Genetic correlation estimates between visual scores and carcass traits measured by ultrasound in Nelore cattle using linear-threshold bayesian models

Revista Brasileira de Zootecnia

Lôbo, Raysildo Barbosa¹  Bezerra, Luiz Antônio Framartino¹  Albuquerque, Lucia Galvão de³  Faria, Carina Ubirajara de²  Magnabosco, Cláudio de Ulhôa⁴ 

[1] USP;UFU;UNESP, Jaboticabal;Embrapa Cerrados/Arroz e Feijão

关键词: genetic parameters;    gibbs sampling;    morphological traits;    Zebu cattle     Introdução A seleção para precocidade de acabamento é um assunto em evidência em estudos com bovinos de corte;    pois o encurtamento do ciclo de produção;    sobretudo em sistemas a pasto seria um grande passo para a bovinocultura de corte brasileira aperfeiçoar seus índices produtivos;   

DOI  :  10.1590/S1516-35982009001100011

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to estimate the genetic correlations between visual scores and the carcass traits measured by ultrasound, in Nellore breed cattle, using the bayesian statistics by Gibbs Sampling, in the linear-threshold model. The morphological categorical traits of musculature, physical structure, conformation and sacrum were studied, evaluated at 15 and 22 months. The carcass traits of the longissimus muscle area, backfat thickness, rump fat thickness and hip height were evaluated. Visual scores should be used as selection criterion to increase genetic progress for the longissumus muscle area. The estimates of genetic correlations obtained between musculature and backfat thickness and rump fat thickness indicated that the selection for musculature may lead to animals with better carcass finishing. Selection for physical structure and conformation, at 15 and 22 months, should promote response correlated with the hip height.

【 授权许可】

CC BY-NC