Table 2.

Graphical displays of VCU and of on-farm results

Description	Ordinate	Abscissa	Equations used	Figures
Visible genetic trend	Adj. genotype class means C p	Year of first testing r i	Equation (9) inserted in baseline model (1) keeping C p and Y k fixed	Figure 2: all quality groups; Figure 3: quality groups E, A, B
Visible agronomic trend	Adj. year means for Y k	Calendar (harvest) year t k	Model (1) keeping G i and Y k fixed	Figure 3: quality groups E, A, B
Visible overall trend	Adj. year means for Y k	Calendar (harvest) year t k	Model (4)	Figure 2: all quality groups; Figure 3: quality groups E, A, B
Genotype by year plots	Adj. genotype means G i	Year of first testing r i	Model (1) keeping effects for genotypes G i and years Y k fixed	Figure 4
Correlation plots	Adj. genotype means G i	Adj. genotype means G i	Model (1) keeping effects for genotypes G i and years Y k fixed	Figures 6, 7, 8, S2

On-farm data are based on variety by year means; equations are applied analogously (see Materials and methods)