Table 1.
Animal composition of the PHGC trials
| PRRS virus isolate | Trial # | Number of animals | Number of sires | Number of dams | Breed cross | Genetic backgrounda |
|---|---|---|---|---|---|---|
| NVSL-97-7895 | 1–3 | 507 | 32 | 203 | LW × LR | A |
| 4 | 191 | 6 | 33 | Duroc × LW/LR | B | |
| 5 | 182 | 10 | 38 | Duroc × LR/LW | C | |
| 6 | 109 | 26 | 53 | LR × LR | D | |
| 7 | 186 | 6 | 27 | Pietrain × LW/LR | E | |
| 8 | 158 | 15 | 43 | Duroc × LW/LR | F | |
| 15 | 166 | 11 | 49 | Pietrain × LW | G | |
| KS-2006-72109 | 10 | 184 | 8 | 57 | Pietrain × LW | G |
| 11 | 177 | 37 | 89 | LW × LR | A | |
| 12 | 146 | 14 | 49 | LR × LW | H | |
| 13b | 173 | 20 | 37 | Duroc × LW/LR | F | |
| 14 | 165 | 8 | 24 | Duroc × LR/LW | C |
LW large white, LR landrace
aGenetic background is defined as pigs from the same breeding company and the same breed cross
bTrial 13 was excluded from analyses due to unusual viremia profiles as seen in Additional file 1: Figure S1