Parameters and genetic associations of visual scores and weights in Hereford and Braford breeds

Souza, Juliana Stephany de; Silveira, Daniel Duarte da; Teixeira, B. B. M.; Boligon, Arione Augusti

doi:10.1016/j.livsci.2020.104216

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Because of that, incorporating visual evaluation score traits in breeding programs is feasible and can be highly recommended [ 1 ]. In addition, these traits show favorable genetic correlation with other economically important traits such as body weight at different ages [ 4 , 5 ], carcass finishing [ 6 , 7 ], and carcass yield [ 8 , 9 ]. Therefore, these traits may be considered as selection criteria in Nellore cattle breeding programs for improving beef production.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Association Analysis Reveals Novel Loci Related with Visual Score Traits in Nellore Cattle Raised in Pasture–Based Systems

Machado

Brito

Martins

et al. 2022

Animals

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Body conformation traits assessed based on visual scores are widely used in Zebu cattle breeding programs. The aim of this study was to identify genomic regions and biological pathways associated with body conformation (CONF), finishing precocity (PREC), and muscling (MUSC) in Nellore cattle. The measurements based on visual scores were collected in 20,807 animals raised in pasture-based systems in Brazil. In addition, 2775 animals were genotyped using a 35 K SNP chip, which contained 31,737 single nucleotide polymorphisms after quality control. Single-step GWAS was performed using the BLUPF90 software while candidate genes were identified based on the Ensembl Genes 69. PANTHER and REVIGO platforms were used to identify key biological pathways and STRING to create gene networks. Novel candidate genes were revealed associated with CONF, including ALDH9A1, RXRG, RAB2A, and CYP7A1, involved in lipid metabolism. The genes associated with PREC were ELOVL5, PID1, DNER, TRIP12, and PLCB4, which are related to the synthesis of long-chain fatty acids, lipid metabolism, and muscle differentiation. For MUSC, the most important genes associated with muscle development were SEMA6A, TIAM2, UNC5A, and UIMC1. The polymorphisms identified in this study can be incorporated in commercial genotyping panels to improve the accuracy of genomic evaluations for visual scores in beef cattle.

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