Scientia Agropecuaria (Dec 2017)

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

  • David Salirrosas,
  • Julio Leon,
  • Monica Arqueros-Avalos,
  • Linda Sanchez-Tuesta,
  • Fernanda Rabanal,
  • Zulita Prieto

Journal volume & issue
Vol. 8, no. 4

Abstract

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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.

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