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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。
In this experiment, drought-tolerant materials were used as drought-tolerant materials, ’Hangyou No.3’ and ’Hangyou No.8’, and ’Zhenshan 97B’ as a drought-sensitive material respectively. Through repeated drought treatment at seedling stage, five drought resistances of SPRDC, PH, LFC, REL and MDA were measured. Related morphological and physiological traits. The fuzzy membership function (FSV) average of five indicators was taken as D value of comprehensive drought resistance identification index. According to D value of control material as grading point, drought resistance of imported resources in Burma was divided into four levels: anti-drought, mid-resistance, mid-flu and flu-resistance. All the drought-resistant materials were identified as anti-drought materials. The results showed that these 18 drought-resistant resources could be used as genetic resources for improving drought-resistance of cultivated rice.