Table 2 Estimated heritability (h2) in Dutch Holstein (DH) and New Zealand Jersey (NZJ), and the estimated genetic correlation between breeds (rg) estimated using the different genomic relationship matrices (GRM) and simulated phenotypes (100 replicates)
GRM fitted | h2 DH | h2 NZJ | r g |
|---|---|---|---|
Simulated rg = 1 | |||
MBSG (1 GRM fitted in a bivariate model) | |||
 ALL | 0.80 (0.01) | 0.76 (0.06) | 0.98 (0.19) |
 50k | 0.79 (0.01) | 0.76 (0.07) | 0.67 (0.18) |
 TOP | 0.44 (0.03) | 0.38 (0.06) | 0.85 (0.05) |
 TOP + RN | 0.48 (0.03) | 0.44 (0.05) | 0.77 (0.07) |
 CAUSAL | 0.80 (0.02) | 0.76 (0.02) | 1.00 (0.00) |
 NON CAUSAL | 0.77 (0.01) | 0.71 (0.20) | 0.20 (0.20) |
MBMG (2 separate GRM fitted simultaneously in a bivariate model) | |||
 TOP and 50k | 0.37 (0.04) and 0.41 (0.04) | 0.29 (0.05) and 0.48 (0.07) | 1.01 (0.03) and 0.98 (0.21) |
 TOP and NON CAUSAL | 0.37 (0.04) and 0.41 (0.03) | 0.31 (0.05) and 0.47 (0.07) | 1.02 (0.03) and 0.19 (0.22) |
 CAUSAL and NON CAUSAL | 0.80 (0.02) and 0.00 (0.00) | 0.76 (0.04) and 0.00 (0.02) | 1.01 (0.01) and NA |
Simulated rg = 0.5 | |||
MBSG (1 GRM fitted in a bivariate model) | |||
 ALL | 0.80 (0.01) | 0.80 (0.06) | 0.50 (0.18) |
 50k | 0.79 (0.01) | 0.79 (0.06) | 0.34 (0.18) |
 TOP | 0.44 (0.03) | 0.39 (0.05) | 0.43 (0.12) |
 TOP + RN | 0.48 (0.03) | 0.44 (0.05) | 0.41 (0.11) |
 CAUSAL | 0.80 (0.01) | 0.80 (0.02) | 0.51 (0.05) |
 NON CAUSAL | 0.78 (0.01) | 0.79 (0.06) | 0.11 (0.18) |
MBMG (2 separate GRM fitted simultaneously in a bivariate model) | |||
 TOP and 50k | 0.37 (0.03) and 0.43 (0.04) | 0.31 (0.05) and 0.49 (0.07) | 0.52 (0.11) and 0.53 (0.21) |
 TOP and NON CAUSAL | 0.38 (0.03) and 0.41 (0.03) | 0.31 (0.05) and 0.48 (0.07) | 0.52 (0.12) and 0.12 (0.21) |
 CAUSAL and NON CAUSAL | 0.80 (0.01) and 0.00 (0.00) | 0.80 (0.02) and 0.00 (0.02) | 0.51 (0.05) and NA |
Simulated rg = 0.25 | |||
MBSG (1 GRM fitted in a bivariate model) | |||
ALL | 0.80 (0.01) | 0.80 (0.06) | 0.27 (0.19) |
 50k | 0.79 (0.01) | 0.79 (0.06) | 0.18 (0.18) |
 TOP | 0.44 (0.03) | 0.39 (0.05) | 0.22 (0.13) |
 TOP + RN | 0.48 (0.03) | 0.44 (0.05) | 0.22 (0.12) |
 CAUSAL | 0.80 (0.01) | 0.80 (0.02) | 0.26 (0.06) |
 NON CAUSAL | 0.78 (0.01) | 0.76 (0.06) | 0.06 (0.18) |
MBMG (2 separate GRM fitted simultaneously in a bivariate model) | |||
 TOP and 50k | 0.37 (0.03) and 0.43 (0.04) | 0.31 (0.05) and 0.49 (0.07) | 0.27 (0.14) and 0.29 (0.21) |
 TOP and NON CAUSAL | 0.38 (0.03) and 0.41 (0.03) | 0.31 (0.05) and 0.48 (0.07) | 0.27 (0.13) and 0.08 (0.21) |
 CAUSAL and NON CAUSAL | 0.80 (0.01) and 0.00 (0.00) | 0.80 (0.02) and 0.00 (0.03) | 0.26 (0.06) and NA |