Holstein Breed
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Effect of STAT1, OLR1, CSN1S1, CSN1S2 , and DGAT1 genes on milk yield and composition traits of Holstein breed
ABSTRACT The objectives of the study were to evaluate allelic frequencies and test the association between STAT1, OLR1, CSN1S1, CSN1S2 , and DGAT1 gene polymorphisms and milk production traits including lactation milk yield, 305 days milk yield, days before peak milk production, and peak milk yield. In addition, samples of milk were analysed for fat, protein
R. Bras. Zootec.. Publicado em: 08/11/2018
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2. Quality assessment of the manufacture of new ripened soft cheese by Geotrichum candidum: physico-chemical and technological properties
Abstract A new type of ripened soft cheese by Geotrichum candidum was manufactured with pasteurized milk from Jersey and Holstein cow breeds. The physico-chemical (moisture, pH, acidity, protein, lipids and ash) and technological parameters (proteolysis, texture profile and color) during 21 days of ripening cheese (surface, center and whole), were evaluated
Food Sci. Technol. Publicado em: 16/04/2018
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3. Feeding behavior of crossbred steers fed diets containing babassu mesocarp meal and corn in kernels or ground
The objective of the present study was to evaluate the effect of the use of babassu mesocarp meal (BMM) and corn in different physical forms on the feeding behavior of crossbred young bulls of a dairy breed. Twenty-four crossbred (Nellore vs. Holstein) steers (307.35 kg) were fed four experimental diets containing two levels of inclusion of the babassu mesoc
R. Bras. Zootec.. Publicado em: 2014-05
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4. Association of recombinant bovine somatotropin (rBST) with equine chorionic gonadotropin (eCG) on antral follicle count and oocyte production in Holstein and Tabapuã heifers
The objective of this study was to investigate whether the use of rbST and eCG prior to ultrasound-guided follicular aspiration (OPU) improves oocyte yield and quality in Tabapuã and Holstein heifers. The study was conducted in two phases, 20 days apart, in a change-over design. The dominant follicle was ablated two days (D-2) before two treatments: stimula
R. Bras. Zootec.. Publicado em: 2012-12
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5. Sources of variation in milk urea nitrogen in Paraná dairy cows
The present study was conducted to determine the relationship between milk urea nitrogen (MUN) and milk yield, fat and protein contents, breed and season effects, parity and days in milk in dairy cows from Paraná State, Brazil. A total of 127,428 test-days from 16,013 dairy cows belonging to 96 herds enrolled in an official milk recording program were analy
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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6. Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows
The Cornel Net Carbohydrate and Protein System model version 5.0 was assessed as for its prediction of dry matter intake and milk production of grazing lactating Holstein × Zebu cows. Eight lactating cows grazing elephant grass (Pennisetum purpureum, Schum., cv. Napier) were used in two experiments of 30 days each. The experimental design was of randomized
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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7. Características da carcaça e da carne de novilhos de origem leiteira alimentados com dietas à base de palma forrageira. / Carcass and meat characteristics of dairy steers fed based on spineless cactus.
The objective of this issue was to evaluate the quantitative and qualitative characteristics of the carcass of dairy steers receiving diets based on spineless cactus and sorghum silage; the silage is associated by cottonseed meal, and the use of ultrasound to evaluate carcass of Holstein-Zebu young cattle destined for slaughter. The study was conducted at th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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8. Composition and fatty acid profile of milk from cows on pasture subjected to licuri oil supplement
The objective of this study was to determine the best level of oil licuri concentrate on dairy cows. The best level was determined through an analysis of the milk's chemical composition and fatty acid profile. Sixteen lactating cows from the Holstein × Zebu cross breed kept on Tanzania grass pastures were divided into four 4 × 4 Latin squares, which were f
Revista Brasileira de Zootecnia. Publicado em: 2011-12
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9. Estudo do polimorfismo genético da beta-lactoglobulina em bovinos Holando-Gir no Estado de Pernambuco.
The aim of the present work was to detect the genetic polymorphism of the β-Lactoglobulin (β-Lg) in different groups of Holstein-Gir breed cattle. There was collected 165 animals blood samples from the experimental farms of the Instituto Agronômico de Pernambuco (Itambé e Arcoverde) and from a private farm located in Zona da Mata Sul in the state
Publicado em: 2010
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10. Efeitos da administração de Butafosfan e Cianocobalamina após o parto, sobre parâmetros metabólicos e produtivos de vacas leiteiras / Effects of administration of Butafosfan and Cyanocobalamin postpartum on metabolic parameters and production of dairy cows
The aim of this study was to determine the effects of intramuscular injection of Butaphosphan and Cyanocobalamin on the parameters of energy metabolism, protein, enzyme, mineral and livestock of dairy cows in the postpartum period. We used 52 animals of the Holstein breed. The experimental period ranged from birth to 150 days of lactation. These cows were di
Publicado em: 2010
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11. Expression profile of genes associated with mastitis in dairy cattle
In order to characterize the expression of genes associated with immune response mechanisms to mastitis, we quantified the relative expression of the IL-2, IL-4, IL-6, IL-8, IL-10, IFN-γ and TNF-α genes in milk cells of healthy cows and cows with clinical mastitis. Total RNA was extracted from milk cells of six Black and White Holstein (BW) cows and six Gy
Genetics and Molecular Biology. Publicado em: 18/09/2009
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12. EFEITO DA LEPTOSPIROSE SOBRE A REPRODUÇÃO E A PRODUÇÃO EM REBANHOS LEITEIROS E ESTIMATIVA DA HERDABILIDADE / EFFECT OF LEPTOSPIROSIS ON REPRODUCTIVE AND PRODUCTIVE PERFORMANCE IN MILKING HERDS AND ESTIMATIVE OF HERITABILITY
The objectives of this study were to evaluate the effect of Leptospirosis on reproductive and productive performance for dairy breeds cows and to identify the inheritance of this disease by estimating the coefficient of heritability. There were used 1,788 test day milk records, measured in 115 Holstein, 16 Jersey and 18 crossbred cows, daughters of 51 bulls,
Publicado em: 2009