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Effect of Environmental Variates on Genotype x Environment Interaction of Winter Wheat

A Comparison of Biadditive Factorial Regression to AMMI

^a INRA, Unité de Génétique et d'Amélioration des Plantes, 80200 Estrées-Mons, France
^b INRA, Station de Génétique et d'Amélioration des Plantes, 17 rue Sully, BP 86510, 21065 Dijon Cedex, France

View larger version (15K): [in a new window]   Fig. 1. Ecovalences and main effects for the 13 genotypes.

View larger version (16K): [in a new window]   Fig. 2. Scores from BIAREG and AMMI for genotypes (a) and environments (b).

View larger version (21K): [in a new window]   Fig. 3. Contributions of each covariate to the synthetic environmental variates defined with BIAREG: 1st and 2nd synthetic variates (a) 1st and 3rd variates (b) Significant variates are given in bold. Codes of environment covariates are the same as in Table 3.

View larger version (39K): [in a new window]   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.