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Preweaning Breed-of-Sire Comparisons Involving The Senepol Breed of Cattle^1,2,3,4,

University of Kentucky, Lexington 40546-0215 and Louisiana State University, Baton Rouge 70803-4210

Abstract

Preweaning data collected at two locations (Kentucky, Louisiana) were utilized to evaluate breed-of-sire comparisons involving the Senepol breed of cattle. For the Kentucky study, calves sired by Senepol bulls were 1.3 kg heavier (P<.05) at birth than calves sired by Hereford bulls; however, weaning weights were similar for the two sire groups. For the Louisiana study, calves sired by Longhorn bulls were 5.3 kg lighter (P<.01) at birth, 20 kg lighter (P<.01) at weaning and had weaning condition scores .5 unit less (P<.01) than the average of calves sired by Red Poll and Senepol bulls. Also, heifers exposed to Longhorn bulls weaned 23 kg less (P<.01) calf per heifer exposed than the average of heifers exposed to Red Poll and Senepol bulls. Calves sired by Red Poll bulls were 1.2 kg heavier (P<.01) at birth and 12 kg heavier (P<.01) at weaning than those sired by Senepol bulls; however, the Senepol-sired calves received higher (P<.01) condition scores at weaning. Heifers exposed to Red Poll bulls weaned 20 kg more (P<.05) calf per heifer exposed than did heifers exposed to Senepol bulls.

¹ Published with approval of Director of Kentucky Agr. Exp. Sta. as Journal Article 85-5-155.

² Published with approval of Director of Louisiana Agr. Exp. Sta., Baton Rouge.

³ A publication of Southern Regional Beef Cattle Breeding Project, S-10.

⁴ Appreciation is expressed to Mint Springs Farm, Versailles, KY for providing the Senepol bulls for this study. Also, appreciation is expressed to Bonnie and Bert Jolly, Sonora, KY for their cooperation in the Kentucky Study.

⁵ Dept. of Anim. Sci., Univ. of Kentucky, Lexington.

⁶ Louisiana Agr. Exp. Sta., Louisiana State Univ. Agr. Center, Baton Rouge.

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