A total sample of pigs that consisted of 114 Yorkshire (79 females and 35 castrated males), 30 Landrace (19 females and 11 castrated males), and 30 Meishan (16 females and 14 castrated males) was evaluated in this study. The pigs were slaughtered during three age groups 172.6±5.1 d, 174.6±5.4 d, and 176.8±8.8 d, respectively. Backfat thickness was measured at the 11th and last
thoracic vertebrae. The mean of these two measurements was used as the backfat thickness value. The loin eye area was measured at the level of the last rib.