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The Crossbred Sire: Experimental Results for Swine^1,2,

Oklahoma State University, Stillwater 74078-0425

Abstract

Experiments aimed at comparing crossbred and purebred boars were reviewed. These experiments showed that crossbred boars matured sexually more quickly than corresponding purebred boars; they exhibited greater testis weight, large ejaculate volume and had better semen quality. Young crossbred boars were more aggressive sexually and achieved a higher conception rate, particularly on first service. Differences between the two types of boars for litter size and weight were generally small and variable in direction. Growth rate, feed efficiency and carcass characteristics of progeny of purebred and crossbred boars were generally similar. In addition, there was little evidence that use of crossbred sires had any effect on variability of pig performance.

¹ Manuscript no. 5040 of the Oklahoma Agr. Exp. Sta., Oklahoma State Univ., Stillwater 74078-0425.

² Presented at a symposium on "The Crossbred Sire" held during the 78th Annual Meeting of ASAS, Kansas State Univ., Manhattan, July 30, 1986.

³ Dept. of Anim. Sci.