Table 1.
Summary of the three data sets studied, containing information regarding the number of pigs used, the genetic line of sows and piglets, the average length of lactation, and type of management
| Item | Data set 1 | Data set 2 | Data set 3 |
|---|---|---|---|
| Number of pigs, n | 1009 | 460 | 1304 |
| Data collection | December 2013–June 2014 | January 2014–August 2014 | September 2015–April 2016 |
| Pig crossbred line | (P × [Ld × Lw]) | (P × [Ld × Lw]) | (P × [Ld × Lw]) |
| Sex | Males and females | Males and females | Males and females |
| Sow line | Ld × Lw (nucleus) | Ld × Lw (Hermitage) | Ld × Lw (Hypor) |
| Length of lactation, d | 21.0 ± 1.54 | 24.9 ± 2.10 | 21.4 ± 2.15 |
| Type of management | Weekly | 3 wk | 4 wk |
| BW recording | Weaning to slaughter | Birth to slaughter | Birth to slaughter |