Table 4 Cross-validation estimates of the quality of prediction of different models (average R2 and its SD) including population effects or population effects and QTL effects
ModelDMCDMYDtSILKPH
Population effects28.4 ± 4.18 (SD)17.1 ± 4.16 (SD)10.4 ± 2.97 (SD)29.2 ± 4.35 (SD)
Pop+QTL GCA48.2 ± 4.48 (SD)29.0 ± 5.32 (SD)32.9 ± 4.60 (SD)49.8 ± 4.82 (SD)
Pop+QTL GCA and SCA47.4 ± 4.58 (SD)27.3 ± 5.13 (SD)32.1 ± 4.81 (SD)48.3 ± 4.78 (SD)
  • For the models including QTL, for each sampling, QTL detected in the whole data set had their effects in the training set tested following a backward procedure and only the significant QTL were considered in the prediction model. Predictions were based on GCA effects only or on models considering also SCA effects significant at a 5% individual risk level. Pop, population.