粳稻耐旱突变体的诱发与鉴定  

INDUCTION AND IDENTIFICATION OF DROUGHT TOLERANCE FOR Japonica RICE

作　　者：鲍根良[1] 左晓旭 王俊敏 骆荣挺[1] 陶荣祥[1] 富田桂[3] 小林麻子[3] 

机构地区：[1]浙江省农业科学院,浙江杭州310021 [2]浙江省杭州市余杭区种子技术推广站,浙江余杭311100 [3]福井县农业试验场

出　　处：《核农学报》2005年第5期332-335,共4页Journal of Nuclear Agricultural Sciences

基　　金：浙江省重大攻关"优质专用水稻新品种选育与产业化项目(011102471)";中日合作"水稻遗传资源的特性评价与利用"项目

摘　　要：采用60Coγ射线200Gy辐照处理晚粳稻品种“浙粳20”纯系干种子,在其后代发现2个粳稻耐旱突变体G1和G2。经(生殖生长期)海南和杭州(营养生长期)耐旱性鉴定,2个突变体耐旱性明显优于原亲本“浙粳20”,也优于巴西陆稻“IAPAR-9”。普通灌溉栽培条件下的农艺性状测试表明,2个突变体对水陆环境具有较好的双重适应性。G1综合性状优良,可直接应用于生产,G2产量偏低,可作为新的优质耐旱种质利用。The pure dry seeds of “Zhejiang 20” was treated by 200Gy ^60Co γ-ray. Two mutants G1 and G2 were identified and selected through 6 generation. The two lines showed significantly higher drought tolerance than their parent “Zhejiang 20” at vegetative growing stage in Hangzhou; and moderately higher than Brazil upland rice “IAPAR-9” at reproductive growing stage in Hainan. It also demonstrated from the separate field tests that two lines performed very well and have a very good adaptability in both paddy and upland-soil. The high yielding line G1 can be applied directly in yield rice breeding, while the relatively low yielding line G2 could be used as a new source of drought tolerance in future breeding programs.

关 键 词：晚粳稻 耐旱性 辐射诱变 突变体 耐旱性鉴定 粳稻品种 诱发 ^60CO 营养生长期 生殖生长期 

分 类 号：S511.22[农业科学—作物学]