Effect of selection for leanness on overall reproductive performance in Large White sows

摘要: Reproductive records from 1072 Large White sows (3589 litters) were used to examine the effect of backfat depth (Ed) and live weight (Lw) at selection on first litter lifetime reproductive performance. The variables investigated included mating age, total piglets born, bent alive, piglet birth weight, number weaned weaned, weaning remating period litters produced. Using depth, categorized into three groups: L, 9 13 mm; M, 14 16 F, greater than or equal 17 mm. Ed had no significant (P > 0.05) measured traits for grouped by fat parity. When data analysed, L group fewer < 0.05), pigs 0.01) either rite M F group. significantly higher other groups. suggest that performance souls is not as good sows.