Table 4.

Accuracy {expressed as correlations between true breeding values (TBV) and genomic estimated breeding values [GEBV; r(TBV, GEBV)]}, and slopes [b(TBV, GEBV)] of regression of TBV on GEBV for genomic prediction with simulated QTL genotypes included for training and validation

		Ayrshire			Holstein
No. of QTL	ρ	Single-task	Pooling	Multi-task	Single-task	Pooling	Multi-task
r(TBV, GEBV)
20	0.2	0.76 ± 0.04	0.64 ± 0.04	0.92 ± 0.01	0.96 ± 0.01	0.93 ± 0.01	0.97 ± 0.01
20	0.8	0.71 ± 0.05	0.88 ± 0.02	0.93 ± 0.01	0.97 ± 0.01	0.97 ± 0.01	0.97 ± 0.01
200	0.2	0.57 ± 0.03	0.53 ± 0.03	0.60 ± 0.04	0.77 ± 0.01	0.76 ± 0.01	0.78 ± 0.01
200	0.8	0.54 ± 0.04	0.65 ± 0.02	0.61 ± 0.04	0.76 ± 0.02	0.78 ± 0.02	0.77 ± 0.01
b(TBV, GEBV)
20	0.2	1.01 ± 0.06	0.83 ± 0.08	0.99 ± 0.03	1.00 ± 0.01	1.00 ± 0.02	1.00 ± 0.01
20	0.8	1.04 ± 0.08	0.89 ± 0.06	0.97 ± 0.03	0.98 ± 0.01	1.01 ± 0.02	0.99 ± 0.01
200	0.2	1.23 ± 0.10	0.89 ± 0.06	1.16 ± 0.08	1.00 ± 0.03	1.03 ± 0.03	1.01 ± 0.03
200	0.8	1.10 ± 0.09	1.06 ± 0.06	1.12 ± 0.09	0.98 ± 0.03	0.97 ± 0.03	0.98 ± 0.02