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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)

From: Single-step genomic evaluation with metafounders for feed conversion ratio and average daily gain in Danish Landrace and Yorkshire pigs

  \(\sigma_{a\_ADG}^{2}\) \(\sigma_{a\_ADG, a\_FCR}\) \(\sigma_{a\_FCR}^{2}\) \(\sigma_{pen}^{2}\) \(\sigma_{litter}^{2}\) \(\sigma_{e\_ADG}^{2}\) \(\sigma_{e\_FCR}^{2}\) \(h_{a\_ADG}^{2}\) \(h_{a\_FCR}^{2}\) \(r_{g}\)
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)
  1. Variance components for genetic parameters correspond to the usual genetic variance (in MF-SSGBLUP, all the variance components are multiplied by (\(1 - \gamma_{L} )/2\)), which is the variance among unrelated individuals in the base population
  2. \(\sigma_{a\_ADG}^{2}\) is the additive genetic variance for ADG, \(\sigma_{a\_FCR}^{2}\) is the additive genetic variance for FCR; \(\sigma_{{a\_ADG,{ }a\_FCR}}\) is genetic covariance between ADG and FCR; \(\sigma_{litter}^{2}\) is the variance of litter effect for ADG; \(\sigma_{e\_ADG}^{2}\) is the residual variance for ADG; \(\sigma_{e\_FCR}^{2}\) is the residual variance for FCR
  3. Numbers between brackets are the standard errors of the corresponding parameters