Estimation of genetic correlations and genomic prediction accuracy for reproductive and carcass traits in Hanwoo cows.

IF 2.7 3区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Journal of Animal Science and Technology Pub Date : 2024-07-01 Epub Date: 2024-07-31 DOI:10.5187/jast.2024.e75
Md Azizul Haque, Asif Iqbal, Mohammad Zahangir Alam, Yun-Mi Lee, Jae-Jung Ha, Jong-Joo Kim
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引用次数: 0

Abstract

This study estimated the heritabilities (h2) and genetic and phenotypic correlations between reproductive traits, including calving interval (CI), age at first calving (AFC), gestation length (GL), number of artificial inseminations per conception (NAIPC), and carcass traits, including carcass weight (CWT), eye muscle area (EMA), backfat thickness (BF), and marbling score (MS) in Korean Hanwoo cows. In addition, the accuracy of genomic predictions of breeding values was evaluated by applying the genomic best linear unbiased prediction (GBLUP) and the weighted GBLUP (WGBLUP) method. The phenotypic data for reproductive and carcass traits were collected from 1,544 Hanwoo cows, and all animals were genotyped using Illumina Bovine 50K single nucleotide polymorphism (SNP) chip. The genetic parameters were estimated using a multi-trait animal model using the MTG2 program. The estimated h2 for CI, AFC, GL, NAIPC, CWT, EMA, BF, and MS were 0.10, 0.13, 0.17, 0.11, 0.37, 0.35, 0.27, and 0.45, respectively, according to the GBLUP model. The GBLUP accuracy estimates ranged from 0.51 to 0.74, while the WGBLUP accuracy estimates for the traits under study ranged from 0.51 to 0.79. Strong and favorable genetic correlations were observed between GL and NAIPC (0.61), CWT and EMA (0.60), NAIPC and CWT (0.49), AFC and CWT (0.48), CI and GL (0.36), BF and MS (0.35), NAIPC and EMA (0.35), CI and BF (0.30), EMA and MS (0.28), CI and AFC (0.26), AFC and EMA (0.24), and AFC and BF (0.21). The present study identified low to moderate positive genetic correlations between reproductive and CWT traits, suggesting that a heavier body weight may lead to a longer CI, AFC, GL, and NAIPC. The moderately positive genetic correlation between CWT and AFC, and NAIPC, with a phenotypic correlation of nearly zero, suggesting that the genotype-environment interactions are more likely to be responsible for the phenotypic manifestation of these traits. As a result, the inclusion of these traits by breeders as selection criteria may present a good opportunity for developing a selection index to increase the response to the selection and identification of candidate animals, which can result in significantly increased profitability of production systems.

汉和奶牛繁殖和胴体性状遗传相关性和基因组预测准确性的估计。
本研究估算了韩国汉宇(Hanwoo)奶牛繁殖性状(包括产犊间隔(CI)、初产犊年龄(AFC)、妊娠期(GL)、每次受孕人工授精次数(NAIPC))与胴体性状(包括胴体重(CWT)、眼肌面积(EMA)、背膘厚(BF)和大理石纹评分(MS))之间的遗传力(h2)以及遗传和表型相关性。此外,还采用基因组最佳线性无偏预测法(GBLUP)和加权 GBLUP 法(WGBLUP)评估了基因组预测育种值的准确性。从 1,544 头汉宇奶牛身上收集了繁殖和胴体性状的表型数据,并使用 Illumina Bovine 50K 单核苷酸多态性(SNP)芯片对所有动物进行了基因分型。利用 MTG2 程序的多性状动物模型估算了遗传参数。根据 GBLUP 模型,CI、AFC、GL、NAIPC、CWT、EMA、BF 和 MS 的估计 h2 分别为 0.10、0.13、0.17、0.11、0.37、0.35、0.27 和 0.45。GBLUP 的准确度估计值在 0.51 至 0.74 之间,而 WGBLUP 对所研究性状的准确度估计值在 0.51 至 0.79 之间。在 GL 与 NAIPC(0.61)、CWT 与 EMA(0.60)、NAIPC 与 CWT(0.49)、AFC 与 CWT(0.48)、CI 和 GL(0.36)、BF 和 MS(0.35)、NAIPC 和 EMA(0.35)、CI 和 BF(0.30)、EMA 和 MS(0.28)、CI 和 AFC(0.26)、AFC 和 EMA(0.24)以及 AFC 和 BF(0.21)。本研究发现繁殖性状和 CWT 性状之间存在低到中等程度的正遗传相关性,这表明体重越重,CI、AFC、GL 和 NAIPC 的寿命越长。CWT与AFC和NAIPC之间的遗传相关性为中度正相关,而表型相关性几乎为零,这表明基因型与环境之间的相互作用更有可能导致这些性状的表型表现。因此,育种者将这些性状作为选择标准可能是开发选择指数的良机,以提高候选动物的选择和鉴定反应,从而显著提高生产系统的收益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Animal Science and Technology
Journal of Animal Science and Technology Agricultural and Biological Sciences-Food Science
CiteScore
4.50
自引率
8.70%
发文量
96
审稿时长
7 weeks
期刊介绍: Journal of Animal Science and Technology (J. Anim. Sci. Technol. or JAST) is a peer-reviewed, open access journal publishing original research, review articles and notes in all fields of animal science. Topics covered by the journal include: genetics and breeding, physiology, nutrition of monogastric animals, nutrition of ruminants, animal products (milk, meat, eggs and their by-products) and their processing, grasslands and roughages, livestock environment, animal biotechnology, animal behavior and welfare. Articles generally report research involving beef cattle, dairy cattle, pigs, companion animals, goats, horses, and sheep. However, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will also be considered for publication. The Journal of Animal Science and Technology (J. Anim. Technol. or JAST) has been the official journal of The Korean Society of Animal Science and Technology (KSAST) since 2000, formerly known as The Korean Journal of Animal Sciences (launched in 1956).
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