水稻光敏不育临界日长估值的研究  

Study on Estimated Values of Critical Photoperiod for Sterility in PGMS Rice

作　　者：薛光行[1] 陈平[1] 陈长利[1] 

机构地区：[1]中国农业科学院作物育种栽培研究所

出　　处：《中国农业科学》1998年第3期19-24,共6页Scientia Agricultura Sinica

摘　　要：水稻光敏不育临界日长（包括诱导败育临界日长ＳＤｘ和完全不育临界日长ＬＤｘ）值随环境温度而变化。当日平均气温由２７．６℃下降至２５．１℃时，农垦５８ｓ的ＬＤｘ由１３．８ｈ增加到１４．５ｈ，每降温１℃约增加０．２ｈ以上；参试农垦５８ｓ、Ｎ５０８８ｓ和７００１ｓ在２５．１℃的ＳＤｘ约１３．０ｈ，ＬＤｘ约１４．５ｈ；在２３．６℃低温下栽培的同一光敏不育水稻的样本内个体的ＬＤｘ值不一致。笔者就光敏不育临界日长值的选择方向问题进行了讨论。The fertility conversion controlled by photoperiods is a characteristic behaviour of the photoperiodic sensitive genic male sterile (PGMS) rice.Their estimated values of critical photoperiod,SDx—critical photoperiod keeping a nearly normal male fertility and LDx—critical photoperiod evoking a complete male sterility,both are susceptible to temperature levels and fluctuate.The LDx value increase from 13.8h to 14.5h along with a temperature (Tm.) decrease from 27.6℃ to 25.1℃ in Nongken58s.Its rate of changes was above 0.2h/1℃.It was at 25.1℃ that the values of SDx and LDx were about 13.0h and 14.5h respectively in Nongken58s,N5088s and 7001s.The individual records of LDx value at 23.6℃ were also variational in each sample of the 3 genic male sterile lines tested. A discussion was made on the favorable selection criterion concerning the critical photoperiod value in breeding.

关 键 词：水稻 雄性不育 光周期 临界日长 温度 

分 类 号：S511.01[农业科学—作物学]