Other Statistics and Probability Commons^™

Pregnancy Rate And First-Service Conception Rate In Angus Heifers, J. Minick Bormann, L. R. Totir, Stephen D. Kachman, R. L. Fernando, D. E. Wilson

Department of Statistics: Faculty Publications

The objective of this project was to determine the genetic control of conception rate, or pregnancy percentage in Angus beef heifers. Producers from 6 herds in 5 states provided 3,144 heifer records that included breeding dates, breeding contemporary groups, service sires, and pregnancy check information. Two hundred fourteen sires of the heifers were represented; with 104 sires having less than 5 progeny, and 14 sires having greater than 50 progeny. These data were combined with performance and pedigree information, including actual and adjusted birth weights, weaning weights, and yearling weights, from the American Angus Association database. Heifer pregnancy rate varied …