Table 2.
Estimates of variance components and ratios with standard errors for NBA using purebred data.
| Herd | Estimates of Variance Components for Purebred Data | ||||
|---|---|---|---|---|---|
| Var(a) | Var(p) | Var(l) | Var(e) | Var(ph) | |
| A | 0.508 + 0.455 | 0.951 + 0.543 | 0.000 + 0.000 | 9.053 + 0.415 | 10.513 |
| B | 0.602 + 0.191 | 0.428 + 0.195 | 0.332 + 0.124 | 10.318 + 0.211 | 11.681 |
| C | 1.615 + 0.590 | 1.248 + 0.752 | 0.000 + 0.000 | 14.058 + 0.648 | 16.922 |
| ABC | 0.825 + 0.196 | 1.171 + 0.214 | 0.189 + 0.117 | 10.324 + 0.174 | 12.511 |
| h2 | p2 | l2 | e2 | ||
| A | 0.048 + 0.042 | 0.090 + 0.051 | 0.000 + 0.000 | 0.861 + 0.033 | |
| B | 0.051 + 0.016 | 0.036 + 0.016 | 0.028 + 0.010 | 0.883 + 0.014 | |
| C | 0.095 + 0.034 | 0.073 + 0.044 | 0.000 + 0.000 | 0.830 + 0.035 | |
| ABC | 0.065 + 0.015 | 0.093 + 0.017 | 0.015 + 0.009 | 0.825 + 0.012 | |
Var(a)—direct additive genetic variance; Var(l)—variance of common litter environmental effect; Var(p)—permanent environmental variance; Var(e)—residual error variance; Var(ph)—phenotypic variance; h2—direct heritability; p2—proportion of permanent environmental effect; l2—proportion of common litter environmental effect; e2—proportion of residual error variance.