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AbstractFull Text

We aimed to evaluate different orders of fixed and random effects in random regression models (RRM) based on Legendre orthogonal polynomials as well as to verify the feasibility of these models to describe growth curves in Nellore cattle. The proposed RRM were also compared to multi-trait models...

Author(s)
Teixeira, B. B.; Mota, R. R.; Lôbo, R. B.; Silva, L. P. da; Carneiro, A. P. S.; Silva, F. G. da; Caetano, G. da C.; Fonseca e Silva, F.
Publisher
Czech Academy of Agricultural Sciences, Prague, Czech Republic
Citation
Czech Journal of Animal Science, 2018, 63, 6, pp 212-221
Abstract

The Guzerá National Milk Improvement Programme is a work carried out by Embrapa Gado de Leite and the Brazilian Centre for Genetic Improvement of Guzerá. It involves the participation of several public and private orgranizations. This programme is based on the integration of modern animal breeding...

Author(s)
Bruneli, F. A. T.; Peixoto, M. G. C. D.; Santos, G. G. dos; Arbex, W. A.; Penna, V. M.; Zadra, L. E. F.; Josahkian, L. A.; Verneque, R. da S.; Machado, M. A.; Panetto, J. C. do C.; Lôbo, R. B.; Carvalho, M. R. S.
Publisher
Embrapa Gado de Leite, Juiz de Fora, Brazil
Citation
Documentos - Embrapa Gado de Leite, 2018, No.218, pp 77 pp.
Abstract

The objective of this study was to evaluate the effect of the genetic component on the phenotypic expression of productive traits of Nellore cattle submitted to the individual performance test. The data used came from 51 young bulls participating in the individual performance test of Nellore bulls...

Author(s)
Faria, C. U.; Pereira, C. de F.; Silva, R. P. da; Pessoa, D. D.; Magnabosco, C. U.; Lôbo, R. B.
Publisher
Universidade Federal de Goiás, Escola de Veterinária, Goiânia, Brazil
Citation
Ciência Animal Brasileira, 2017, 18, pp e-30528
Abstract

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 parameters and...

Author(s)
Moreira, H. L.; Buzanskas, M. E.; Munari, D. P.; Canova, É. B.; Lôbo, R. B.; Paz, C. C. P. de
Publisher
Universidade Federal de Lavras, Lavras, Brazil
Citation
Ciência e Agrotecnologia, 2015, 39, 4, pp 355-362
AbstractFull Text

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)variances and genetic...

Author(s)
Ferreira, J. L.; Lopes, F. B.; Pereira, L. de S.; Nepomuceno, L. L.; Garcia, J. A. S.; Lôbo, R. B.; Sainz, R. D.
Publisher
Universidade Estadual de Londrina, Londrina, Brazil
Citation
Semina: Ciências Agrárias (Londrina), 2015, 36, 3, pp 1713-1723
Abstract

The objective of this study was to estimate heritabilities and genetic and phenotypic correlations for gestation length as calf trait (GLcalf) and preweaning [birth weight (BW) and weights at 120 (W120) and 210 (W210) days] and postweaning performance traits [weights at 365 (W365) and 450 (W450)...

Author(s)
Moreira, H. L.; Canova, É. B.; Munari, D. P.; Bezerra, L. A. F.; Lôbo, R. B.; Paz, C. C. P. de
Publisher
Departmento da Producao Animal, Secretaria da Agricultura, Industria e Comercio, Sao Paulo, Brazil
Citation
Boletim de Indústria Animal, 2015, 72, 2, pp 130-135
AbstractFull Text

Reaction Norm (RN) is the study of genotype-environment interaction (G × E) that complies with alternative ways of genotypes within different environments. This study was carried out to verify G × E by a reaction norm model of weights at 120 (W120) and 210 (W210) days of age in Nellore cattle...

Author(s)
Ferreira, J. L.; Lopes, F. B.; Lira, T. S. de; Garcia, J. A. S.; Lôbo, R. B.; Sainz, R. D.
Publisher
Universidade Estadual de Londrina, Londrina, Brazil
Citation
Semina: Ciências Agrárias (Londrina), 2015, 36, 4, pp 2787-2797
AbstractFull Text

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 propose phenotypic indices for ...

Author(s)
Ferreira, J. L.; Lopes, F. B.; Assis, A. S. de; Lôbo, R. B.
Publisher
Universidade Estadual de Londrina, Londrina, Brazil
Citation
Semina: Ciências Agrárias (Londrina), 2014, 35, 4, pp 2197-2210
Abstract

A total of 204,912 records of birth weights up to 550 days of age, of 24,890 Nellore cattle, offspring of 375 sires and 16,917 dams from five herds in the state of Mato Grosso, Brazil, were used in order to describe the variability of the weight development by random regression models. The model...

Author(s)
Silva, T. B. R. da; Araújo, C. V. de; Bittencourt, T. C. B. dos S. C. de; Araújo, S. I.; Lôbo, R. B.; Bezerra, L. A. F.; Silva, D. A. da; Silva, A. A. da
Publisher
Sociedade Brasileira de Zootecnia, Viçosa, Brazil
Citation
Revista Brasileira de Zootecnia, 2013, 42, 4, pp 254-258
Abstract

(Co)variances, heritability and genetics change were estimated for weight at 120 (W120), 210 (W210), 365 (W365), 450 (W450) and 550 (W550) days of age in Nellore cattle from the Humid Tropical region of Brazil. A total of 65,876 records of animals born between 1993 to 2010 and raised on pasture...

Author(s)
Lira, T. S. de; Pereira, L. de S.; Lopes, F. B.; Ferreira, J. L.; Lôbo, R. B.; Santos, G. C. de J.
Publisher
Universidade Federal de Goiás, Escola de Veterinária, Goiânia, Brazil
Citation
Ciência Animal Brasileira, 2013, 14, 1, pp 23-31

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