性测定表明：１２个不育系在夏季都有一个不育期，但不育性稳定程度不尽相同，以Ｗ６１１１ｓ和Ｗ６１５４ｓ育性波动较大．其中９个不育系在早晚季各有一个长短不一的可育期，ＫＳ—９仅见第二可育期，ＫＳ—１４则未见可育期．在晚季，７００１ｓ，Ｎ５０８８ｓ，农垦５８ｓ和８９０２ｓ可育恢复较好，可育期明显，而其余７个不育系仅能部分恢复正常．光温处理表明：７００１ｓ，Ｎ５０８８ｓ，８９０２ｓ，农垦５８ｓ和８９１２ｓ为光敏型，长日条件下不育性受温度影响不大，但短日条件下不育性恢复程度与温度有一定关系．Ｗ６１５４ｓ和Ｗ８０１３ｓ，培矮６４ｓ，ＫＳ—１４和ＫＳ—９为温敏型．Ｗ６１５４ｓ和Ｗ８０１３ｓ转育起始温度在２４—２７℃间，ＫＳ—１４和培矮６４ｓ则在刀一２４℃间．

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.