Table 3 **Pearson correlation of the estimates of the 1225 interaction effects when different marker codings are used and the number of genotypes used to estimate the effects is reduced from the 599 available lines to 300 or 200, respectively. Only the model with 50 markers and 1225 interactions is considered. The numbers represent the mean correlation of 50 repetitions with independently, uniformly drawn markers and lines. The standard error of the estimate was in all cases below 0.025. Colors indicate the underlying data: Environment 1, 2, 3 or 4.**