Study on Mutagenic Effect of Space Flight in Two-line Sterile Rice  

卫星搭载处理两系不育水稻诱变效果的研究(英文)

作　　者：杨震[1] 彭选明[1] 彭伟正[1] 庞爱军[1] 庞伯良[1] 

机构地区：[1]湖南省原子能农业应用研究所,湖南长沙410125

出　　处：《Agricultural Science & Technology》2009年第4期105-107,174,共4页农业科学与技术（英文版）

基　　金：Supported by The Ministry of National Agricultural Special PublicSector Research "Nuclear Technology Application in Agriculture"(No.200803034);Science and Technology Innovation Projects ofHunan Academy of Agricultural Sciences(2009hnnkycx13);the National Science&Technology Pillar Program in the Eleventh Five-year Plan period(2008BAD7B02)~~

摘　　要：Seeds of two-line sterile rice cultivars Zhu 1S and Lu 18S were carried into space by ＂Shijian 8＂ breeding recoverable satellite, then planted in ground. Mutagenic effects from space induction were compared with those from y-irradiation and complex processing of space induction and y-irradiation. The results showed that agronomic effect was stimulated in Mo progenies of the two-line sterile rice varieties treated by space flight, and their radiosensitivities to the irradiation of space flight performed non-sensitive. The order of mutation frequency was determined to be SP ＋ γ 〉 γ 〉 SP in M2 generation. And a series of mutated elites（individuals） were screened. Physiological indices of mutants screened like the activity of protective enzymes were measured to explore the physiological and biochemical basis of biological effect in space environment to two-line sterile rice. The results of this study show that space mutation breeding is an effective novel mean for breeding.2个两系不育水稻品种种子(株1S、陆18S)经"实践八号"育种卫星搭载,返回地面种植,并与60Co-γ单独和60Co-γ与卫星搭载复合诱变处理进行比较。研究结果表明:卫星搭载对当代两系不育水稻农艺性状有刺激作用;2个两系不育水稻品种对卫星搭载处理辐射敏感性均为不敏感;M2代突变频率均为SP+γ>γ>SP,并从中筛选出一批优良变异单株。同时对M2代中筛选出的特殊变异株进行了保护酶活性等生理指标的测定,以探求太空环境对两系不育水稻生物学效应的生理生化基础。结果表明卫星搭载诱变处理水稻种子是一种切实可行的育种新途径。

关 键 词：Space flight y-irradiation Complex process Two-line sterile variety Mutagenic effects 

分 类 号：S511[农业科学—作物学]