摘要
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, Y ij = μ i + β iI j +δ ij , defines the stability parameters that may be used to describe the performance of a variety over a series of environments.In the model, Y ij represents the variety mean of the i th variety at the j th environment, μ i is the i th variety mean over all environments, β i the regression coefficient that measures the response of the i th variety to varying environments, δ ij the deviation from regression of the i th variety at the j th environment and I j environmental index. The data from a set of quality protein maize hybrids were examined to see whether yield stability could be detected by the model. Yield stability among the hybrids was indicated by the regression coefficient of yield to the environmental index. The estimates of the squared deviation from regression for four hybrids were not significant statistically, whereas highly significant estimates were obtained from the other hybrids.
出处
《西南农业大学学报（自然科学版）》
CSCD
2000年第5期424-427,共4页
Journal of Southwest Agricultural University
基金
云南省"九五"重点攻关资助顶目
关键词
优质蛋白玉米
产量稳定性
环境指数
回归系数
杂交种
quality protein maize hybrid
stability analysis
environmental index
regression coefficient
deviation from regressi€
