Abstract

SALIRROSAS, David et al. YY super males have better spermatic quality than XY males in red tilapia Oreochromis niloticus. Scientia Agropecuaria [online]. 2017, vol.8, n.4, pp.349-355. ISSN 2077-9917.  http://dx.doi.org/10.17268/sci.agropecu.2017.04.06.

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.

Keywords : Oreochromis niloticus; tilapia; spermatic quality; YY males.

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