Table 1 Estimates of variance components [mean (SD) over 100 replicates] from group or individual records when using different models for the base scenario (L2×3)
Litter and pen effect | Record | Model | Additive genetic variance \(\left( {\sigma_{\text{a}}^{2} } \right)\) | Litter variance \((\sigma_{\text{l}}^{2} )\) | Pen variance \((\sigma_{\text{c}}^{2} )\) | Residual variance \((\sigma_{\text{e}}^{2} )\) |
|---|---|---|---|---|---|---|
Yes | Â | Simulated | 120 | 40 | 40 | 200 |
| Â | Group | MA | 133.1 (28.8) | Â | Â | 661.9 (35.7) |
| Â | Â | MAL | 118.8 (26.5) | 48.7 (22.6) | Â | 558.0 (58.1) |
| Â | Â | MAP | 129.7 (27.5) | Â | 46.2 (16.9) | 226.1 (155.6) |
| Â | Â | MALP | 118.5 (25.7) | 38.8 (22.4) | 40.4 (17.0) | 209.3 (150.5) |
| Â | Individual | MA | 175.3 (10.1) | Â | Â | 236.9 (6.2) |
| Â | Â | MAL | 119.5 (11.1) | 55.9 (3.9) | Â | 223.5 (6.8) |
| Â | Â | MAP | 158.1 (9.3) | Â | 46.1 (2.6) | 204.1 (5.8) |
| Â | Â | MALP | 119.4 (10.1) | 39.9 (3.3) | 40.0 (2.4) | 199.6 (6.3) |
No | Â | Simulated | 120 | 0 | 0 | 280 |
| Â | Group | MA | 118.0 (17.6) | Â | Â | 281.9 (20.3) |
| Â | Â | MAL | 114.6 (18.0) | 5.4 (7.2) | Â | 271.2 (23.2) |
| Â | Â | MAP | 116.5 (17.7) | Â | 4.0 (6.5) | 244.7 (59.7) |
| Â | Â | MALP | 114.5 (18.9) | 4.9 (7.0) | 3.6 (6.1) | 238.2 (57.8) |
| Â | Individual | MA | 119.2 (9.1) | Â | Â | 279.4 (6.5) |
| Â | Â | MAL | 118.0 (9.0) | 1.0 (1.5) | Â | 279.2 (6.5) |
| Â | Â | MAP | 119.0 (9.0) | Â | 0.5 (0.7) | 279.0 (6.5) |
| Â | Â | MALP | 118.0 (8.9) | 0.9 (1.4) | 0.5 (0.7) | 278.8 (6.6) |