Reaction norms in weights at 365 days old in nellore bulls in northern Brazil
作者: Jorge Luís FerreiraAlliny Souza de AssisFernando Brito LopesThomas Wayne MurphyMarcelo Corrêa da SilvaJosé Américo Soares GarciaEdnira Gleida Marques
作者单位: 1Universidade Federal do Tocantins
2Universidade Federal de Goiás, Escola de Veterinária e Zootecnia
3University of Wisconsin
4Universidade Federal de Goiás,Escola de Veterinária e Zootecnia
5Faculdade de Agronomia e Veterinária, Universidade de Brasilia
6Associação Brasileira dos Criadores de Zebu
刊名: Semina: Ciências Agrárias, 2015, Vol.36 (6Supl2), pp.4613-4626
来源数据库: Directory of Open Access Journals
DOI: 10.5433/1679-0359.2015v36n6Sup2p4613
关键词: CrescimentoMelhoramento genético animalRegressão aleatória.
原始语种摘要: Genotype by environment interaction (GxE) studies are of particular interest in Brazil because of the regional diversity of environmental effects and the wide variety of management systems. The present study evaluates GxE effects on 365 d weight (365W) of Nellore cattle raised on pasture in northern Brazil. The analysis utilized random regression techniques to model the reaction norm. Fixed effects consisted of sex, contemporary group, and the covariate of age of cow at calving. The environmental gradient, defined by the concatenation of a bull and the state in which the calf was born, was modeled by second order Legendre polynomials. Direct additive genetic and residual effects were fit as random. Results showed differences in the magnitude of expression of genotype in proportion to...
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  • weights 法码
  • environment 环境
  • Brazil 巴西
  • intercept 截断
  • regional 地方的
  • northern 北方的
  • genetic 遗传的
  • technical 技术的
  • management 管理
  • particular 细致的