Journal of Animal Breeding and Genomics (J Anim Breed Genom)
Seon-Ah Kwon1†, Ha-Seung Seong2†, Jae-Gwon Kim1, Joo-Young Lee3, Chang-Woo Lee4, Dong-Woo Ha5, Jong-Bok Kim1, Jung-Woo Choi1*, Won-Hyong Chung1*
1Department of Animal Science, Kangwon National University, Chuncheon 24341, Korea
2Animal Genetics & Breeding Division, Rural Development Administration National Institute of Animal Science, Cheonan, 31000, Korea
3Hoengseong Agricultural technology & Extension Center, Hoengseong county office, Hoengseong, 25208, Korea
4Gangwon Provincial Livestock Research Center, Hoengseong 25266, Korea
5Hanwoo Breeding Department, Korea Animal Improvement Association, Seocho, 06668, Korea
Correspondence to Won-Hyong Chung, E-mail: whchung@kangwon.ac.kr
†These authors contributed equally to this work.
Volume 8, Number 4, Pages 175-185, December 2024.
Journal of Animal Breeding and Genomics 2024, 8(4), 175-185. https://doi.org/10.12972/jabng.20240410
Received on 25 October, 2024, Revised on 16 December, 2024, Accepted on 20 December, 2024, Published on 31 December, 2024.
Copyright © 2024 Korean Society of Animal Breeding and Genetics.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0).
One of the main objectives of this study was to compare the differences of mean phenotypic values among steer progeny from 632 Korean proven bulls (KPN) with respect to their sire grade. Each sire was classified into one of the four grades (A, B, C, and D) on the quartiles of total index calculated by adding standardizing estimated breeding values (EBVs) for carcass weight (CWT), backfat thickness (BFT), eye muscle area (EMA), and marbling score (MAR), giving weights of 1: -1: 1: 1, respectively. The EBVs of sires were derived from the slaughter records of 289,606 Hanwoo cows and steers, while the comparison of progeny means by sire grade was conducted on the slaughter records of 369,580 steers. Comparisons were conducted via Tukey’s method following analysis of variance using a linear model that incorporated fixed effect of sire’s grade, contemporary group, and linear and quadratic effect of slaughter age. Significant differences of progeny means between sire grades were observed in most paired comparisons (p<0.05). The mean differences between progeny from the highest (Grade A) and lowest (Grade D) sire grades were 27.83kg for CWT, -1.16mm for BFT, 7.46cm² for EMA, and 0.91 for MAR. These results underscore the substantial impact of sire’s EBV on the progeny phenotype. Furthermore, providing genetic values of KPN, not only the EBVs but also the evaluated grades based on total index, is expected to enhance Hanwoo breeding programs of farms.
Hanwoo, Estimated breeding value, Carcass Trait
이 논문은 2024년도 강원대학교 대학회계의 지원을 받아 수행한 연구임.
본 연구는 한우암소검정사업을 주관하는 농협경제지주 한우개량사업소 및 한국종축개량협회로부터 자료를 제공받아 수행한 연구임.
No potential conflict of interest relevant to this article is reported.
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