Additional file 1 of Maximizing efficiency in sunflower breeding through historical data optimization

Additional file 1. Predictive ability of the gradient boosting machine model across all scenarios and repetitions for the training set (TRS) optimization methods tested using fixed values of the TRS size. The following columns are included: Method: TRS optimization method used; TRS_size: size of the TRS expressed as percentage of the candidate set size; Trait: phenotypic trait; Method_iter: iteration number for the optimization method; Model_iter: iteration number for the genomic selection model; Predictive_ability: correlation of predictions in test set and the empirical genotypic values; TS: year of the field trials used as test set; CS: years of the field trials used as candidate set (1 = one year prior to test set year, 2 = two years prior to test set year, etc.).