YY super males have better spermatic quality than XY males in red tilapia Oreochromis niloticus

• Autores: Salirrosas, David, Leon, Julio, Arqueros-Avalos, Monica, Sanchez-Tuesta, Linda, Rabanal, Fernanda, Prieto, Zulita
• Formato: artículo
• Fecha de Publicación: 2017
• Institución: Universidad Nacional de Trujillo
• Repositorio: Revista UNITRU - Scientia Agropecuaria
• Lenguaje: inglés
• OAI Identifier: oai:ojs.revistas.unitru.edu.pe:article/1638
• Enlace del recurso: http://revistas.unitru.edu.pe/index.php/scientiaagrop/article/view/1638
• Nivel de acceso: acceso abierto
• Materia: Oreochromis niloticus; tilapia; spermatic quality; YY males.

The influence of sex-related chromosomal arrangement in an YY and XY population of Oreochromis niloticus males was investigated in this study. A better spermatic mobility, motility, viability, confluence and less abnormality were found in double Y-chromosome males (YY-males), compared to XY-males; however, this better spermatic quality did not correlate with the body weight of individuals which was significantly better in XY-males. This study establishes the influence of YY-related sequences over spermatic quality and indicates the usefulness of the YY technology as a strategy to obtain better fish breeders and genetically male individuals for a tilapia farming program.