TABLE 5.
Estimates of genetic a (lower diagonal) and phenotypic a (upper diagonal) correlations among production, efficiency and immunity traits during the laying period (12 weeks from on-set of lay).
| Traits b | RFI | FCR | KLH-IgM | NDV-IgG |
|---|---|---|---|---|
| AFE | -0.06 ± 0.04 | -0.08 ± 0.04 | -0.01 ± 0.05 | -0.02 ± 0.06 |
| BWAFE | -0.05 ± 0.04 | -0.01 ± 0.04 | -0.08 ± 0.05 | 0.10 ± 0.06 |
| EWAFE | 0.08 ± 0.05 | -0.09 ± 0.05 | 0.12 ± 0.06 | -0.13 ± 0.05 |
| ADG | -0.11 ± 0.05 | -0.05 ± 0.04 | 0.10 ± 0.05 | -0.06 ± 0.06 |
| MBW | -0.04 ± 0.04 | 0.06 ± 0.04 | 0.09 ± 0.05 | 0.08 ± 0.06 |
| EN12 | -0.12 ± 0.09 | -0.39 ± 0.02** | -0.07 ± 0.06 | -0.02 ± 0.06 |
| EW12 | 0.10 ± 0.05 | 0.41 ± 0.04** | -0.10 ± 0.05 | -0.10 ± 0.05 |
| EM12 | -0.17 ± 0.05 | -0.49 ± 0.02** c | -0.02 ± 0.05 | -0.01 ± 0.06 |
| ADFI | 0.89 ± 0.01*** | 0.30 ± 0.05** | 0.04 ± 0.05 | 0.03 ± 0.05 |
| RFI | 0.25 ± 0.07** | 0.01 ± 0.05 | 0.15 ± 0.09 | |
| FCR | 0.41 ± 0.10** | 0.01 ± 0.06 | 0.07 ± 0.06 | |
| KLH-IgM | 0.33 ± 0.15* | 0.29 ± 0.24 | -0.16 ± 0.13 | |
| NDV-IgG | 0.50 ± 0.18* | 0.34 ± 0.21 | -0.49 ± 0.35 |
± SE, standard errors.
AFE, is age at first egg; BWAFE, is body weight at age at first egg; EWAFE, is egg weight at age at first egg; ADG, is average daily gain; MBW, is metabolic weight; EN12 is cumulative number of eggs 12 weeks from onset of lay; EW12 is average egg weight 12 weeks from onset of lay; EM12 is average daily egg mass 12 weeks from onset of lay; ADFI, is average daily feed intake; RFI, is residual feed intake; FCR, is feed conversion ratio; KLH-IgM, is natural antibody of IgM isotype binding to KLH, antigen measured at 16 weeks; NDV-IgG, is specific antibody IgG isotype binding to NDV, antigen measured at 16 weeks of age.
*** p < 0.001, ** p < 0.01, * p < 0.05.