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.
| Model | DMC | DMY | DtSILK | PH |
|---|---|---|---|---|
| Population effects | 28.4 ± 4.18 (SD) | 17.1 ± 4.16 (SD) | 10.4 ± 2.97 (SD) | 29.2 ± 4.35 (SD) |
| Pop+QTL GCA | 48.2 ± 4.48 (SD) | 29.0 ± 5.32 (SD) | 32.9 ± 4.60 (SD) | 49.8 ± 4.82 (SD) |
| Pop+QTL GCA and SCA | 47.4 ± 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.