全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Fernando Brito Lopes , Cláudio Ulhôa Magnabosco ...
来源:[J].PLoS ONE(IF 3.73), 2017, Vol.8 (9)DOAJ
摘要:Components of (co)variance and genetic parameters were estimated for adjusted weights at ages 120 (W120), 240 (W240), 365 (W365) and 450 (W450) days of Polled Nellore cattle raised on pasture and born between 1987 and 2010. Analyses were performed using an animal model, consideri...
作者:Fernando Brito Lopes , Marcelo Corrêa da Silva ...
来源:[J].PLoS ONE(IF 3.73), 2017, Vol.11 (1)DOAJ
摘要:This research evaluated a multivariate approach as an alternative tool for the purpose of selection regarding expected progeny differences (EPDs). Data were fitted using a multi-trait model and consisted of growth traits (birth weight and weights at 120, 210, 365 and 450 days of ...
作者:Fernando Brito Lopes , Thomas Wayne Murphy ...
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2015, Vol.36 (6Supl2), pp.4613-4626DOAJ
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 rais...
作者:Fernando Brito Lopes , Thaymisson Santos de Lira ...
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2015, Vol.36 (4), pp.2787-2798DOAJ
摘要:Reaction Norm (RN) is the study of genotype-environment interaction (GxE) that complies with alternative ways of genotypes within different environments. This study was carried out to verify GxE by a reaction norm model of weights at 120 (W120) and 210 (W210) days of age in Nello...
作者:Fernando Brito Lopes , Leonardo Sousa Pereira ...
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2015, Vol.36 (3), pp.1713-1724DOAJ
摘要:Random regression models are currently used in genetic evaluation of beef cattle, because they allow changes in the mean and variance of the trait over time as well as estimation of (co) variances between any points along the growth curve. This study aimed to estimate (co)varianc...
作者:Fernando Brito Lopes , Alliny Souza de Assis
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2014, Vol.35 (4), pp.2197-2210DOAJ
摘要:This study was carried out to spatialize climatic factors that best discriminate the states of Maranhão, Pará and Tocantins, to analyze the structure of phenotypic correlation between phenotypic variables weights standardized at 120, 210, 365, 450 and 550 days old and propos...
作者:Fernando Brito Lopes , Geneíldes Cristina de Jesus Santos ...
来源:[J].Revista Ciência Agronômica(IF 0.713), 2012, Vol.43 (2), pp.362-367DOAJ
摘要:Objetivou-se estimar as (co) variâncias, parâmetros e tendências genéticas para as características dias para ganhar 160 kg (D160) na fase pré-desmama, e dias para ganhar 240 kg (D240) na fase pós-desmama, em bovinos da raça Nelore, criados na região Norte do Brasil. For...
作者:Fernando Brito Lopes , Arcadio de los Reyes Borjas ...
来源:[J].Small Ruminant Research(IF 1.124), 2012, Vol.106 (2-3), pp.110-117Elsevier
摘要:Abstract(#br)The aim of this study was to identify traits of socio-economic relevance for intensive and semi-intensive dairy goat production system, to derive economic weights for the breeding goals and to propose selection indices whose criteria are easily collected by dair...
作者:Fernando Brito Lopes , Cláudio Ulhôa Magnabosco ...
来源:[J].SpringerPlus, 2012, Vol.1 (1), pp.1-7Springer
摘要:Abstract(#br)This study was carried out to estimate (co)variance components and genetic parameters for live weight of Nellore cattle from Performance Test of Young Bulls using random regression models. Data of weights and ages of 925 weaned males was used. The animal model includ...

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