Table 1.
Descriptive statistics and genetic correlations (rg) between two laying periods for feed intake and efficiency
| Traitsa | Mean | SD | CV (%) | Min | Max | bRg |
|---|---|---|---|---|---|---|
| FI1 (g/day) | 91.57 | 7.94 | 8.67 | 56.14 | 106.36 | 0.78 (0.09) |
| FI2 (g/day) | 105.12 | 7.99 | 7.60 | 53.86 | 125.11 | |
| RFI1 (g/day) | 0.03 | 6.58 | 21,933 | −24.44 | 23.73 | 0.76 (0.09) |
| RFI2 (g/day) | 0.27 | 7.11 | 2633 | −32.00 | 23.16 | |
| FCR1 (g:g) | 2.61 | 0.72 | 27.58 | 1.72 | 10.31 | 0.94 (0.07) |
| FCR2 (g:g) | 3.61 | 3.08 | 85.31 | 1.83 | 61.96 |
n = 1534
aFI1, RFI1 and FCR1, and FI2, RFI2 and FCR2 represent daily feed intake, residual feed intake and feed conversion ratio in laying period between 37 and 40 weeks and between 57 and 60 weeks, respectively
brg = genetic correlation; standard errors of estimates are in parentheses