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用温敏核不育水稻N8S作工具,选用长江流域早籼品种怀早4号、香2B和早优1号做材料,在兼顾综合性状的基础上,对温敏核不育水稻柱头外露率进行群体改良研究.结果表明,不同群体改良方法对水稻柱头外露率的改良效果不同.二次随机多交的改良效果最好;一次随机多交后混合选择的效果次之;单纯混合选择的效果最差.柱头外露率、包颈率和闭颖率3个异交习性都较理想的单株的频率以2次随机多交群体最高;1次随机多交后的混合选择群体次之;单纯混合选择群体最低.
Using the thermo-sensitive genic male sterile rice N8S as a tool, early indica rice varieties Hua-Zao 4, Xiang-2B and Zaoyou 1 in the Yangtze River were selected as materials. Based on the comprehensive characters, the stigma exsertion rate The results showed that the improved methods of different groups improved the stigma exsertion rate of rice differently, the second randomization had the best improvement effect, the second was random selection and mixed selection was the second, the effect of simple mixed selection And the lowest frequency of stigma exsertion, neck-in and closed-clobber rate were the highest in two randomized multi-crossover population, followed by the mixed population after one randomized multi-crossover population. Mixed Choose the lowest group.