Table 8.

Accuracies* of BOA^a, G^b_A, and G^c_B models calculated for each of the four folds of cross-validation for estimating breeding values of the paternal breed Synthetic boar pigs for crossbred performance for each trait, and average weighting factor (w) of the calculated DRP per validation fold

Folds	$\mathit{w}$	BOA	${\mathbf{G}}_{\mathbf{A}}$	${\mathbf{G}}_{\mathbf{B}}$
ADG
1	0.49	0.055	0.055	0.057
2	0.12	0.128	0.111	0.094
3	0.21	0.170	0.156	0.152
4	0.07	0.063	0.084	0.082
Mean		0.104	0.102	0.096
BF
1	0.31	0.168	0.168	0.162
2	0.39	0.201	0.157	0.159
3	0.52	0.191	0.294	0.280
4	0.25	0.150	0.179	0.177
Mean		0.178	0.199	0.195
LD
1	0.55	0.204	0.234	0.236
2	0.67	0.212	0.209	0.207
3	0.88	0.127	0.140	0.134
4	0.45	0.088	0.135	0.142
Mean		0.158	0.179	0.180

ADG average daily gain, BF back fat thickness, LD loin depth

* Accuracies measured as weighted correlation between DRP and EBV of S pigs for crossbred performance. Approximate standard errors SE, computed as (1−r²)/N √ (1−r²)/N, were equal to 0.023 to 0.024 for the mean accuracies across the folds, for all combinations of traits and methods.

^aBOA model, model with breed-specific relationship matrices

^b ${\text{G}}_{\text{A}}$ model, model with genomic relationship matrix by allele frequencies obtained across the genotyped population

^c ${\mathbf{G}}_{\mathbf{B}}$ model, model with genomic relationship matrix by breed-specific allele frequencies