Testicular Histomorphometric Evaluation of Zebu Bull Breeds
AUTOR(ES)
Andreussi, Paulo Antônio Terrabuio, Costa, Deiler Sampaio, Faria, Fábio José Carvalho, Fernandes, Carlos Antônio Carvalho, Santos, Marcelo Diniz, Silva, Juliana Correa Borges
FONTE
Braz. arch. biol. technol.
DATA DE PUBLICAÇÃO
2014-12
RESUMO
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.
Documentos Relacionados
- Signatures of Selection From Candidate Gene Polymorphisms Panel in Five Zebu Breeds
- Genetic evaluation of milking buffaloes (Bubalus bubalis): bull ranking
- Effectiveness of the morphofunctional evaluation method of Campolina and Mangalarga Marchador breeds
- Histomorphometric evaluation of strontium-containing nanostructured hydroxyapatite as bone substitute in sheep
- Physico-chemical and Histomorphometric Evaluation of Zinc-containing Hydroxyapatite in Rabbits Calvaria