摘要
以22个晚釉和14个晚粳高产品种为材料,考察测定了193个性状。在方差分析的基础上根据性状育种值进行了逐步回归分析和通径分析。结果表明:晚釉高产品种共有主茎倒二节间直径、灌浆中期百粒日增重、谷草比、黄熟期绿叶指数等10个理想型性状;晚粳高产品种共有成熟时剑叶实长、全生育期、抽穗期单株根千重等10个理想型性状。由此理想型性状所建立的晚籼、晚粳优化回归方程x^2测验效果极佳,且对每个参试品种产量的预测准确率均在93.25%以上。
193 characteres of 22 late indica and 14 late japonica high-yield varieties weremeasured in this study. Stepwise regression and path analysis were conducted based onbreeding values of characteres after variance analysis. The results indicate: there are all 10optimal characteres such as diameter of the second internode from the top in main stem, dailyincreasing weight of 100 grain in the middle stage of the milking, grain to straw ratio, greenleaf index in complete ripeness stage in late indica high-yield varieties. There are all 10optimal characteres such as flag leaf length in ripeness stage, the whole growing stage, dryroot weight per plant in heading stage in late japonica high-yield varieties. The forecastcorrectness rates of the excellentest regyession equation set up based on above optimalcharacteres in late indica and late japonica are all above 93.25% and the effect of the test ofx^2 are very good. the action mechanism of the important optimal characteres especially upongrain yield are also discussed
基金
国家自然科学基金
关键词
水稻
晚稻
经济性状
株型
产量
lowland rice
late rice
economic characters
plant types
yield/optimal character
