Table 4.
LSmeans of the line effect for carcass and quality traits.
| P | High-RFI | Low-RFI | |||
|---|---|---|---|---|---|
| Line | LSmeans | SE | LSmeans | SE | |
| Carcass traits1 | |||||
| Carcass weight (g) | ** | 4965a | 48 | 5185b | 50 |
| Liver weight (g) | ns | 514 | 17 | 538 | 18 |
| Leg weight (g) | ** | 462a | 7 | 496b | 7 |
| abdominal fat (g) | *** | 153a | 3 | 170b | 4 |
| Muscle magret weight (g) | *** | 288a | 7 | 306b | 7 |
| Skin magret weight (g) | ns | 168 | 4 | 166 | 4 |
| Quality trait | |||||
| fatty liver | |||||
| Lipid content (% FM1) | ns | 57.3 | 0.6 | 56.6 | 0.7 |
| Dry matter (% FM) | ns | 67.9 | 0.5 | 66.9 | 0.5 |
| Melting rate (%) | ns | 35 | 2 | 29 | 2 |
| magret | |||||
| Lipid content (% FM) | ns | 6.28 | 0.13 | 6.02 | 0.13 |
| Dry matter (% FM) | ns | 27.9 | 0.11 | 27.7 | 0.12 |
| Drip loss D1-D3 (%) | * | 0.69a | 0.05 | 0.88b | 0.05 |
| Drip loss D3-D6 (%) | ns | 0.46 | 0.03 | 0.46 | 0.03 |
| Drip loss D1-D6 (%) | * | 1.15a | 0.06 | 1.35b | 0.06 |
| Magret color/cut2 | |||||
| L* | ** | 41.93a | 0.19 | 42.72b | 0.20 |
| a* | ** | 23.37a | 0.07 | 23.05b | 0.07 |
| b* | ns | 8.70 | 0.08 | 8.70 | 0.08 |
| Magret color/surface2 | |||||
| L* | ns | 46.30 | 0.19 | 46.76 | 0.19 |
| a* | ns | 19.28 | 0.11 | 19.06 | 0.11 |
| b* | ns | 10.01 | 0.12 | 10.08 | 0.13 |
Concerning carcass traits, least square means (LSmeans) and SE of the line effect were estimated from linear models accounting for the following fixed effects: operator and line. Concerning the color parameters, LSmeans and SE of the line effect were estimated from linear models accounting for the following fixed effects: line and day. The d effect was significant for all color parameters (P ≤ 0.0008). The interaction between line and day was tested but was never significant.
In a row, values with different superscripts (a, b) were found to be significantly different (P < 0.05) for the line effect.
1FM: fresh matter.
2L* = lightness; a* = redness; b* = yellowness. *: P < 0.05; **: P < 0.01; ***: P < 0.001.