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Genetic analysis on accumulated productivity and calving intervals in Nelore cattle
(Tropical Animal Health And Production, 2015) [Artigo]
The aim of this study was to estimate genetic parameters for accumulated productivity (ACP), first calving interval (CI1), second calving interval (CI2), and mean calving interval (MCI) in Nelore beef cattle. The ACP trait ...
Indicadores de desempenho em rebanho da raça Holandesa: curvas de crescimento e altura, características reprodutivas, produtivas e parâmetros genéticos
(Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2004-02-01) [Artigo]
Foram analisados dados de peso, altura e desempenho produtivo e reprodutivo de 1.272 novilhas da raça Holandesa, nascidas no período de 1990 a 1998. Estudaram-se o desenvolvimento em peso e altura do nascimento até o ...
Milk fatty acid characterization and genetic parameter estimates for milk conjugated linoleic acid in buffaloes
(Journal of Dairy Research, 2011-05-01) [Artigo]
The objectives of this study were to analyse buffalo milk fat composition, to verify the activity of Delta (9)-desaturase enzyme in the mammary gland, as well as to estimate additive genetic variances for milk, fat and ...
Test-day milk yield as a selection criterion for dairy buffaloes (Bubalus bubalis Artiodactyla, Bovidae)
(Genetics and Molecular Biology, 2008-01-01) [Artigo]
Due to the great demand for buffalo milk by-products the interest in technical-scientific information about this species is increasing. Our objective was to propose selection criteria for milk yield in buffaloes based on ...
Genetic parameters for test-day yield of milk, fat and protein in buffaloes estimated by random regression models
(Journal of Dairy Research, 2012-08-01) [Artigo]
The test-day yields of milk, fat and protein were analysed from 1433 first lactations of buffaloes of the Murrah breed, daughters of 113 sires from 12 herds in the state of São Paulo, Brazil, born between 1985 and 2007. ...
Genome-wide association between single nucleotide polymorphisms with beef fatty acid profile in Nellore cattle using the single step procedure
(Bmc Genomics, 2016-03-09) [Artigo]
Background: Saturated fatty acids can be detrimental to human health and have received considerable attention in recent years. Several studies using taurine breeds showed the existence of genetic variability and thus the ...
Genetic parameters for an alternative criterion to improve productive longevity of Nellore cows
(Journal of Animal Science, 2012-12-01) [Artigo]
Number of calvings at 53 mo (NC53) was proposed as an alternative selection criterion to improve productive longevity of Nellore cows. This study was carried out to estimate variance components for NC53 by assuming different ...
Estimation of genetic parameters for body weights, scrotal circumference, and testicular volume measured at different ages in Nellore cattle
(Journal of Animal Science, 2010-04-01) [Resumo]
Data from 129,575 Nellore cattle born between 1993 and 2006, belonging to the Jacarezinho cattle-raising farm, were used to estimate genetic parameters for scrotal circumference measured at 9 (SC9), 12 (SC12), and 18 (SC18) ...
Efeito da linhagem citoplasmática sobre o peso ao nascer e o ganho médio diário na pré-desmama em bovinos da raça Caracu
(Revista Brasileira de Zootecnia, 2001-02-01) [Artigo]
O objetivo do presente estudo foi avaliar o efeito da linhagem citoplasmática sobre as características peso ao nascer (PN) e ganho médio diário pré-desmama (GMD) de, respectivamente, 4.212 e 3844 registros de bezerros de ...
Effect of lactation length adjustment procedures on genetic parameter estimates for buffalo milk yield
(Genetics and Molecular Biology, 2011-01-01) [Artigo]
The objectives of this study were to estimate the genetic parameters for milk yield unadjusted and adjusted for days in milk and, subsequently, to assess the influence of adjusting for days in milk on sire rank. Complete ...