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作者:Raysildo Barbosa Lôbo , Fabio Ricardo Pablos de Souza
来源:[J].Livestock Science(IF 1.249), 2018, Vol.214, pp.167-174
摘要:Abstract(#br)In this study were investigated two growth deceleration genetic parameters (gamma and g-ratio) to evaluate alternatives for sire selection for improvements in finishing precocity without promoting changes in adult size. Additionally, were estimated genetic corre...
作者:Raysildo Barbosa Lôbo , Cláudio de Ulhoa Magnabosco ...
来源:[J].Livestock Science(IF 1.249), 2018
摘要:Abstract(#br)This study was carried out to estimate the heritability and genetic correlations between adjusted weights at 210 (W210) and 450 (W450) days of age, scrotal circumference adjusted at 365 (SC365) and 450 (SC450) days of age, age at first calving (AFC), probability...
作者:Raysildo Barbosa Lôbo , Raimundo Martins Filho
来源:[J].Livestock Science(IF 1.249), 2019, Vol.230
摘要:Abstract(#br)The research aim was to evaluate the genotype-environment interactions (GxE) through a study of the reaction norms of Nellore cattle raised in the North and Northeast regions of Brazil at the age at first calving (AFC), with scrotal circumference at 365 and 450 ...
作者:... Marcelo Corrêa da Silva , Eliane Sayuri Miyagi , Raysildo Barbosa Lôbo
来源:[J].PLoS ONE(IF 3.73), 2017, Vol.8 (9)
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:... Eliane Sayuri Miyagi , Raysildo Barbosa Lôbo , Roberto Daniel Sainz
来源:[J].Revista Ciência Agronômica, 2017, Vol.45 (1), pp.168-176
摘要:The objective of the present study was to analyze the phenotypic inter-relationships between growth, feed intake and carcass traits in polled Nellore cattle, as well as to determine which bulls produced the most efficient progeny. The experiment was conducted in the feedlot ...
作者:... Érika Breda Canova , Raysildo Barbosa Lôbo , Claudia Cristina Paro de Paz
来源:[J].Ciência e Agrotecnologia, 2015, Vol.39 (4), pp.355-362
摘要:Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to reproductive efficiency.Thus, it is necessary to study the effectiveness of selection and quantify genetic gain for these traits in herds. This study estimated genetic and phenotypic ...
作者:... Cristiane de Fátima Pereira , Rosiane Pereira da Silva , Raysildo Barbosa Lôbo
来源:[J].Ciência Rural, 2015, Vol.45 (2), pp.317-322
摘要:Objetivou-se estimar as herdabilidades para as características de carcaça de área de olho de lombo (AOL), espessura de gordura subcutânea (EG) e espessura de gordura subcutânea na garupa (EGP8), medidas por ultrassonografia, em bovinos da raça Nelore Mocho, criados em b...
作者:... José Américo Soares Garcia , Raysildo Barbosa Lôbo , Roberto Daniel Sainz
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2015, Vol.36 (3), pp.1713-1724
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:... José Américo Soares Garcia , Raysildo Barbosa Lôbo , Roberto Daniel Sainz
来源:[J].Semina: Ciências Agrárias(IF 0.301), 2015, Vol.36 (4), pp.2787-2798
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...

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