晚粳稻耐旱突变体的耐旱性分析  

DROUGHT STRESS TOLERANCE ANALYSIS OF A JAPONICA RICE MUTANT

作　　者：鲍根良[1] 左晓旭 王俊敏 骆荣挺[1] 陶荣祥[1] 郑涛 

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

出　　处：《核农学报》2006年第4期269-272,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(011102471)";"浙江省04-06水稻品种改良";浙江省重点"节水耐旱型晚粳稻新品种选育研究(2005C22028)"项目

摘　　要：在海南和杭州两地分别对晚粳稻耐旱突变体G1、原亲本浙粳20及旱稻对照巴西陆稻IAPAR-9进行耐旱性比较试验。结果表明,G1旱后再生能力明显强于亲本浙粳20和巴西陆稻IAPAR-9,表现为再生苗发生早,总再生苗数占干旱处理前总分蘖数的比例高。在干旱胁迫育秧处理时,G1最长根长、根茎长比及单苗干鲜重比显著大于亲本浙粳20,其差异达显著或极显著水平;与巴西陆稻IAPAR-9比较,G1最长根长稍短,但根茎长比和单苗干鲜重比明显大。The difference of drought tolerance among Japonica rice mutant G1, its parent Zhejing 20 and Brazil upland rice IAPAR-9 （control variety of upland rice） was studied in Hainan and Hangzhou, respectively. The resuhs showed that G1 had obviously stronger ratoon ability after drought stress compared with Zhejing 20 and IAPAR-9, such as earlier-occuring of ratoon tiller, higher ratio of total ratoon tillers compared with total tillers before treatment. In seedbed drought stress treatment, G1 expressed significantly or much significantly longer at the longest roots （LR）, larger at root-stem length ratio （RSLR） and dryfresh weight ratio of single seedling （DFWRSS） than Zhejing 20. Furthermore, G1 expressed obviously larger at RSLR and DRWRSS but slightly shorter at LR than IAPAR-9.

关 键 词：晚粳稻 辐射诱变 突变体 耐旱性 根系 

分 类 号：S511.22[农业科学—作物学]