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AbstractFull Text

Records of 152 145 test-day (TD) milk yields, from 7,317 complete first lactations of Holstein cattle raised in Brazil were analysed. Estimate covariance functions for additive genetic and permanent environmental effects, as well as the genetic parameters for TD milk records using random regression ...

Author(s)
Bignardi, A. B.; El-Faro, L.; Cardoso, V. L.; Machado, P. F.; Albuquerque, L. G.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 01-49
AbstractFull Text

Data from 3,297 Nellore young bulls and heifers, raised under grazing conditions in Southeastern Brazil, were used for estimate genetic parameters for yearling weight (YW), ultrasound Longissimus muscle area (ULMA) and backfat thickness (UFAT) using by restricted maximum likelihood applied to a...

Author(s)
Silva, S. L.; Tarouco, J. T.; Ferraz, J. B. S.; Mourão, G. B.; Roso, V. M.; Balieiro, J. C. C.; Mattos, E. C.; Tarouco, A. K.; Eler, J. P.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 03-84
AbstractFull Text

Data of 3,849 lactations of Guzerat cows from many regions of Brazil were used. Genetic evaluations considered 52 sires tested by progeny (PT) and 40 within MOET nucleus (MN) based on full-sib families. Genetic parameters (GP), breeding values (BV) and reliabilities (R) for milk (MY) and fat (FY)...

Author(s)
Teodoro, R. L.; Peixoto, M. G. C. D.; Verneque, R. S.; Silva, M. V. G. B.; Takamura, A. E.; Martinez, M. L.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 32-23
AbstractFull Text

The objective of the research was to estimate genetic parameters, such as heritabilities and genetic and permanent environmental correlations for nine measures of milk persistency, using the random regression test day model (RRM). The data used were the 395 734 first 3 lactation test day milk yield ...

Author(s)
Cobuci, J. A.; Costa, C. N.; Freitas, A. F.; Teixeira, N. M.; Braccini Neto, J.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 12-06
AbstractFull Text

The objectives of this trial were to compare estimates of (co)variance components and genetic parameters for milk (MY), fat (FY) and protein yields (PY), and for fat (%F) and protein (%P) percentages, in single-trait and three-trait analyses by Bayesian inference. Heritability estimates for MY, FY, ...

Author(s)
Paula, M. C.; Martins, E. N.; Silva, L. O. C.; Oliveira, C. A. L.; Valotto, A. A.; Gasparino, E.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 01-74
Abstract

Records from 2 breeding programmes were used to estimate genetic parameters for age at first calving (AFC) and scrotal circumference (SC) in a crossbred population involving Angus, Hereford, and Nelore breeds. Analyses for AFC were performed using 96.145 heifers offspring of 999 sires and 75.094...

Author(s)
Teixeira, R. A.; Dias, L. T.; Albuquerque, L. G.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 2, 2002, pp 0-3
Abstract

Variance components and genetic parameters of visual scores evaluations of a Nelore beef herd raised in Brazil were estimated so that the information could be used as auxiliary tool in breeding programmes and create scientific knowledge about the criteria applied in cattle shows and exhibitions. A...

Author(s)
Filho, W. K.; Ferraz, J. B. S.; Eler, J. P.; Pineda, N.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 11, 2002, pp 0-4
Abstract

Genetic and phenotypic parameters of body length (Bl), heights at the withers (Hw) and at the hip (Hh), and thoracic perimeter (Tp) were estimated in 1273 adult females of the Canchim (5/8 Charolais + 3/8 zebu) breed, using the restricted maximum likelihood method. The heritability estimates were...

Author(s)
Talhari, F. M.; Alencar, M. M.; Campbell, C.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 2, 2002, pp 0-3
Abstract

The aim of this study was to estimate the additive genetic direct and maternal effects to monthly body weights from birth to yearling of Guzerat cattle breed (n=4920). The calves were weighed monthly from birth to yearling resulting in 12 different sets of data classified according to the following ...

Author(s)
Pelicioni, L. C.; Queiroz, S. A. de; Albuquerque, L. G. de
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 2, 2002, pp 0-4
Abstract

The objective of this study was to estimate genetic parameters for production (weights for 205 and 550 days; W205 and W550, scrotal perimeter at 550 days; SP18) as well as reproduction (true fertility; TF, age at first calving; AFC, calving interval; CI, and calving day; CD) traits in a Nelore herd ...

Author(s)
Silveira, J. C.; McManus, C.; Silva, L. O. C.; Mascioli, A. S.; Silveira, A. C.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 2, 2002, pp 0-4

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