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FERTILIZATION CYTOLOGY OF CARASSIUS AURATUS PENGZESIS

ZHAO Zhen

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Abstract

The fertilization cytology of Carassius auratus pengzesis (♀) and Cyprinus Carpio L. red variety(♂) indicates that the population of C. auratus pengzesis do reproduce by gynogenesis. The heterologous sperm can normally enter the egg cytoplasm of C. auratus pengzesis. The sperm nucleus remains as a condensed mass and can not transform into male pronucleus,and no amphimixis was observed. No polar body was found in the ripe egg cells just after spawning. About 12 minutes after insemination(at water temperature of 26±1℃),only one polar body was extruded. The development of eggs could proceed with gynognetic way. The experiment of female C. auratus pengzesis crossed with male C. auratus pengzesis and C. carpio L. red variety shows that all the homologous sperm, heterologous sperm and inactive heterologous sperm can enter eggs and stimulate female pronucleus normal development into embryos. No deformed fry and hybridization features were found. The fry developed normally.

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What this paper is about

The fertilization cytology of Carassius auratus pengzesis (♀) and Cyprinus Carpio L. red variety(♂) indicates that the population of C. auratus pengzesis do reproduce by gynogenesis. The heterologous sperm can normally enter the egg cytoplasm of C. auratus pengzesis. The sperm nucleus remains as a condensed mass and can not transform into male pronucleus,and no amphimixis was observed. No polar body was found in the ripe egg cells just after spawning. About 12 minutes after insemination(at water temperature of 26±1℃),only one polar body was extruded. The development of eggs could proceed with gynognetic way. The experiment of female C. auratus pengzesis crossed with male C. auratus pengzesis and C. carpio L. red variety shows that all the homologous sperm, heterologous sperm and inactive heterologous sperm can enter eggs and stimulate female pronucleus normal development into embryos. No deformed fry and hybridization features were found. The fry developed normally.

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Available abstract

The fertilization cytology of Carassius auratus pengzesis (♀) and Cyprinus Carpio L. red variety(♂) indicates that the population of C. auratus pengzesis do reproduce by gynogenesis. The heterologous sperm can normally enter the egg cytoplasm of C. auratus pengzesis. The sperm nucleus remains as a condensed mass and can not transform into male pronucleus,and no amphimixis was observed. No polar body was found in the ripe egg cells just after spawning. About 12 minutes after insemination(at water temperature of 26±1℃),only one polar body was extruded. The development of eggs could proceed with gynognetic way. The experiment of female C. auratus pengzesis crossed with male C. auratus pengzesis and C. carpio L. red variety shows that all the homologous sperm, heterologous sperm and inactive heterologous sperm can enter eggs and stimulate female pronucleus normal development into embryos. No deformed fry and hybridization features were found. The fry developed normally.

Key concepts: Carassius auratus, Sperm, Biology, Pronucleus, Human fertilization, Cyprinus, Andrology, Zoology

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