Table 5 Estimates of fixed factors and random effect variance in the models for reproductive efficiency and prolificacy measurements
Sow life annualized piglets weaned | Herd-life annualized piglets weaned | Lifetime piglets weaned | Lifetime piglets born alive | |
|---|---|---|---|---|
Fixed and random effects | Estimate (± SE) | Estimate (± SE) | Estimate (± SE) | Estimate (± SE) |
Intercept | 19.7364 (02965) | 27.6631 (03307) | 57.4532 (1.8624) | 64.1534 (4.1551) |
Age at first-mating | - 0.0295 (0.0008)* | −0.0054 (0.0008)* | −0.0529 (0.0046)* | −0.0548(0.0054)* |
Age at first-mating squared | 0.000009 (0.000007) | −0.0001 (0.000007) | −0.00004 (0.00005) | − 0.00001 (0.00005) |
Herd size groups | ||||
Small herds | 0.3781 (0.4014) | 0.2285 (0.4481) | 2.0886 (2.5230) | 0.0779 (0.0087) |
Age at first-mating x Herd size | ||||
Age at first-mating x Small-to-mid herds | 0.0076 (0.0010)* | 0.0023 (0.0009)* | 0.0402 (0.0055)* | 0.0469 (0.0154)* |
Herd productivity groups | ||||
Ordinary herds | −1.7451 (0.3955)* | −2.3670 (0.4421)* | −4.9031 (2.4883) | −5.0191 (5.8705) |
Age at first-mating x Herd productivity | ||||
Age at first-mating x Ordinary herds | 0.0036 (0.0010)* | 0.0023 (0.0009)* | 0.0012 (0.0051) | −0.03710 (0.0068) |
Herd size x Herd productivity | ||||
Small-to-mid herds x Ordinary herds | −0.6814 (0.4994) | −1.2828 (0.5571)* | −0.1372 (3.1372) | − 0.4006 (3.9637) |
Intercept variance at herd level | 1.03 | 1.34 | 42.0 | 67.5 |
ICC (records within the same herd), % | 4.0 | 4.4 | 5.1 | 5.8 |