Sperm quality of spontaneously occurring gynogenetic males in the yellowtail tetra Astyanax altiparanae

Author(s)

Lazaro, Talita Maria ^[1] ; Rocha, Nathalia Raissa de Alcantara ^[1] ; Monzani, Paulo Sergio ^[1] ; Nakaghi, Laura Satiko Okada ^[2] ; Senhorini, Jose Augusto ^[1] ; Yasui, George Shigueki ^[1] ; do Nascimento, Nivaldo Ferreira ^{[2, 1, 3]}

Affiliation

^[1] Chico Mendes Inst Biodivers Conservat, Natl Ctr Res & Conservat Continental Fish, Lab Fish Biotechnol, Pirassununga, SP - Brazil

^[2] Sao Paulo State Univ, Aquaculture Ctr, Jaboticabal, SP - Brazil

^[3] Univ Fed Rural Pernambuco UFRPE, Unidade Acad Serra Talhada, Ave Gregorio Ferraz Nogueira, S-N, BR-56909535 Serra Talhada, PE - Brazil

• Document type: Journal article
• Source: Journal of Applied Ichthyology; v. 37, n. 6 JUL 2021.
• Web of Science Citations: 0

Abstract

Gynogenesis is a chromosomal manipulation technique where an offspring is generated exclusively from maternal inheritance. In the yellowtail tetra (Astyanax altiparanae) almost all gynogenetic fish were females, suggesting a genetic sex determination system of XX/XY. However, due to environmental (e.g. temperature) or unknown genetic factors, the rise of males are described. Therefore, the aim of this study was to analyze the reproductive parameters of spontaneously gynogenetic males. The parameters analyzed were spermatozoon viability, motility and ploidy. Additionally, the gonads were processed for histology and the genetic inheritance confirmed by genotyping. Sperm parameters of gynogenetic males did not show differences when compared with semen of normal males. These data supports that gynogenetic males presents fertilization capacity and can be used for future studies of chromosome manipulation or possible production of monosex populations in A. altiparanae. (AU)

• FAPESP's process: 11/11664-1 - Chimerism in native fish species as a tool for surrogate propagation in aquaculture
• Grantee: George Shigueki Yasui
• Support Opportunities: Scholarships in Brazil - Young Researchers
• FAPESP's process: 16/16386-3 - Molecular techniques for validation of reproductive biotechnologies in fish used for preservation of endangered species
• Grantee: Paulo Sérgio Monzani
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/12383-0 - Chromosome set manipulation techniques on lambari (Astyanax altiparanae)
• Grantee: Nivaldo Ferreira do Nascimento
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/17429-1 - Chimerism in native fish species as a tool for surrogate propagation in aquaculture
• Grantee: George Shigueki Yasui
• Support Opportunities: Research Grants - Young Investigators Grants