title: Bias in the estimation of regression coefficients in the analysis of genotype-environmental interaction.
abstract: Potential bias in estimates of regression coefficients when the environmental index in joint regressional analysis is the mean of all genotypes is examined in relation to assumptions of random and fixed genotypic effects and the error structure of the experiment. A modification is suggested.
mesh_terms: D004777:Environment; D005838:Genotype; D008954:Models, Biological; D012044:Regression Analysis; D013223:Statistics as Topic