| Piglets production data of 1,252 Pietrain sows (3,583 records), which farrowed from 2004 through 2007 and raised under Thai environmental condition, were used to study the effect of proportion of female piglets born alive (FPB) on number of piglets born alive (NBA), average birth weight of the piglets per litter (BW), average weaning weight of the piglets per litter (WW), and average daily gain of the piglets per litter (ADG). In this study, FPB was defined as the proportion of female to all piglets in a litter, and they were categorized into 5 groups: group 1 (0 < FPB < 20 %), group 2 (20 < FPB < 40 %), group 3 (40 < FPB < 60 %), group 4 (60 < FPB < 80 %) and group 5 (80 < FPB < 100 %). The statistical model composed of year... |
