Table 4 Comparisons of reproductive performances1 between severe repeat-breeder (SRB) and non-SRB sows
Female pigs | ||
|---|---|---|
Non-SRB | SRB | |
Parity | Mean (± SE) | Mean (± SE) |
Farrowing rate for first service in the previous parity, % | ||
Parity 1 | 87.6 (0.54)a | 82.4 (2.07)b |
Parity 2 | 88.6 (0.49) | 84.6 (2.51) |
Parity 3 | 92.4 (0.38) | 96.5 (2.45) |
Parity 4 | 92.9 (0.34) | 89.5 (2.88) |
Parity 5 | 93.2 (0.36) | 93.2 (3.96) |
Parity 6 | 94.5 (0.31) | 93.4 (4.24) |
Weaning-to-first-mating interval in the previous parity, days | ||
Parity 2 | 8.3 (0.19) | 7.5 (0.73) |
Parity 3 | 6.4 (0.10) | 6.8 (0.59) |
Parity 4 | 6.1 (0.10) | 6.3 (0.67) |
Parity 5 | 5.9 (0.10) | 5.2 (0.88) |
Parity 6 | 5.7 (0.09) | 5.6 (0.98) |