Animal Crossbreeding
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. Estudo genÃtico-quantitativo com os grupos genÃticos formadores da raÃa Girolanda / Genetic-quantitative study with the genetic groups formadores of the Girolanda race
A partir de dados de genealogia, produÃÃo de leite e registro de partos de animais de vÃrios grupos genÃticos HolandÃs x Gir, obtidos junto à AssociaÃÃo Brasileira dos Criadores de Girolando, foram realizados trÃs estudos. No primeiro estudo foram investigados os efeitos do tratamento das informaÃÃes de duraÃÃo da lactaÃÃo sobre variabilidade
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2005
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14. Caracterização da freqüência de heterozigose em genes ligados à precocidade sexual em novilhas de corte compostas / Heterozigosity frequency characterization in genes related to sexual precocity in composite beef heifers
The luteinizing hormone receptor (LHR) and follicle-stimulating receptor (FSHR) genes, known for their influence on the onset of puberty were evaluated by PCR-RFLP analysis in a population of 370 European-Zebu composite beef heifers from different breed contributions. The objectives were to genetically characterize the investigated population using genotype
Publicado em: 2005
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15. Exigências e eficiência energética de vacas de corte Nelore e de cruzamento Bos Taurus x Nelore. / Energy requirements and energetic efficiency of nellore and crossbred bos taurus x nellore beef cows.
Forty mature, lactating and non-pregnant cows (10 Nellore NL; 10 Canchim x Nellore CN; 10 Angus x Nellore AN; and 10 Simmental x Nellore SN) were randomized in blocks by calving date. Calves out of crossbred cows were sired by Canchim bulls, while calves out of NL cows were sired by Nellore bulls. Cows were individually fed from postpartum to wea
Publicado em: 2004
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16. MEAT PRODUCTION WITH POLWARTH AND POLWARTH X BORDER LEICESTER CROSSBRED LAMBS ON SUPPLEMENTED NATURAL PASTURE AND CULTIVED PASTURE WITH OR WITHOUT SUPPLEMENTATION / PRODUÇÃO DE CARNE DE CORDEIROS DA RAÇA IDEAL E CRUZAS IDEAL X BORDER LEICESTER TERMINADOS EM CAMPO NATURAL SUPLEMENTADO E PASTAGEM CULTIVADA COM OU SEM SUPLEMENTAÇÃO
The objectives of this work were to verify the feeding systems and genotype effect on Polwarth and Polwarth x Border Leicester crossbred lambs performance and carcass characteristics. The experiment was carried out in two times: on the first, before slaughter, were estimated the pasture and animal characteristics; and the second, after slaughter, were estima
Publicado em: 2004
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17. Milk and plasma urea nitrogen on crossbreed cows / Teores de nitrogênio uréico no leite e plasma de vacas mestiças
The objective of this study was to validate the use of results of commercial enzymatic kits (KITS UREA CE), also to milk. Samples (n = 35) were collected and each one was divided into five aliquots. Two of which were sent to reference laboratories (LRs) and the others were analysed by means of KITS UREA CE. Before the analysis, however, each of these was sub
Publicado em: 2003
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18. Association between genetic polymorphisms and growth curve parameters in beef cattle. / Associação entre polimorfismos genéticos e parâmetros da curva de crescimento em bovinos de corte.
Data from a crossbreeding experiment, carried out at Embrapa Southeast Cattle Research Center, State of São Paulo, Brazil, were analyzed in order to evaluate the effects of kappa-casein-HinfI (CSN3): AA and AB, growth hormone-AluI (GH): LL and LV, and b-lactoglobulin-HaeIII (LGB): AA, AB and BB, polymorphism on the growth curve of three beef cattle crosses,
Publicado em: 2002
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19. Damage and biology of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: noctuidae) on maize genotypes. / Danos e biologia de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) em genótipos de milho.
Plant resistance is a usefui component of integrated pest management and its value has been increasing in plant breeding programs, ln this study, 12 maize genotypes were evaluated to damage of fali armyworm Spodoptera frugíperda (J.E. Smith, 1797) in field conditions. The effect of these genotypes on fali armyworm biology was evaluated in laboratory conditi
Publicado em: 2002
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20. Blood pressure reduction and diabetes insipidus in transgenic rats deficient in brain angiotensinogen
Angiotensin produced systemically or locally in tissues such as the brain plays an important role in the regulation of blood pressure and in the development of hypertension. We have established transgenic rats [TGR(ASrAOGEN)] expressing an antisense RNA against angiotensinogen mRNA specifically in the brain. In these animals, the brain angiotensinogen level
The National Academy of Sciences.