籼型光敏核不育系W9451S的选育和光温反应特性研究  

Development of Indica PGMS Line W9451S and Studies on itsCharacteristics Response to Photoperiod and Temperature

作　　者：牟同敏[1] 卢兴桂[1] 李春海[1] 袁潜华[1] 杨国财[1] 万炳良 马霓[1] 费震江[1] 

机构地区：[1]湖北省农业科学院粮食作物研究所

出　　处：《高技术通讯》1996年第12期42-45,共4页Chinese High Technology Letters

基　　金：863计划资助

摘　　要：１９９１年用８９０２Ｓ与金红２３１－８配组，后经高海拔长日低温、低海拔短日高温和人工气候室长光低温的交叉选择和鉴定，于１９９５年育成了籼型光敏核不育系Ｗ９４５１Ｓ。在武汉自然条件下，７月中旬至８月底为稳定不育期，大群体的遗传性稳定，花粉和自交不育度达９９．５％以上。经４个实验室的人工气候箱鉴定，育性转换的临界温度＜２４℃，育性具明显的光敏感特性，光敏温度范围为２３—２９℃。９月上、中旬转为可育，自然结实率为２０．３８—４４．６８％。３月２５日至７月１４日分期播种表明，播始历期１００—６７天，主茎叶片数为１５．６—１３．４片，生长发育弱感光、属长江流域的早熟中籼稻。开花顺畅，柱头外露率为５４．５４％。S was crossed with Yu-hong 231-8 in 1991. Throush selecting and identifying under long-day/lower temperature at higher altitude, short-day/higher temperture at lower altitude and long-light/lowertemperature in artificial room from 1992 to 1994, an indica photoperiod-sensitive genic male sterile line,W9451S, was developed in 1995. Its stable sterile period is from mid-July to late August at Wuhan. Thesterility of pollen and spikelet was over 99. 5%. Results identified in 4 laboratoies in 1995 indicated thatthe critical temperature of fertility alteration was lower than 24℃ with significant response to photoperiod.The temperature sensitive to photoperiod ranges from 23℃ to 29℃. W9451S were fertile during early andmid-September at Wuhan, and its seed set ranged from 20. 38% to 44. 68%. Days from seeding (25March to 14 July) to heading were 100-67 with 15. 6-13. 4 bldes on main stem. The stigma exertionwas 54. 54 %.

关 键 词：光敏核不育系 选育 光温反应 水稻 

分 类 号：S511.21[农业科学—作物学]