Fig. 6

Effect of TS composition on family variance prediction accuracy (\( cor\left(\sigma, \hat{\sigma}\right) \)) considering genotypes simulated at generations 18, 19, 20 in the scenario Bridging_20y. a Mean prediction accuracy in 50 elite (ExE) families and b mean prediction accuracy in 50 introduction after bridging (DExE) families. Boxplots represent the results for 20 independent replicates. One can distinguish three training set types (left to right): Full training set considering all 3600 E progeny (Pure E), all 1200 DE progeny (Pure DE) and all 3600 E + 1200 DE progeny; Training sets at constant size of 1200 DH for comparison with Pure DE; Training sets at constant size of 3600 DH and variable proportion of DE progeny for comparison with Pure E. The red dotted line represents the median value for Pure E TS