Fig. 4. Biadditive factorial regression biplots with 1st and 2nd synthetic variates (a and c) and 1st and 3rd synthetic variates (b and d). Parameters of genotypes (dashed lines) are depicted in all the plots while environmental characterizations are displayed on a and b and environmental covariates (arrows) on c and d. Genotypes names are given in italic. The genotype "VM003" was hidden by the genotype "VM002" in all plots. Environment codes are the same as in Table 2. Codes of environment covariates are the same as in Table 3. Plots c and d are on the following page.