Zebu Bulls
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Blood parameters of Angus and Nellore young bulls fed diets with or without forage.
ABSTRACT We evaluated blood parameters of Angus and Nellore bulls fed diets with and without forage. Forty animals with initial body weight (BW) of 380±16.2 kg were housed in individual stalls. Eight bulls of each breed were fed a whole shelled corn (WSC) diet [850 g kg−1 of WCS and 150 g kg−1 of a pellet based on soybean meal, dry mater (DM) basis] or
R. Bras. Zootec.. Publicado em: 07/10/2019
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2. Estimation of genetic parameters for weight traits and Kleiber Index in a Brahman cattle population
ABSTRACT: Interest in improving feed efficiency of cattle has been increasing. The residual feed intake (RFI), the most commonly used measurement of feed efficiency, is expensive and can only be used in a small number of animals. The Kleiber Index has also been proposed to measure RFI. In this study, we estimated genetic parameters for the Kleiber Index aver
Sci. agric. (Piracicaba, Braz.). Publicado em: 30/05/2019
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3. Testicular Histomorphometric Evaluation of Zebu Bull Breeds
The objective of this study was to evaluate the quantitative histology and testicular biometrics in zebu bulls of different breeds. Testicular fragments of Nelore (n=10), Polled Nelore (n=6), Gir (n=5), Guzerat (n=5) and Tabapuã bulls (n=5) were used. The fragments were perfusion-fixed in Karnovsky solution, embedded in glycol methacrylate and stained with
Braz. arch. biol. technol.. Publicado em: 2014-12
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4. Desempenho produtivo, exigências nutricionais e avaliação de métodos para estimação de fluxo de digesta em bovinos alimentados com silagem de milho ou cana-de-açúcar / Animal performance, nutrient requeriments and methods to estimate digesta flow in bulls feed with corn silage or sugar cane
Este trabalho foi desenvolvido a partir de quatro experimentos com os objetivos de avaliar o consumo de matéria seca e dos constituintes da dieta, a digestibilidade, o desempenho e as características de carcaça; estimar as exigências nutricionais de proteína e energia; avaliar a composição química, o perfil e a quantificação de ácidos graxos no m�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
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5. Leptin and insulin in the seminal plasma of zebu bulls in peripuberty
In order to determine the profile of leptin and insulin values in seminal plasma and their correlations with sperm patterns during the peripuberty, a total of 16 crossbred Gyr dairy bulls were monitored from 60 days before to 60 days after puberty, separated into two groups, early and regular, according to the onset of puberty. Hormone values were determined
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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6. Performance and nutritional evaluation of beef cattle raised on pasture, castrated at different ages, with and without supplementation
The objective of this study was to evaluate performance and nutritional traits of beef cattle raised on pastures, castrated at different ages, with and without supplementation. Forty-four crossbred young bulls with predominance of Zebu breed at initial average age of 120±30 days were used in the experiment. Animals were distributed in a completely randomize
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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7. Efeito das variáveis climáticas nas características do sêmen, testosterona e cortisol em bovinos / Influence of year season on semen characteristics and hormones in Nelore an Simental bulls
O objetivo desse trabalho foi estudar a influência das quatro estações do ano: (primavera, verão, outono e inverno), nas características do sêmen e nos níveis de testosterona e cortisol em touros Nelore e Simental. Cinco touros Nelore e cinco Simental com 48-72 meses de idade, criados extensivamente, foram avaliados andrologicamente por meio de exame
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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8. Perdas na ensilagem e desempenho de bovinos de corte suplementados com dietas contendo silagem de capim-marandu em duas idades de rebrotação tratadas com inoculante bacteriano / Silage losses and performance of beef cattle fed diets with Marandu grass silages at two ages of regrowth treated with bacterial inoculant
Three experiments were carried out to evaluate intake and the partial and total nutrient apparent digestibilities, nitrogen compounds balance, microbial efficiency, rumen traits and the performance of beef cattle fed diets based on Brachiaria brizantha cv Marandu at two ages of regrowth with and without microbial inoculant Sil ALL C4 (Alltech Brazil), as wel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2011
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9. Production indices for dual purpose cattle in central Brazil
This study examined the effects of crossbreeding low genetic potential cows of Bos indicus origin characterized by Gyr crossed with Holstein-Friesian and Simmental bulls to produce animals in a low input dual purpose system. The farm is situated near Brasilia, in the savannah region of Brazil. The climate of the region is classified as Aw by Köppen. Data wa
Revista Brasileira de Zootecnia. Publicado em: 2011-07
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10. Association of bGH and Pit-1 gene variants with milk production traits in dairy Gyr bulls.
The objective of this study was to obtain genetic marker information in the Gyr breed by analyzing bGH and Pit-1 gene polymorphisms and to verify their association with milk production traits. One sample including 40 Gyr bulls were genotyped at two bGH gene restriction sites (bGH- AluI and bGH-MspI) and at one restriction site in the Pit-1 gene (Pit-1 HinfI)
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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11. Desempenho de bezerros filhos de touros das raças Nelore e Canchim e cruzados (F1) Charolês x Nelore e Piemontês x Nelore.
O objetivo deste trabalho foi comparar os pesos ao nascimento (PN) e a desmama (PD) e o ganho de peso do nascimento a desmama, de bezerros filhos de vacas da raça Nelore com touros da raça Nelore e 5/8 Charolês + 3/8 Zebu (Canchim).
Revista Brasileira de Zootecnia. Publicado em: 2011
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12. Identification of genomic regions associated with backfat thickness in synthetic cattle.
Canchim is a synthetic beef cattle developed in Brazil which have good growth potential and tropical adaptation but suboptimal fat deposition. There are genomic regions associated with fat deposition already described, among them the centromeric region of BTA14. The scope of this work was to identify genomic regions associated with backfat thickness in Canch
INTERNATIONAL CONFERENCE ON ANIMAL GENETICS. Publicado em: 2011