Scrotal circumference assessment and its relevance as predictor of pubertal phase beginning in Angus yearling bulls

Abstract

Pregnancy rates achieved by yearling bulls (15 months old of age) in natural breeding are similar to those obtained by adult breeding males. Reproductive use of yearling bulls involves: a) Lower cost of kilogram produced calf from the commercial herd standpoint because to its lower commercial value when compared to adult bull sale and longer useful lifetime. From seedstock herd view reduce time to sale by 12 months and thus lower cost too. b) Reduces generation interval gaining in genetic progress and selection pressure. c) In heifers, genetic correlations between traits decreases pubertal age. The aim of this work was assessment of scrotal circumference as predictor of pubertal phase start in Angus yearling bulls grown in grassland.