Table 4.
Mean (highest posterior density interval at 95 %) of the marginal posterior distribution of genetic parameters estimated with the single-step model
| Trait | Parameter | |||||||
|---|---|---|---|---|---|---|---|---|
| h 2A | t 2AC | t 2BC | rg A, AC | p 2A | p 2C | σ 2A | σ 2C | |
| Growth rate | 0.22 [0.05, 0.37] |
0.25 [0.03, 0.45] |
0.28 [0.12, 0.44] |
0.84 [0.45, 1.00] |
0.14 [0.06, 0.23] |
0.09 [0.02, 0.16] |
9151 [7954, 10,418] |
8028 [6813, 9324] |
| Feed conversion ratio | 0.32 [0.20, 0.46] |
0.29 [0.13, 0.46] |
0.18 [0.05, 0.32] |
0.91 [0.72, 1.00] |
0.10 [0.03, 0.18] |
0.09 [0.03, 0.16] |
0.02 [0.02, 0.03] |
0.02 [0.02, 0.02] |
| Lean meat | 0.41 [0.25, 0.57] |
0.30 [0.14, 0.46] |
0.28 [0.12, 0.45] |
0.69 [0.30, 1.00] |
0.04 [0.0001, 0.08] |
0.06 [0.01, 0.12] |
2.50 [2.19, 2.82] |
3.15 [2.75, 3.59] |
| pH longissimus dorsi | 0.30 [0.17, 0.36] |
0.26 [0.16, 0.40] |
0.11 [0.02, 0.22] |
0.97 [0.83, 1.00] |
– | – | 0.02 [0.02, 0.02] |
0.02 [0.02, 0.03] |
| Drip loss | 0.57 [0.44, 0.69] |
0.21 [0.08, 0.35] |
0.15 [0.03, 0.30] |
0.89 [0.62, 1.00] |
– | – | 6.21 [5.41, 7.04] |
3.38 [2.96, 3.81] |
| Intramuscular fat | 0.31 [0.16, 0.48] |
0.34 [0.16, 0.54] |
0.25 [0.08, 0.43] |
0.82 [0.46, 1.00] |
– | – | 0.05 [0.05, 0.06] |
0.07 [0.06, 0.08] |
h 2A = purebred heritability
t 2iC = ratio of variance of the parental allelic contribution in the crossbreds (i = A, B for Piétrain and Large White line, respectively) computed as 2σ 2iC/σ 2C where σ 2iC is the additive genetic variance of the corresponding parental alleles in the crossbreds
rg A, AC = genetic correlation between purebred individual and sire line contribution in the crossbreds
p 2j = ratio of variance of common pen effect
σ 2j = phenotypic variances (j = A, C for purebred Piétrain and crossbred, respectively)