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Abstract

The objective of this work was to verify the presence of genotype-environment interactions (GEI) on the weight adjusted to 365 days of age (W365) for Tabapua cattle in the Northeast of Brazil, using reaction norm (RN) models. The reaction norm model with homogeneous residual variance and 1-step...

Author(s)
Souza, L. de A.; Malhado, C. H. M.; Braccini Neto, J.; Martins Filho, R.; Carneiro, P. L. S.
Publisher
Universidade Federal Rural do Semi-Árido, Rio Grande do Norte, Brazil
Citation
Revista Caatinga, 2016, 29, 1, pp 206-215
AbstractFull Text

The main objective of this study was to apply three-mode principal component analysis to assess the triple interaction (genotype × location × feeding) on direct genetic value for weight at 205 days of age. We used 60 sires with offspring in three regions of northeastern Brazil (Maranhão, Mata and...

Author(s)
Franco, I. L.; Malhado, C. H. M.; Carneiro, P. L. S.; Martins Filho, R.; Pereira, D. G.; Dias, C. T. dos S.
Publisher
Centro de Ciências Rurais, Universidade Federal de Santa Maria, Santa Maria, Brazil
Citation
Ciência Rural, 2012, 42, 12, pp 2252-2258
Abstract

The objective of the present study was to evaluate the genetic structure of Gyr cattle selected for milk production. Files of pedigree and production were composed of 27,610 animals. The ENDOG program was used for the calculation of individual inbreeding coefficient (F) and coefficient of average...

Author(s)
Reis Filho, J. C.; Lopes, P. S.; Verneque, R. da S.; Torres, R. de A.; Teodoro, R. L.; Carneiro, P. L. S.
Publisher
Sociedade Brasileira de Zootecnia, Viçosa, Brazil
Citation
Revista Brasileira de Zootecnia, 2010, 39, 12, pp 2640-2645
AbstractFull Text

This work aimed to estimate the genetic (maternal and direct effects), phenotypic and environmental parameters and trends of the following features; time to reach 160 kg (D160) in the pre-weaning period and time to reach 240 kg (D240) in the post-weaning period for Nellore cattle born between 1980...

Author(s)
Gusmão, F. B. de; Malhado, C. H. M.; Carneiro, P. L. S.; Martins Filho, R.
Publisher
Centro de Ciencias Agrarias da Universidade Federal do Ceara, Ceara, Brazil
Citation
Revista Ciência Agronômica, 2009, 40, 2, pp 301-305
Abstract

The objective of this study was to evaluate the genotype-environment interaction (GEI) in the body weight adjusted to 550 days of age (W550) of Polled Nellore cattle raised in Northeastern Brazil using reaction norms (RN) models. Hierarchical RN models included fixed effects for age of cow (linear...

Author(s)
Ambrosini, D. P.; Carneiro, P. L. S.; Braccini Neto, J.; Martins Filho, R.; Amaral, R. dos S.; Cardoso, F. F.; Malhado, C. H. M.
Publisher
Sociedade Brasileira de Zootecnia, Viçosa, Brazil
Citation
Revista Brasileira de Zootecnia, 2014, 43, 7, pp 351-357
Abstract

The objective of this work was to evaluate the genotype × environment interaction (GEI), for the adjusted weight at 365 days of age, in Polled Nellore cattle from Northeastern Brazil, by using reaction norm models through random regression in a Bayesian approach. The analyzed models included the...

Author(s)
Ambrosini, D. P.; Carneiro, P. L. S.; Braccini Neto, J.; Malhado, C. H. M.; Martins Filho, R.; Cardoso, F. F.
Publisher
Empresa Brasileira de Pesquisa Agropecuária, Brasilia, Brazil
Citation
Pesquisa Agropecuária Brasileira, 2012, 47, 10, pp 1489-1495
Abstract

The objective of this work was to evaluate the population structure and the genetic and phenotypic progress of Nelore cattle in Northern Brazil. Pedigree information concerning animals born between 1942 and 2006 were analyzed. Population structure was performed using the Endog program. Out of the...

Author(s)
Malhado, C. H. M.; Carneiro, P. L. S.; Malhado, A. C. M.; Martins Filho, R.; Bozzi, R.; Ladle, R. J.
Publisher
Embrapa Informacao Tecnologica, Brasil
Citation
Pesquisa Agropecuária Brasileira, 2010, 45, 10, pp 1109-1116
Abstract

The objective of this study was to evaluate the Pure Nelore cattle breed background in the Brazilian Northeastern Sertão region by determining its population structure and quantifying genetic, phenotypic and environmental progress based on ponderal development traits. Pedigree data of animals born...

Author(s)
Malhado, C. H. M.; Carneiro, P. L. S.; Martins Filho, R.; Azevedo, D. M. M. R.
Publisher
Embrapa Informacao Tecnologica, Brasil
Citation
Pesquisa Agropecuária Brasileira, 2009, 44, 7, pp 713-718

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