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

• Autores: David Salirrosas, Julio Leon, Monica Arqueros Avalos, Linda Sánchez Tuesta, Fernanda Rabanal, Zulita Prieto
• Localización: Scientia Agropecuaria, ISSN-e 2306-6741, ISSN 2077-9917, Vol. 8, Nº. 4, 2017 (Ejemplar dedicado a: Octubre - Diciembre), págs. 349-355
• Idioma: español
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• Resumen

  • 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.