Table 10.
Heritability of different traits related to feed efficiency in pigs, laying hens, broilers, and dairy cattle.
| Trait | Pigs | Laying Hens | Broilers | Dairy Cattle |
|---|---|---|---|---|
| RFI | 0.11–0.38 [73,74,75] | 0.21–0.47 [76,77] | 0.21–0.49 [78,79,80,81] | 0.22–0.40 [82,83] |
| DFI | 0.19–0.56 [73,74,75] | |||
| FI | 0.20–0.46 [76,77] | 0.35–0.48 [78,79,81] | ||
| ADG | 0.24–0.54 [73,74,75,84] | |||
| FE | 0.29 [78] | |||
| BF | 0.54–0.67 [74,75,84] | |||
| LGR | 0.39–0.46 [73,84] | |||
| GR | 0.26–0.32 [85] | |||
| FCR | 0.28–0.32 [73,74] | 0.13–0.19 [77] | 0.12–0.49 [78,79,80] | 0.17 [86] |
| BC | 0.13–0.19 [87] | |||
| AMEn | 0.37–0.38 [81] | |||
| DL | 0.47 [81] | |||
| DS | 0.37 [81] | |||
| DP | 0.33 [81] | |||
| MUN | 0.14 [88] | |||
| EB | 0.20 [88] | |||
| DMI | 0.29–0.32 [82] |
RFI: residual feed intake, DFI: daily feed intake, FI: feed intake, ADG: average daily gain, FE: feed efficiency, BF: back fat, LGR: lean growth rate, GR: growth rate, FCR: feed conversion ratio, BC: body confirmation; AMEn: apparent metabolized energy, DL: digestibility of lipids, DS: digestibility of starch, DP: digestibility of proteins measured in the manure, MUN: milk urea nitrogen, EB: energy balance, DMI: dry matter intake.