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用模型Yij=μi+ βiIj+δij来分析优质蛋白玉米杂交种在多个环境下产量的稳定性 ,其中Yij表示第i个品种在第j个环境下产量的模拟值 ,μi表示第i个品种在所有环境下产量的平均值 ,βi 表示第i个品种的产量对环境指数的回归系数 ,δij是第i个品种的产量对第j个环境指数的回归离差 ,Ij 表示第j个环境的环境指数。用来自一套由 11个优质蛋白玉米杂交种组成的多点试验的产量数据 ,分析每一个品种产量的稳定性。这批杂交种产量的稳定性表现在产量对环境指数的线性回归 ,其中有 2个品种 (Q - 11,Q - 45 )的产量对环境指数的回归系数 (b)与b =1的差异显著 ;4个品种的产量对环境指数的回归离差均方值 (Sd2 )接近于 0 ,而其他品种产量的Sd2 和Sd2 =0的差异达到显著水平。
The model Yij = μi + βiIj + δij was used to analyze the stability of the yield of high-quality protein maize hybrids in a variety of environments, where Yij is the simulated value of the ith species in the jth environment, μi is the i- Βi denotes the regression coefficient of the yield of the ith species to the environmental index, δij is the regression deviation of the yield of the ith species to the jth environmental index, Ij denotes the environment of the jth environment index. The stability of each variety was analyzed using yield data from a multi-point trial of 11 high-quality protein maize hybrids. The stability of the yield of these hybrids showed a linear regression between yield and environmental index. Among them, the regression coefficients (b) and b = 1 of the yield of two varieties (Q - 11, Q - 45) ; The regression equation of Sd2 of four cultivars to the environmental index is close to 0, while the difference of Sd2 and Sd2 = 0 of other cultivars reaches significant level.