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Abstract

We compared different Bayesian models to handle censored data for genetic parameters estimation of age at first calving (AFC) in Brazilian Brahman cattle. Data from females with AFC above 1825 days of age were assumed to have failed to calve and were considered as censored records. Data including...

Author(s)
Fernandes Lázaro, S.; Varona, L.; Fonseca e Silva, F.; Ventura, H. T.; Veroneze, R.; Brito, L. C.; Costa, E. V.; Sávio Lopes, P.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2019, 221, pp 177-180
Abstract

The present study aimed to evaluate the reproductive efficiency and establish the incidence of reproductive diseases in Nelore (pure breed) animals via rectal palpation in cows and a retrospective survey, through property records, obtaining days open (DO) and calving interval (CI). The DO and CI...

Author(s)
Minervino, A. H. H.; Ribeiro, H. F. L.; Neves, K. A. L.; Morini, A. C.; Barrêto Júnior, R. A.; Araújo, C. A. S. C.; Vale, W. G.
Publisher
Universidade Federal Rural de Pernambuco, Recife, Brazil
Citation
Medicina Veterinária (Brasil), 2019, 13, 1, pp 109-116
Abstract

The objective was to estimate genetic correlations for persistency, milk yield and somatic cell score (SCS) in Holstein cattle in Brazil. A dataset with 190389 records of test-day milk and of test-day SCS from 21824 cows was used. Two-trait random regression model with a fourth order Legendre...

Author(s)
Padilha, A. H.; Alfonzo, E. P. M.; Daltro, D. S.; Torres, H. A. L.; Braccini Neto, J.; Cobuci, J. A.
Publisher
CSIRO, Collingwood, Australia
Citation
Animal Production Science, 2019, 59, 2, pp 207-215
Abstract

The objective of this study was to investigate the population genetic structure and the effects of inbreeding on growth traits of Nellore breed animals from the Amazon biome. The database used for the analyzes contained records of 1,402,287 animals born between the years of 1950 and 2012 and weight ...

Author(s)
Dotta, J. C.; Falcão, A. J. da S.; Carneiro, P. L. S.; Conti, A. C. M.; Rezende, M. P. G. de
Publisher
CIPAV Foundation, Cali, Colombia
Citation
Livestock Research for Rural Development, 2019, 31, 2, pp Article 17
Abstract

Palicourea marcgravii is the most important toxic plant in Brazil due to its acute toxicity (sudden death), palatability, cumulative effect and broad geographical distribution. The study aimed to evaluate the resistance between cattle of different breeds by experimental intoxication of Palicourea ...

Author(s)
Serodio, J. J.; Castro, L. T. S.; Morais, T. L.; Cunha, R. D. da S.; Sant'Ana, F. J. F. de; Juliano, R. S.; Borges, J. R. J.; Fioravanti, M. C. S.; Cunha, P. H. J. da
Publisher
Elsevier Ltd, Oxford, UK
Citation
Toxicon, 2019, 168, pp 126-130
Abstract

Test-day milk, fat and protein yields and somatic cell score (SCS) of Brazilian Holstein cattle were used to study the effect of fixed (HTDF) vs random (HTDR) contemporary groups (herd-test-date) with or without unknown parent groups (UPG) using an autoregressive test-day animal model for genetic...

Author(s)
Silva, D. A. da; Costa, C. N.; Silva, A. A. da; Fonseca e Silva, F.; Lopes, P. S.; Santos, G. G. dos; Thompson, G.; Carvalheira, J.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2019, 220, pp 1-7
Abstract

Background: Genome-wide association studies (GWAS) are utilized in cattle to identify regions or genetic variants associated with phenotypes of interest, and thus, to identify design strategies that allow for the increase of the frequency of favorable alleles. Visual scores are important traits of ...

Author(s)
Carreño, L. O. D.; Pessoa, M. da C.; Espigolan, R.; Takada, L.; Bresolin, T.; Cavani, L.; Baldi, F.; Carvalheiro, R.; Albuquerque, L. G. de; Fonseca, R. da
Publisher
BioMed Central Ltd, London, UK
Citation
BMC Genomics, 2019, 20, 150, pp (20 February 2019)
Abstract

The objective of the present study was to identify genetic variation in heifer pregnancy due to heat stress in Nelore cattle during the breeding season. The Nelore heifers were born between 2003 and 2013 on six farms located in three Brazilian States. Heifer pregnancy (HP) was analyzed as a binary...

Author(s)
Santana Júnior, M. L.; Eler, J. P.; Oliveira Júnior, G. A.; Bignardi, A. B.; Pereira, R. J.; Ferraz, J. B. S.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2018, 218, pp 101-107
AbstractFull Text

The demand for beef cattle with specific traits is evident from sales in auctions. While purchasing, buyers consider individual traits (e.g., muscularity, frame, racial composition, and weight) as predictors of quality, and adjust their bids according to their preferences. The present study aimed...

Author(s)
Gonçalves, T. L.; Christofari, L. F.; Oaigen, R. P.; Bertodo, G. O.; Barcellos, J. O. J.; Bastos, G. de M.
Publisher
Centro de Ciências Rurais, Universidade Federal de Santa Maria, Santa Maria, Brazil
Citation
Ciência Rural, 2018, 48, 4, pp e20170283
AbstractFull Text

The intensification of beef cattle production systems, aiming to increase production rates, requires the use of technologies that favor the rational exploitation of livestock. Among the animal indicators, reproductive efficiency stands out because it is closely associated with the conditions of...

Author(s)
Sousa, R. T. de; Gonçalves, J. de L.; Santos, S. F. dos; Fernandes, A. M. F.; Ricci, G. dela
Publisher
Pubvet, Maringá, Brazil
Citation
PUBVET, 2018, 12, 5, pp RF2082

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