Bivariate analysis for the improvement of genetic evaluations with incomplete records in Charolais cattle

IF 0.4 4区农林科学 Q4 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Revista Mvz Cordoba Pub Date : 2021-03-17 DOI:10.21897/RMVZ.2128

Jessica Beatriz Herrera-Ojeda, G. M. Parra-Bracamonte, N. López-Villalobos, J. Herrera-Camacho, K. E. Orozco-Durán

引用次数: 0

Abstract

Objective: Estimate (co)variance components and genetic parameters of live weight traits and examine the effect of selection culling when using bivariate analysis in registered Charolais beef cattle. Materials and methods: The effect of incomplete data over accuracies was compared, expected progeny differences (EPD) and standard errors of prediction (SEP) were obtained and evaluated by comparing univariate and bivariate models for birth (BW), weaning (WW) and yearling (YW) weights. Results: Bivariate models for WW and YW, improved accuracies of EPDs and reduced the SEPs. Joint analysis for BW and WW increased in a 38% the accuracies and reduced SEP estimators for YW (p<0.001). Accuracies of EPD for BW obtained from univariate models were improved when BW was included in bivariate models. Conclusions: The results support the use of bivariate genetic analysis in limited or incomplete live weight indicators databases that were registered after birth, such as weaning and yearling weight.

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夏来牛不完全记录遗传评价改进的双变量分析

目的:利用双变量分析方法估计夏来肉牛活重性状的co方差成分和遗传参数，并检验选择剔除的效果。材料与方法:比较不完整数据对准确性的影响，通过比较出生体重(BW)、断奶体重(WW)和一岁体重(YW)的单变量和双变量模型，获得并评价预期子代差异(EPD)和预测标准误差(SEP)。结果:WW和YW的二元模型提高了epd的准确性，降低了sep。BW和WW的联合分析提高了38%的准确率，降低了YW的SEP估计值(p<0.001)。在二元模型中加入体重，可以提高单变量模型中体重的EPD精度。结论:该结果支持在出生后登记的有限或不完整的活重指标数据库(如断奶和一岁体重)中使用双变量遗传分析。

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

Revista Mvz Cordoba 农林科学-奶制品与动物科学

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal MVZ Córdoba is an open access international scientific journal financed and edited by the University of Córdoba (Colombia). The journal publishes quarterly, continuously in PDF, XML, Epub, original articles, literature reviews, brief communications and clinical cases, peer-reviewed (double-blind) in Spanish and English, which are related to the agricultural and veterinary sciences. The journal is directed to natural and legal persons of veterinary medicine, animal husbandry, public health, epidemiology, aquaculture, biology, basic biomedical sciences and biotechnology and constitutes a space for academic and scientific discussion around the work of professionals in Veterinary Medicine and Zootechnics. Four-monthly publication. "The Journal MVZ Córdoba supports the policies for registration of clinical trials of the World Health Organization (WHO) and the International Committee of Medical Journal Editors (ICMJE), since it recognizes the importance of these initiatives for international registration and dissemination. of information about clinical studies, in open access. As a result, since 2007, the journal MVZ Córdoba only publishes clinical research articles that have received an identification number in one of the Clinical Trial Registries validated by the criteria established by WHO and ICMJE, whose addresses are available in the ICMJE website. The identification number is recorded at the end of the summary. "