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在1989～1990年两年试验的基础上,对19个早籼和8个早粳高产品种的193个性状的育种值进行了逐步回归和通径分析。结果表明:1) 早籼高产品种共有谷草比、草株生物产量、成熟时绿叶剩存率、蜡熟期剑叶胞间CO_2浓度等10个理想型性状,由这10个理想型性状建立的回归方程其预测准确率均在93.87%以上且X~2测验效果好;2) 早粳高产品种共有移栽时最大叶长、主茎倒二节间直径等7个理想型性状,由这7个理想型性状建立的回归方程其预测准确率均达97.47%以上,且x~2测验效果好:3) 有3个理想型性状的广义遗传力高(>0.92),其它理想型性状的广义遗传力均为中等(0.50～0.76)。就几个特别重要的理想型性状对产量的作用机理进行了讨论。
Based on the two years of experiments from 1989 to 1990, the breeding values of 193 traits of 19 early indica rice and 8 early japonica high yield cultivars were gradually regressed and path analyzed. The results showed that: 1) The 10 high-yielding indica rice cultivars had 10 ideal traits, such as the ratio of total to straw, biomass of plant, leafy green leaf rate at maturity, The prediction accuracy of the regression equation was over 93.87% and the test results of X ~ 2 were good. 2) There were 7 ideal traits, such as the maximum leaf length at transplanting and the diameter between two internodes, The prediction accuracy of the regression equations established by the ideal traits was above 97.47%, and the test results of x ~ 2 were good: 3) The generalized heritability of three ideal traits was high (> 0.92), and the generalized other ideal traits Heritability is moderate (0.50 ~ 0.76). The mechanism of action of several particularly important ideal traits on yield is discussed.