Table 3.
Estimates of variance components and ratios with standard errors for NBA using purebred and crossbreed data.
| Herd. | Estimates of Variance Components for Purebred and Crossbreed Data | ||||
|---|---|---|---|---|---|
| Var(a) | Var(p) | Var(l) | Var(e) | Var(ph) | |
| A | 0.912 + 0.123 | 0.601 + 0.090 | 0.090 + 0.050 | 7.787 + 0.070 | 9.393 |
| B | / | / | / | / | / |
| C | 0.955 + 0.198 | 1.107 + 0.199 | 0.120 + 0.126 | 10.219 + 0.160 | 12.403 |
| ABC | 0.970 + 0.089 | 0.727 + 0.075 | 0.181 + 0.039 | 8.754 + 0.058 | 10.634 |
| h2 | p2 | l2 | e2 | ||
| A | 0.097 + 0.012 | 0.064 + 0.009 | 0.009 + 0.005 | 0.829 + 0.007 | |
| B | / | / | / | / | |
| C | 0.077 + 0.015 | 0.089 + 0.016 | 0.009 + 0.010 | 0.823 + 0.011 | |
| ABC | 0.091 + 0.008 | 0.068 + 0.007 | 0.017 + 0.003 | 0.823 + 0.005 | |
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.