Scholarlink

<p>The aim of this study was to evaluate the genotype-environment interaction and its impact on the genetic evaluation of sires for body weight traits in Nellore cattle. Records of standardized weights at 120 (W120), 210 (W210), 365 (W365), and 450 (W450) days of age were used for 28,570 Nelore cattle, the progeny of 179 sires and 17,998 dams from herds in the states of Mato Grosso, Mato Grosso do Sul, and Goiás. The months of birth of animals were grouped into seasons that corresponded to the months with the lowest and highest rainfall. The variance components and prediction of breeding values of the animals were estimated. As a result, the posterior means of additive genetic variance components for W120 and W210 were higher in Mato Grosso compared to Mato Grosso do Sul and Goiás and which single-trait model. Posterior means of direct heritability’s for W120 and W210 were higher in Mato Grosso. Regarding yearly (W365) and yearling (W450) weights, the posterior means of the additive genetic variance components for Goiás were higher than those for Mato Grosso and Mato Grosso do Sul and for the single-trait model. The state of Mato Grosso, in turn, was the one that presented the posterior mean of the higher residual variance component for W450. Posterior regression coefficients for W120 and W210 indicated that the breeding values of the sires were underestimated by the single-trait model in the state of Mato Grosso. Spearman's and additive genetic correlation coefficient values indicated changes between the ranking of sires for body weights, especially between Mato Grosso (MT) and Mato Grosso do Sul (MS). It is concluded that there is a presence of GxE on the selection criteria for the weight development of Nelore cattle in the Midwest Region of Brazil.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of the genotype and environment interaction on body weight traits in Nelore cattle (Bos indicus)

  • 期刊论文

  • 发表日期：

    2025年6月16日

查看全文
  • Raimundo Nonato Colares Camargo-Júnior,
  • Cláudio Vieira de Araújo,
  • Caio de Souza Teixeira,
  • Simone Inoe de Araújo,
  • Raysildo Barbosa Lôbo,
  • Lílian Roberta Matimoto Nakabashi,
  • Letícia M. Mendes de Castro,
  • Flávio Luiz Menezes,
  • André Guimarães Maciel e Silva,
  • José Ribamar Felipe Marques,
  • Welligton Conceição da Silva,
  • Marco Aurélio Lopes Della Flora,
  • Hipócrates de Menezes Chalkidis,
  • Carlos Eduardo Lima Sousa,
  • Éder Bruno Rebelo da Silva,
  • Jamile Andréa Rodrigues da Silva,
  • José de Brito Lourenço-Júnior

摘要

The aim of this study was to evaluate the genotype-environment interaction and its impact on the genetic evaluation of sires for body weight traits in Nellore cattle. Records of standardized weights at 120 (W120), 210 (W210), 365 (W365), and 450 (W450) days of age were used for 28,570 Nelore cattle, the progeny of 179 sires and 17,998 dams from herds in the states of Mato Grosso, Mato Grosso do Sul, and Goiás. The months of birth of animals were grouped into seasons that corresponded to the months with the lowest and highest rainfall. The variance components and prediction of breeding values of the animals were estimated. As a result, the posterior means of additive genetic variance components for W120 and W210 were higher in Mato Grosso compared to Mato Grosso do Sul and Goiás and which single-trait model. Posterior means of direct heritability’s for W120 and W210 were higher in Mato Grosso. Regarding yearly (W365) and yearling (W450) weights, the posterior means of the additive genetic variance components for Goiás were higher than those for Mato Grosso and Mato Grosso do Sul and for the single-trait model. The state of Mato Grosso, in turn, was the one that presented the posterior mean of the higher residual variance component for W450. Posterior regression coefficients for W120 and W210 indicated that the breeding values of the sires were underestimated by the single-trait model in the state of Mato Grosso. Spearman's and additive genetic correlation coefficient values indicated changes between the ranking of sires for body weights, especially between Mato Grosso (MT) and Mato Grosso do Sul (MS). It is concluded that there is a presence of GxE on the selection criteria for the weight development of Nelore cattle in the Midwest Region of Brazil.