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Performance of Purebreed and Crossbred Pigs¹

Mississippi State University, Mississippi State 39762

Abstract

A total of 2,890 records of pigs from 278 litters were used to estimate means for birth weight, weaning weight, pre- and postweaning average daily gain and days from weaning to 95 kg, in crossbred pigs. The crosses involved were 1/2 Duroc-1/2 Yorkshire (D¹ Y¹), 1/2 Hampshire-1/2 Yorkshire (H¹ Y¹), 3/4 Yorkshire-1/4 Duroc (Y³ D¹) and 3/4 Yorkshire-1/4 Hampshire (Y³ H¹). Significant estimates of crossbred pig superiority were found for postweaning average daily gain and for days from weaning to 95 kg in all crosses except the Y³ H¹. None of the crosses exhibited significant superiority for birth weight and only the D¹ Y¹ cross had a significant, positive advantage for weaning weight and preweaning average daily gain. The backcross Y³ H¹pigs showed no significant superiority for any trait when compared to parental means calculated from breed means weighted by breed composition. Y³ D¹ pigs exceeded Y³ H¹ pigs in all measures of performance.

¹ Mississippi Agr. and Forestry Exp. Sta. Journal Article No. 3995.

² Present address: Animal Science Dept., Pennsylvania State Univ., State College.