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Information on the crossbreeding parameter estimates involving Nigerian Indigenous pigs and exotic breeds are rare, as well as the best combination for improved growth and conformation traits. A 3×3 diallel cross was conducted among three breeds of pigs – Large White (WW), Landrace (RR) and Nigerian Indigenous pig (NN) breeds. Growth traits measured were body weight at birth (BWB), weaning (BWW at 6 weeks), maturity of 20 weeks (BW20) and average daily gain (ADG up to 20 weeks), while conformation traits were heart girth (HG), height-at-withers (HW), and body length (BL) all at 20 weeks of age. Significant heterotic and maternal effects were reported for BWW, BW20 and ADG. Also significant specific heterosis was recorded only for BW20, with no significant reciprocal effect for the other growth traits measured. Significant heterotic effects for HG and BL were also recorded, while maternal effect was significant only for BL. Significant specific heterosis was recorded for HG, while reciprocal effect was significant only for HW and B. This implies that for growth traits, RR, WW and NN breeds had the best combining ability for BWW, BW20 and ADG respectively with a high positive average heterosis of 0.06, 2.53 and 1.58. This shows that NN breed could elicit attractive economic and environmental benefits when crossbred with exotic ones, in terms of growth traits, as shown by the significant crossbreeding parameter values reported.

ESTIMATES OF CROSSBREEDING PARAMETERS FOR GROWTH AND CONFORMATION TRAITS IN NIGERIAN INDIGENOUS AND EXOTIC PIG BREEDS