Associação genética entre o peso adulto e algumas características produtivas e reprodutivas em bovinos da raça Nelore

Silva, Bárbara da Conceição Abreu

doi:10.11606/d.74.2016.tde-03112016-153053

Cited by 1 publication

(1 citation statement)

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“…Considering that the animals are subjected to the same management conditions, there should be little variation in the environment (Brunes et al 2022). Intensifying selection for yearling weight can influence the adult weight and maintenance requirement of animals (Miranda et al 2006, Silva 2016. To address this problem, selection indexes composed of traits associated with weight and body composition such as carcass and visual scores, leading to precocious animals, are recommended (Brunes et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Genetic parameters for visual scores, growth and carcass traits in Nellore Cattle

SOARES,

BRUNES,

BALDI

et al. 2024

An. Acad. Bras. Ciênc.

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Growth and carcass traits are essential selection criteria for beef cattle breeding programs. However, it is necessary to combine these measurements with body composition traits to meet the demand of the consumer market. This study aimed to estimate the genetic parameters for visual scores, growth (pre and post-weaning weights), and carcass (rib eye area (REA), back and rump fat thickness) traits in Nellore cattle using Bayesian inference. Data from 12,060 animals belonging to the HoRa Hofig Ramos herd were used. Morphological traits were evaluated by the MERCOS methodology. The heritability estimates obtained ranged from low to high magnitude, from 0.15 to 0.28 for visual scores, 0.13 to 0.44 for growth, and from 0.42 to 0.46 for carcass traits. Genetic correlations between visual scores and growth traits were generally of moderate to high magnitudes, however, visual scores showed low correlations with carcass traits, except between sacral bone and structure and REA. Selection for visual score traits can lead to favorable responses in body weight and vice versa, but the same is not true for carcass traits. Morphological categorical traits can be used as complementary tools that add value to selection.

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