A large proportion of genetic variation in cow and ewe body composition is independent of yearling composition

Context Commercial beef and sheep producers have adopted using condition score for management of cows ewes to maximise productivity. Significant premiums are being paid bulls rams with higher-fat breeding values based on young animal measurements, the aim increased resilience in adult female progeny. Aims The this study was quantify relationship between body muscle fat also genetic variation that is independent yearling traits. Methods Published parameters four large data sets from Angus tropically adapted cattle, composite Merino were used partition associated with, or of, composition measures. Key results One standard deviation approximately just 0.1 scores. Approximately ¾ (BCS) weight Conclusions implications Producers need be careful superior traits changing BCS. best way achieve seedstock breeders record report cow ewe