| Journal: | Brazilian archives of biology and technology |
| Database: | PERIÓDICA |
| System number: | 000392583 |
| ISSN: | 1516-8913 |
| Authors: | Andreussi, Paulo Antônio Terrabuio1 Costa, Deiler Sampaio1 Faria, Fabio Jose Carvalho1 Fernandes, Carlos Antônio Carvalho2 Santos, Marcelo Diniz3 Silva, Juliana Correa Borges4 |
| Institutions: | 1Universidade Federal de Mato Grosso do Sul, Faculdade de Medicina Veterinaria e Zootecnia, Campo Grande, Mato Grosso do Sul. Brasil 2Biotran, Alfenas, Minas Gerais. Brasil 3Universidade de Cuiaba, Cuiaba, Mato Grosso. Brasil 4Empresa Brasileira de Pesquisa Agropecuaria, Pantanal, Corumba, Mato Grosso do Sul. Brasil |
| Year: | 2014 |
| Season: | Nov-Dic |
| Volumen: | 57 |
| Number: | 6 |
| Pages: | 900-907 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | 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 toluidine blue-1% sodium borate. The Nelore animals had a higher tubular volumetric proportion (85.2%) and greater height of the seminiferous epithelium (73.2 µm) than the Gir, Guzerat and Tabapuã breeds. The Nelore animals also had a higher volumetric proportion of Leydig cells (5.2%) than the Guzerat and Tabapuã breeds. There was no significant difference for any of these parameters between the Nelore and Polled Nelore breeds. The gonadosomatic index, seminiferous tubule diameter, cross-sectional area of the seminiferous tubule and tubule length (total length and length per gram of testicular parenchyma) did not vary among the breeds studied. The morphometric parameters evaluated suggested that the genetic selection applied to the Nelore and Polled Nelore breeds improved the efficiency of spermatogenesis in these breeders |
| Disciplines: | Medicina veterinaria y zootecnia, Biología |
| Keyword: | Bovinos, Medicina veterinaria, Reproducción y genética animal, Anatomía e histología, Testículos, Proporción sexual, Túbulos seminíferos |
| Keyword: | Veterinary medicine and animal husbandry, Biology, Animal reproduction and genetics, Bovines, Veterinary medicine, Anatomy and histology, Cattle, Testis, Sex ratio, Seminiferous tubules |
| Full text: | Texto completo (Ver PDF) |
