Table 1.
Number of QTL identified for each trait with the three groups of association studies
| Trait | h2 | Genetic differences in G9 (σg) | Global | HRFI | LRFI | Total |
|---|---|---|---|---|---|---|
| DFI | 0.41 | 2.11 | 2 | 1 | 3 | 6 |
| ADG | 0.5 | 0.15 | 1 | 3 | 4 | |
| FCR | 0.42 | 2.46 | 2 | 2 | 4 | |
| RFI | 0.13 | 3.84 | 3 | 2 | 5 | |
| carcBFT | 0.4 | 0.037 | 4 | 1 | 4 | 9 |
| a*_GM | 0.29 | 0.38 | 2 | 1 | 3 | |
| a*_GS | 0.26 | 0.12 | 4 | 4 | 8 | |
| b*_GM | 0.24 | 0.09 | 1 | 1 | 2 | |
| b*_GS | 0.32 | 1.14 | 6 | 4 | 1 | 11 |
| L*_GM | 0.2 | 0.38 | 1 | 5 | 6 | |
| L*_GS | 0.33 | 2.12 | 2 | 3 | 4 | 9 |
| pH24h_AD | 0.41 | 1.39 | 2 | 3 | 5 | |
| pH24h_GS | 0.39 | 1.98 | 4 | 1 | 1 | 6 |
| pH24h_LM | 0.32 | 1.45 | 4 | 3 | 4 | 11 |
| pH24h_SM | 0.38 | 1.74 | 3 | 1 | 1 | 5 |
| WHC | 0.04 | 0.68 | 3 | 5 | 8 | |
| MQI | 0.33 | 1.92 | 4 | 1 | 1 | 6 |
| LMCcalc | 0.59 | 1.31 | 3 | 1 | 4 | |
| DP | 0.36 | 0.93 | 3 | 1 | 6 | 10 |
| Belly_W | 0.28 | 1.90 | 2 | 2 | ||
| BF_W | 0.43 | 0.9 | 2 | 1 | 3 | 6 |
| Ham_W | 0.51 | 0.97 | 2 | 1 | 1 | 4 |
| Loin_W | 0.54 | 1.69 | 2 | 1 | 3 | |
| Shoulder_W | 0.38 | 1.11 | 1 | 1 | 2 | |
| Total | 56 | 36 | 47 | 139 |
Association studies on the full population (global-GWAS, Global) and for each line separately (HRFI-GWAS, HRFI and LRFI-GWAS, LRFI) were performed. Traits with more than three different QTL between the HRFI-GWAS and LRFI-GWAS analyses are indicated in italic characters. For each trait h2 = heritability, and responses to selection expressed in genetic standard deviations of the trait are reported as computed by Gilbert et al. [27]
DFI: daily feed intake; ADG: average daily gain; FCR: feed conversion ratio; RFI: residual feed intake; carcBFT: backfat thickness measured on carcass; a*_GM: a* measured on the gluteus medius muscle; a*_GS: a* measured on the gluteus superficialis muscle; b*_GM: b* measured on the gluteus medius muscle; b*_GS: b* measured on the gluteus superficialis muscle; L*_GM: L* measured on the gluteus medius muscle; L*_GS: L* measured on the gluteus superficialis muscle; pH24h_AD: pH 24 h after slaughter measured on the adductor femoris muscle; pH24h_GS: pH 24 h after slaughter measured on the gluteus superficialis muscle; pH24h_LM: pH 24 h after slaughter measured on the longissimus dorsi muscle; pH24h_SM: pH 24 h after slaughter measured on the semimembranosus muscle; WHC: water holding capacity of the gluteus superficialis muscle; MQI: meat quality index; LMCcalc: lean meat content of the carcass; DP: carcass dressing percentage; Belly_W: belly weight; BF_W: backfat weight; Ham_W: ham weight; Loin_W: loin weight; Shoulder_W: shoulder weight