巴西内洛尔牛饲料效率与胴体性状的遗传相关性

IF 0.4 4区农林科学 Q4 AGRICULTURE, MULTIDISCIPLINARY

Semina-ciencias Agrarias Pub Date : 2023-02-23 DOI:10.5433/1679-0359.2023v44n1p97

M. Gomes, R. Lôbo, C. Faria

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引用次数: 0

摘要

目的是估计Nellore牛的残余饲料摄入量（RFI）和干物质摄入量（DMI）与胴体光洁度（CF）、肋眼面积（REA）和大理石花纹（MAR）之间的遗传相关性。考虑了7808只动物的数据。此外，还考虑了完整数据库中2261名女性的数据。在动物模型下，通过双性状分析获得方差和协方差分量的估计值，以及遗传力和遗传相关性。RFI（0.22）和DMI（0.29）性状的遗传力估计是中等的。观察到，除RFI和REA（-0.11）外，所有性状的遗传相关性均接近零。然而，考虑到女性群体，RFI和DMI之间的估计遗传相关性增加，尽管仍然是低幅度（-0.30）的有利遗传关联。REA与RFI的遗传关联也有所增加（-0.21）。可以得出结论，RFI和DMI的直接选择不会影响Nellore牛的CF、MAR或REA。然而，这种选择可能会在Nellore雌性的MAR和REA中产生一些有利的反应。

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Genetic correlation between feed efficiency and carcass traits in Nellore cattle in Brazil

The aim was to estimate the genetic correlations between residual feed intake (RFI) and dry matter intake (DMI) with carcass finish (CF), rib eye area (REA), and marbling (MAR) of Nellore cattle. Data from 7,808 animals were considered. In addition, data from 2,261 females included in the complete database were also considered. Estimates of variance and covariance components, as well as heritabilities and genetic correlations were obtained by means of two-character analysis under animal model. Heritability estimates were found to be moderate for the RFI (0.22) and DMI (0.29) traits. It was observed that genetic correlation was close to zero for all traits, except between RFI and REA (-0.11). However, considering the female population, there was an increase in the estimated genetic correlation between RFI and DMI, although still a favorable genetic association of low magnitude (-0.30). There was also an increase in the genetic association of REA with RFI (-0.21). It can be concluded that the direct selection for RFI and DMI will not influence the CF, MAR, or REA of Nellore cattle. However, this selection may generate some favorable responses in MAR and REA in Nellore females.

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来源期刊

Semina-ciencias Agrarias 农林科学-农业综合

CiteScore

1.10

自引率

0.00%

发文量

148

审稿时长

3-6 weeks

期刊介绍： The Journal Semina Ciencias Agrarias (Semina: Cien. Agrar.) is a quarterly publication promoting Science and Technology and is associated with the State University of Londrina. It publishes original and review articles, as well as case reports and communications in the field of Agricultural Sciences, Animal Sciences, Food Sciences and Veterinary Medicine.