ISSN: 0041-3216

ISSN: 0041-3216 (Online), 0041-3216 (Print)
Volume 71 Number 1
Research Notes
Direct genetic and additive maternal effects on swine litter size and weight in a tropical environment
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Litter records (totalling 1323) of Large White (LW) and Landrace (LR) pigs and their F1 crosses were analysed to evaluate the direct genetic and additive maternal effects on pre-weaning litter size and weight. Direct genetic effects were important for most litter traits studied. Additive maternal differences were observed for litter weight at 3 weeks of age favouring the crossbreds with LR dams. Direct heterosis effects for litter size and weight at birth were not significant.
Keywords: Direct effects; Additive maternal effects; Litter size; Litter weight