Table 4 Bias in estimation of σ² Av ,exp and correlation between mean and residual variance for a simulated trait *
From: Genetic and environmental heterogeneity of residual variance of weight traits in Nellore beef cattle
Observed pedigree | |||||||
|---|---|---|---|---|---|---|---|
Model | rmv | σ²Av,exp = 0.01 | σ²Av,exp = 0.09 | σ²Av,exp = 0.25 | |||
Bias (%) | rˆmv | Bias (%) | rˆmv | Bias (%) | rˆmv | ||
HOM | −0.5 | −37.2 | −0.13 | −55.4 | −0.26 | −58.5 | −0.32 |
(16.2) | (0.03) | (5.2) | (0.02) | (2.7) | (0.02) | ||
HET | −0.5 | 1842.4 | −0.15 | 302.8 | −0.29 | 169.9 | −0.35 |
(101.5) | (0.02) | (20.2) | (0.02) | (51.8) | (0.02) | ||
HOM | 0 | −35.4 | 0.02 | −53.7 | 0.01 | −55.1 | 0.02 |
(12.9) | (0.02) | (5.2) | (0.02) | (3.3) | (0.02) | ||
HET | 0 | 1957.8 | 0.00 | 291.2 | 0.01 | 142.4 | 0.02 |
(160.3) | (0.02) | (17.3) | (0.02) | (10.1) | (0.02) | ||
HOM | 0.5 | −44.5 | 0.11 | −61.9 | 0.21 | −56.4 | 0.30 |
(18.1) | (0.02) | (4.8) | (0.02) | (2.7) | (0.02) | ||
HET | 0.5 | 1820.0 | 0.13 | 311.4 | 0.26 | 131.5 | 0.34 |
(184.4) | (0.02) | (24.8) | (0.02) | (8.9) | (0.02) | ||
Simulated pedigree | |||||||
Model | r mv | σ² Av ,exp  = 0.01 | σ² Av ,exp  = 0.09 | σ² Av ,exp  = 0.25 | |||
Bias (%) | rˆ mv | Bias (%) | rˆ mv | Bias (%) | rˆ mv | ||
HOM | −0.5 | 68.30 | −0.05 | −45.74 | −0.20 | −53.37 | −0.26 |
(40.80) | (0.02) | (5.62) | (0.01) | (3.35) | (0.02) | ||
HET | −0.5 | 2993.04 | −0.08 | 389.63 | −0.23 | 133.73 | −0.30 |
(156.76) | (0.02) | (18.90) | (0.01) | (13.85) | (0.02) | ||
HOM | 0 | 56.29 | −0.03 | −51.58 | −0.02 | −50.35 | 0.01 |
(42.09) | (0.02) | (5.07) | (0.02) | (3.46) | (0.02) | ||
HET | 0 | 3062.76 | 0.02 | 361.38 | 0.01 | 136.38 | −0.02 |
(131.99) | (0.02) | (18.28) | (0.01) | (7.71) | (0.02) | ||
HOM | 0.5 | 11.47 | 0.05 | −47.80 | 0.21 | −52.36 | 0.27 |
(34.49) | (0.02) | (5.99) | (0.01) | (3.90) | (0.01) | ||
HET | 0.5 | 2684.63 | 0.08 | 363.39 | 0.23 | 108.27 | 0.31 |
(184.43) | (0.01) | (19.62) | (0.01) | (16.81) | (0.01) | ||