Click on image to view larger version.
Fig. 1. Genotype x environment biplots from principal component analysis for protein and oil. Numerals refer to genotypes as listed in Table 1. Environments are represented by symbols. Trials are shown by different shapes (Aberdeen, circle; Tetonia irrigated, square; Tetonia dryland, triangle) and years by different shades (1999, black; 2000, white; 2001, gray). The percentages indicate the amount of explained variance accounted for by PC1 and PC2. Note: the 1999 environments (black symbols) are obscured by the 2001 ones (gray symbols) in the oil plot.
