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| Registros recuperados: 14 | |
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| SILVA, A. M. da; ALENCAR, M. M. de; FREITAS, A. R. de; BARBOSA, R. T.; BARBOSA, P. F.; OLIVEIRA, M. C. de S.; CORRÊA, L. de A.; NOVAES, A. P. de; TULLIO, R. R.. |
| O objetivo deste trabalho foi estimar as herdabilidades e as correlações genéticas do peso (PI2) e dó perímetro escrotal\{PEI2) aos 12 meses de idade de machos e dos pesos ao primeiro (PPP) e segundo (PSP) partos, ídades ao primeiro (IPP) e segundo (ISP) partos, peso adulto (PAO) e parâmetros A (peso assintótico) e k (taxa de maturação) da curva de Von Bertalanffy de fêmeas, na raça Canchim. Utilizou-se o método da máxima verossimilhança restrita com modelo que incluiu os efeitos fixos de grupo de contemporâneos e efeitos aleatórios de animal. As estimativas de herdabilidade foram iguais a: 0,37 (PI2); 0,30 (PEI2); 0,38 (A); 0,35 (k); 0,12 (IPP); 0,33 (PPP); 0,04 (ISP); 0,39 (PSP); e 0;38 (P AO). As correlações genéticas de P 12 com as características das... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Gado de corte; Características reprodutivas; Fêmeas; Machos; Peso adulto; Seleção; Beef cattle; Reproduction caracteristics; Cow; Bull; Weight. |
| Ano: 2000 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/45529 |
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| Akosman,Murat Sirri; Lenger,Ömer Faruk; Demirel,Hasan Hüseyin. |
| The testicular measurement is important criteria for experimental researches especially in toxicological studies and the prediction of spermatogenesis. In light of this knowledge, we aimed to estimate and compare these parameters in two different kinds of cattle breeds. The gross anatomical measurements were performed by vernier caliper, volume of the testis was estimated by Cavalieri method and seminiferous tubule diameter was measured on the histological sections by software-loaded computer attached to microscope. The mean testis weight, length, width, volume, and tubule diameter of the Simmental bulls and the Holstein bulls measured as 316 g, 12.1 cm, 6.9 cm, 295 cm3 and 226.68 µm and 299 g, 12.1 cm, 6.8 cm, 285 cm3 and 223.44 µm, respectively. In... |
| Tipo: Journal article |
Palavras-chave: Bull; Cavalieri method; Seminiferous tubule; Testis; Volume. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300048 |
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| Unanian,Maria Marina; Barreto,Cristine Chaves; Cordeiro,Célia Maria Torres; Freitas,Alfredo Ribeiro; Josahkian,Luiz Antonio. |
| The polymorphism of the bovine growth hormone gene (bGH) was studied in 211 Nellore pure breed males for association with reproductive traits. Scrotal circumference and testosterone concentrations were collected monthly from 10 until 16 months of age. Additionally, testicular growth rates were calculated. DNA was amplified by PCR and digested using Msp I and Hae III restriction enzymes. Every polymorphism presented two alleles. The predominant alleles were D (0.85) and F (0.98), respectively, and genotype EE - bGH/Hae III was missing. Significant association (P<0.05) between bGH/Msp I polymorphism, scrotal circumference and testicular growth after puberty, as well as between bGH/Hae III and testosterone concentrations at puberty were detected. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bull; Growth hormone gene polymorphism; Testosterone concentrations. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300007 |
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| Gomes,V.S.; Mano,S.B.; Freitas,M.Q.; Santos,M.D.; Azeredo,V.B.; Silva,J.M.; Santos,E.B.; Conte-Júnior,C.A.. |
| ABSTRACT The aim of this study was to evaluate the effect of diets containing whole cottonseed (WC) on blood biochemical parameters of bulls. Thirty bulls with 30±6 months and 382.7±28.4kg were kept in feedlot (85 days) and fed the following WC levels: 0, 2.22, 4.44, 6.66, 8.88 and 11.11%. In comparing biochemical indicators from the beginning to the end of the experiment, the control group (CG) and those fed diets containing 2.22, 8.88 and 11.11% of WC had an increase (P<0.05) in serum Ca concentrations (8.34±0.65−9.56±0.92mEqL-1). In relation to Fe (202.79±69.04−300.04±79.88µg/dL), the CG and those treated with 6.66% WC showed an increase (P<0.05) in serum concentrations. As to the Mg (1.92±0.18−2.40±0.27mEqL-1), groups treated with diet containing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bull; Serum biochemical; Whole cottonseed; Gossypol. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000300551 |
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| SILVA, J. C. B. da; POTIENS, J. R.; SILVA, M. R.; NOGUEIRA, E.; OLIVEIRA, L. O. F. de; ABREU, U. G. P. de; RODRIGUES, W.; COSTA, D. S.. |
| A comercialização de sêmen congelado requer padrões de qualidade que, embora não sejam definidos pelo MAPA, seguem critérios CBRA (2013). Sabe-se que muitos touros têm este padrão e, portanto, são comercializados legalmente, podendo não ter uma taxa de prenhez satisfatória. Por outro lado, também há casos de touros que não cumprem as recomendações (especialmente as patologias espermáticas), e ainda apresentam uma taxa de prenhez satisfatória. Este relato de caso mostrou desempenho aceitável de um touro Nelore com patologias espermáticas de porcentagem elevada, discordando dos critérios atuais. O tema é relevante e muito importante, considerando a alta demanda comercial de touros geneticamente superiores, com características de importância econômica, para a... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Sêmen congelado; Touro; Qualidade espermática; Cryopreservation; Bull; Quality sperm; Fisiologia Reprodutiva; Reprodução animal; Animal reproduction. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1077027 |
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| Bertol,Melina Andrea Formighieri; Weiss,Romildo Romualdo; Thomaz-Soccol,Vanete; Kozicki,Luiz Ernandes; Fujita,Aline Silva; Abreu,Renata Azevedo de; Green,Kerriel Thandile. |
| The aim of this study was to evaluate the viability of bull spermatozoa collected from the cauda epididymis stored at 18-20°C, which were compared with semen collected by electro-ejaculation method and preserved at 5°C. Ten pairs of testes from Tabapuã bulls were removed by orchiectomy and stored for 6 (G6), 12 (G12), 18 (G18), 24 (G24) and 30 (G30) h at room temperature (18-20°C). Seven days before orchiectomy, semen was collected by electro-ejaculation method. The sperm parameters evaluated were: sperm motility, vigor, concentration, morphology and acrosome defects. Sperm motility declined (p<0.05) when spermatozoa were stored for 30 h in the epididymis. The spermatozoa from the epididymis showed lower sperm motility than that of spermatozoa collected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bull; Epididymis; Orchiectomy; Sperm; Room temperature; Viability. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500008 |
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| Registros recuperados: 14 | |
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