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Singular-Value Partitioning in Biplot Analysis of Multienvironment Trial Data

Cereal Breeding and Biometrics, Univ. of Guelph, Guelph, ON, Canada N1G 2W1

View larger version (99K): [in a new window]   Fig. 1. Polygon view of the GGE biplot: (A) environment-focused scaling, (B) genotype-focused scaling, (C) symmetrical scaling, and (D) equal-space scaling. Genotypes are in title case, and environments are in upper case. PC, principal component.

View larger version (102K): [in a new window]   Fig. 2. Average environment coordination (AEC) view of the GGE biplot: (A) environment-focused scaling, (B) genotype-focused scaling, and (C) symmetrical scaling. Genotypes are in title case, and environments are represented by E. The concentric circles are used to compare all genotypes with the ideal cultivar, which is represented by the concentric center. The single isolated circle represents the mean environment. PC, principal component.

View larger version (47K): [in a new window]   Fig. 3. Vector view of the GGE biplot: (A) environment-focused scaling, (B) genotype-focused scaling, and (C) symmetrical scaling. Genotypes are represented by c, and environments are in upper case.