Table 2 Estimates of variance components, heritabilities, and genetic correlations for average daily gain (ADG) and feed conversion ratio (FCR) in Landrace pigs using pedigree-based univariate BLUP and univariate (UNI) or bivariate (BI) single-step genomic prediction models with or without metafounders (MF)
\(\sigma_{a\_ADG}^{2}\) | \(\sigma_{a\_ADG, a\_FCR}\) | \(\sigma_{a\_FCR}^{2}\) | \(\sigma_{pen}^{2}\) | \(\sigma_{litter}^{2}\) | \(\sigma_{e\_ADG}^{2}\) | \(\sigma_{e\_FCR}^{2}\) | \(h_{a\_ADG}^{2}\) | \(h_{a\_FCR}^{2}\) | \(r_{g}\) | |
|---|---|---|---|---|---|---|---|---|---|---|
Pedigree-based univariate BLUP | 1916.33 (98.71) | − 0.56 (0.44) | 4.12 × 10–3 (2.55 × 10–3) | 633.35 (69.57) | 455.57 (77.25) | 4544.12 (96.21) | 2.82 × 10–2 (2.49 × 10–3) | 0.25 (0.05) | 0.13 (0.06) | − 0.20 (0.11) |
UNI_SSGBLUP | 1899.91 (99.30) | – | 3.44 × 10–3 (2.61 × 10–3) | 669.29 (64.02) | 510.24 (81.99) | 4787.67 (95.34) | 2.87 × 10–2 (2.53 × 10–3) | 0.24 (0.04) | 0.11 (0.06) | – |
BI_SSGBLUP | 1882.02 (96.75) | − 0.48 (0.42) | 3.35 × 10–3 (2.42 × 10–3) | 691.50 (50.15) | 527.58 (63.81) | 4885.49 (90.25) | 2.88 × 10–2 (2.47 × 10–3) | 0.24 (0.04) | 0.10 (0.06) | − 0.19 (0.09) |
UNI_MF-SSGBLUP | 1885.58 (102.48) | – | 3.46 × 10–3 (2.59 × 10–3) | 721.22 (59.25) | 529.21 (65.23) | 4894.98 (95.54) | 2.88 × 10–2 (2.61 × 10–4) | 0.23 (0.04) | 0.11 (0.07) | – |
BI_MF-SSGBLUP | 1887.71 (97.14) | − 0.68 (0.43) | 3.48 × 10–3 (2.41 × 10–3) | 727.64 (53.62) | 532.84 (63.94) | 4916.36 (91.40) | 2.87 × 10–2 (2.50 × 10–3) | 0.23 (0.05) | 0.11 (0.05) | − 0.27 (0.10) |