Journal of Animal Breeding and Genomics (J Anim Breed Genom)
Jae Kwang Noh1, Sung Jin Kim1, Ji Hyun Son1, Tae Jeong Choi2, Chang Hee Do3, Yang-Mo Koo1*
1Korea Animal Improvement Association, Seocho, 06668, Korea
2Animal Genetics & Breeding Division, NIAS, Cheonan, 31000, Korea
3Chungnam National University, Daejeon, 34134, Korea
Correspondence to Yang-Mo Koo, E-mail: greatman009@gmail.com
Volume 7, Number 3, Pages 55-64, September 2023.
Journal of Animal Breeding and Genomics 2023, 7(3), 55-64. https://doi.org/10.12972/jabng.20230007
Received on 26 May, 2023, Revised on 29 June, 2023, Accepted on 27 July, 2023, Published on 30 September, 2023.
Copyright © 2023 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).
This study aimed to investigate the correlation between the linear type traits of mother cows (dams) and the birth weight(BW) of the progeny. The study used data collected between 2002 and 2018 by the Korea Animal Improvement Association (KAIA). This study evaluated the data specifically with respect to 19 traits. A statistical model was established to estimate the correlation between the maternal linear classification traits and the progeny BW. The significance of each statistical variable was analyzed using the generalized linear model (GLM) method in the SAS package 9.1.3 software, while the genetic parameters were estimated using the BLUPF90 Family program. The BW of Hanwoo cows increased by approximately 0.4 kg each year; however, the BW heritability was moderate (0.23). The linear classification traits showed values of 0.34, 0.37, 0.11, 0.45, 0.31, and 0.40, for ST (Vertical distance from the apex of the rump to the ground), BL (Horizontal distance between anterior shoulder point to the posterior extremity of the pin bone), RA (The slope from the rump to the pin bone), RL (Horizontal distance from the anterior rump to the tip of the pin bone), PBW (Lateral width of pin bone), and FS (Final score), respectively, with moderate heritability for all traits, except RA. The BW of the progeny showed phenotypic correlations of 0.06, -0.01, 0.03, and 0.04, and genetic correlations of 0.09, 0.03, 0.02, and -0.04 with ST, BL, RL, and PBW, respectively. The average parity in Hanwoo cows increased from 2.5 in 2016 to 2.8 in June 2020. There is a low genetic correlation between the maternal linear classification traits and the BW of the progeny. An increase in the parity of dams and a greater accumulation of progeny BW data and test records could lead to the accurate evaluation of the BW as a breeding objective trait.
linear type traits, birth weight, genetic parameters, Hanwoo cows, parity, economic trait
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