Table 3.
Heritability estimates (h2; diagonal) and genetic correlations (rg; above diagonal) with SE for bovine respiratory disease (BRD), cortisol, immunoglobulins (IgG, IgG2, IgG1, and IgG2), and IL-8 measured at receiving in Bos taurus cattle weaned in central Nebraska and received at the South Eastern Colorado Research Center (Fort Collins, CO)1,2,3,4
| Item | BRD | Cortisol | Total IgG | IgG1 | IgG2 | IL-8 |
|---|---|---|---|---|---|---|
| BRD | 0.17 (0.08) | −0.19 (0.32) | 0.42 (0.28) | 0.36 (0.32) | 0.07 (0.25) | 0.26 (0.26) |
| Cortisol | 0.13 (0.05) | −0.19 (0.26) | −0.12 (0.29) | 0.06 (0.22) | −0.08 (0.29) | |
| Total immunoglobulin | 0.15 (0.05) | 0.85 (0.12) | 0.83 (0.09) | 0.05 (0.20) | ||
| IgG1 | 0.11 (0.05) | 0.55 (0.16) | 0.01 (0.22) | |||
| IgG2 | 0.24 (0.06) | −0.11 (0.17) | ||||
| IL-8 | 0.30 (0.06) |
1Contemporary group for cortisol, IgG, IgG1, IgG2, and IL8 defined as ranch and entry process date, and contemporary group for BRD defined as ranch, lot, and process date. All analyses were fit with covariate process order within day.
2Genetic correlations estimated in ASREML (VSN International, Ltd., Hemel Hempstead, UK) using the sire model.
3Beef cattle (n = 2,869) measured over 2 yr.
4IgG = Total Immunoglobulin, IgG1 = Immunoglobulin 1, IgG2 = Immunoglobulin 2, IL-8 = Interleukin 8.