缅甸引进稻种资源苗期抗旱性鉴定  

Evaluation of drought resistance on the rice germplasms introducted from Myanmar at the seedling stage

作　　者：杜家会[1,2] 董超[2] 汤翠凤[2] 徐福荣[2] 张斐斐[2] 杨雅云[2] 张恩来[2] 阿新祥[2] 戴陆园[2] 

机构地区：[1]云南农业大学农学与生物技术学院,云南昆明650201 [2]云南省农业科学院生物技术与种质资源研究所,云南省农业生物技术重点实验室,农业部西南作物基因资源与种质创制重点实验室,云南昆明650223

出　　处：《浙江农业学报》2012年第5期764-770,共7页Acta Agriculturae Zhejiangensis

基　　金：科技部科技对外援助项目;农业部资助项目(2011G109);云南省科技创新强省计划项目(2007C0219Z)

摘　　要：本试验分别以‘旱优3号’、‘旱优8号’为抗旱对照材料,‘珍汕97B’为敏旱对照材料,对160份缅甸引进稻种进行苗期抗旱性鉴定。通过苗期反复干旱处理,测定反复干旱存活率(SPRDC)、苗高(PH)、心叶下倒一叶叶长(LFC)、相对电导率(REL)、丙二醛(MDA)5个抗旱相关的形态及生理性状。以5个指标的模糊隶属函数(FSV)平均值作为抗旱综合鉴定指数D值。以对照材料D值为分级点,将缅甸引进资源抗旱性分为抗、中抗、中感、感4个级别,将所有指标鉴定结果都为抗的定为抗旱材料,得到18份抗旱材料。结果表明:这18份抗旱资源可作为栽培稻抗旱改良的遗传资源。To evaluate the drought-resistance of 160 varieties introduced from Myanmar at seedling stage, Hanyou No. 3, Hanyou No. 8 were used as drought-resistant varieties but Zhenshan 97B as drought-sensitive variety in this study, respectively. Five drought-resistance indexes including survival percentage under repeated drought conditions, plant height, length of the fist leaf under central leaf, relative electrolyte leakage and malondialdehyde content under repeated drought conditions at seedling stage have been measured. Comprehensive appraisal index （ comprehensive D values） was the five index of fuzzy subordinate-function（FSV） average. The drought resistance of resources introduced from Myanmar was classified into 4 levels of resistance, moderate resistance, moderate sensitivity, sensitivity accroding to D values of the control. And 18 materials with drought-tolerance were screened, which indicated the 18 materials can be used as breeding resources to improve the drought resistance of cultivated rice.

关 键 词：缅甸 水稻 苗期 反复干旱法 模糊隶属函数 

分 类 号：S511[农业科学—作物学]