Table 2.
Variance components and heritability estimates from four multi-breed models for tropically-adapted beef heifer traits at approximately 600 days of age
| Number of records | BREEDFIXED | BREEDRANDOM | NOBREED | BAYESR | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vg | Ve | Vg_w | Vg_b | Ve | Vg | Ve | Vg | Ve | ||
| Variance components* | ||||||||||
| Live weight (kg) | 26,721 | 455.7 ± 19.0 | 1006.9 ± 14.7 | 444.5 ± 19.0 | 367.8 ± 190.4 | 1027.7 ± 14.7 | 455.5 ± 19.0 | 1022.8 ± 14.7 | 461.1 ± 19.0 | 1006.1 ± 16.6 |
| Hip height (mm) | 25,567 | 923.5 ± 33.7 | 1393.9 ± 23.0 | 960.5 ± 22.2 | 668.7 ± 339.8 | 1341.8 ± 33.2 | 969.4 ± 33.9 | 1407.2 ± 22.9 | 920.2 ± 30.0 | 1447.8 ± 26.6 |
| Body condition score | 26,794 | 0.03 ± 0.001 | 0.10 ± 0.001 | 0.03 ± 0.001 | 0.003 ± 0.003 | 0.10 ± 0.001 | 0.03 ± 0.001 | 0.10 ± 0.001 | 0.03 ± 0.001 | 0.10 ± 0.001 |
| Heifer puberty | 29,367 | 0.05 ± 0.002 | 0.16 ± 0.002 | 0.05 ± 0.002 | 0.02 ± 0.014 | 0.10 ± 0.014 | 0.05 ± 0.002 | 0.16 ± 0.002 | 0.05 ± 0.002 | 0.15 ± 0.002 |
| Heritabilities | ||||||||||
| Live weight (kg) | 26,721 | 0.30 ± 0.01 | 0.24 ± 0.03 | 0.20 ± 0.08 | 0.31 ± 0.01 | 0.31 ± 0.01 | ||||
| Hip height (mm) | 25,567 | 0.40 ± 0.01 | 0.32 ± 0.04 | 0.23 ± 0.09 | 0.41 ± 0.01 | 0.39 ± 0.01 | ||||
| Body condition score | 26,794 | 0.22 ± 0.01 | 0.22 ± 0.01 | 0.02 ± 0.02 | 0.22 ± 0.01 | 0.24 ± 0.01 | ||||
| Heifer puberty | 29,367 | 0.22 ± 0.01 | 0.20 ± 0.02 | 0.10 ± 0.05 | 0.23 ± 0.01 | 0.25 ± 0.01 | ||||
Variance components are the genetic vairance, Vg and Ve the error variance. In addition, the BREEDRANDOM model estimates within-breed (Vg_w) and across-breed genetic variance components (Vg_b)