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Somatotrophic and thyroid hormones around the onset of lay in broiler breeders under different conditions
(Acta Veterinaria Hungarica, 2002-01-01) [Artigo]
Somatotrophic and thyroid hormones were determined around the onset of reproduction in broiler breeders reared in two different housing systems [dark, close-sided house (CH) and conventional, open-sided house (OH)]. In ...
Accounting for population structure in selective cow genotyping strategies
(Journal Of Animal Breeding And Genetics, 2019-01-01) [Artigo]
The objective of the present study was to investigate the impact of considering population structure in cow genotyping strategies over the accuracy and bias of genomic predictions. A small dairy cattle population was ...
Performance, beef quality and expression of lipogenic genes in young bulls fed low-fat dried distillers grains
(Meat Science, 2020-02-01) [Artigo]
Two studies were carried out, the first with the objective to evaluate performance, beef quality and expression of genes involved in lipid metabolism in the muscle of bulls fed with or without low-fat dried distillers ...
Estimates of direct and maternal genetic effects for weights from birth to 600 days of age in Nelore cattle
(Journal of Animal Breeding and Genetics, 2001-12-01) [Artigo]
Estimates of direct and maternal variance and heritability for weights at each week (up to 280 days of age) and month of age (up to 600 days of age) in Zebu cattle are presented. More than one million records on 200 000 ...
Genetic parameter estimates for gastrointestinal nematode parasite resistance and maternal efficiency indicator traits in Santa Ines breed
(Journal Of Animal Breeding And Genetics, 2019-07-31) [Artigo]
Infection with Haemonchus contortus is the most economically important gastrointestinal nematode parasitosis and the most important cause of mortality in sheep production. The aim of this study was to estimate variance ...
Utilização de Trigo em ou Moído em Dietas Para Frangos de Corte
(Revista Brasileira de Ciência Avícola, 2001-05-01) [Artigo]
Foi conduzido um experimento com o objetivo de avaliar os efeitos da utilização de trigo em grão ou moído sobre o desempenho e as características de carcaça de frangos de corte nos períodos de 21 a 42 e 21 a 49 dias de ...
Genetic Parameter Estimates for Milk Yield and Lactation Length in Buffalo
(Buffalo Bulletin, 2013-01-01) [Artigo]
The objective of this study was to estimate genetic parameters for milk yield at 244 days and lactation length in graded buffalo cows at the El Cangre Cattle Genetic Enterprise. Data were gathered from 2575 lactations, ...
Genetic associations between carcass traits measured by real-time ultrasound and scrotal circumference and growth traits in Nelore cattle
(Journal of Animal Science, 2010-01-01) [Artigo]
The aim of the present study was to evaluate the genetic correlations among real-time ultrasound carcass, BW, and scrotal circumference (SC) traits in Nelore cattle. Carcass traits, measured by real-time ultrasound of the ...
Variances of direct genetic effects, maternal genetic effects, and cytoplasmic inheritance effects for milk yield, fat yield, and fat percentage
(Journal of Dairy Science, 1998-02-01) [Artigo]
Milk yield, fat yield, and fat percentage during the first three lactations were studied using New York Holsteins that were milked twice daily over a 305-d, mature equivalent lactation. Those data were used to estimate ...
Genetic associations of sexual precocity with growth traits and visual scores of conformation, finishing, and muscling in Nelore cattle
(Journal of Animal Science, 2009-05-01) [Artigo]
The objective of this study was to determine the possible use of heifer pregnancy at 16 mo as a selection criterion and its possible genetic associations with hip height, yearling weight, and visual scores of conformation, ...