Table 1 Descriptive statistics, additive genetic variance (\({\sigma }_{a}^{2}\)) and heritability (\({h}^{2}\)) estimates for Nellore feed efficiency-related traits in IZ and Qualitas populations
IZ population (N = 1,024) | ||||||
|---|---|---|---|---|---|---|
Trait | Mean | SD | Min | Max | \({\sigma }_{a}^{2}\) | \({h}^{2}\) |
  ADG (kg/day) | 1.04 | 0.25 | 0.17 | 1.72 | 0.010 (0.002) | 0.33 (0.042) |
  FCR | 7.24 | 1.66 | 3.65 | 15.23 | 0.19 (0.072) | 0.19 (0.034) |
  RFI (kg/day) | -0.01 | 0.61 | -2.36 | 4.13 | 0.27 (0.052) | 0.28 (0.022) |
  DMI (kg/day) | 7.29 | 1.54 | 2.15 | 12.64 | 0.32 (0.033) | 0.40 (0.039) |
  FE | 0.15 | 0.03 | 0.07 | 0.27 | 0.001 (0.0004) | 0.21 (0.029) |
Qualitas population (N = 918) | ||||||
  ADG (kg/day) | 1.53 | 0.43 | 0.28 | 2.48 | 0.028 (0.007) | 0.34 (0.018) |
  FCR | 7.88 | 3.05 | 4.32 | 21.79 | 1.13 (0.302) | 0.23 (0.017) |
  RFI (kg/day) | -0.006 | 0.76 | -2.78 | 3.34 | 0.35 (0.035) | 0.35 (0.025) |
  DMI (kg/day) | 11.05 | 1.44 | 7.18 | 15.84 | 0.47 (0.092) | 0.45 (0.019) |
  FE | 0.13 | 0.03 | 0.05 | 0.23 | 0.008 (0.0005) | 0.30 (0.022) |