Resumen de YY super males have better spermatic quality than XY males in red tilapia Oreochromis niloticus
David Salirrosas, Julio Leon, Monica Arqueros Avalos, Linda Sánchez Tuesta, Fernanda Rabanal, Zulita Prieto
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.
