ANIMAL

Estimation of the genetic parameters of 24- and 30-month carcass traits for sire selection

Dae Jung Kim1   Hyung Jun Song2   Seok Hyun Lee2   Jung Jae Lee3   Shil Jin4   Sang Rae Cho4   Sung Sik Kang4   Jeong Il Won4,*   

1Hanwoo Improvement Center, NHABGROUP, Seosan 31948, Korea
2Dairy Cattle Improvement Center, NHABGROUP, Goyang 10292, Korea
3Department of Animal Science and Technology, College of Biotechnology and Natural Resources, Chung-Ang University, Anseong 17546, Korea
4Hanwoo Research Institute, National Institute of Animal Science, RDA, Pyeongchang 25340, Korea

Abstract

This study investigated the possibility of performing selection using 30-month carcass traits by estimating the genetic parameters of 24- and 30-month carcass traits. Data used in this study were the carcass traits of 13,151 heads slaughter at the age of 24 and 30 months. As a result of the study, the heritability of backfat thickness, carcass weight, eye muscle area and marbling score at 24 months of age were estimated to be 0.588, 0.354, 0.467 and 0.587, respectively. The heritability of backfat thickness, carcass weight, eye muscle area and marbling score at 30 months of age were estimated to be 0.498, 0.577, 0.505 and 0.530, respectively. The ranking correlation was 0.516 between the carcass selection indices of 24 and 30 months of age. By providing a 30-month selection index, it is possible to use semen suitable for farm profits, and more semen information can be provided to farms than previously. Furthermore, studies on a selection index based on 30-month carcass traits are needed to provide highly accurate information.

Figures & Tables

Fig. 1. Number of animal by birth year.