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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。
With 22 late glaze and 14 late japonica cultivars as materials, 193 traits were determined. On the basis of analysis of variance, stepwise regression analysis and path analysis were carried out based on breeding values of traits. The results showed that there were 10 ideal traits such as the diameter of the internode between the two internodes, the daily gain of 100 grains per day in the mid filling stage, the ratio of grain to straw and the green leaf index in the yellow ripening stage. The whole growth period, heading one thousand roots and other 10 ideal traits. The late indica rice and late japonica optimized regression equation x ~ 2 test established by this ideal trait is very good, and the prediction accuracy of yield for each test variety is above 93.25%.