彭泽鲫的受精细胞学

FERTILIZATION CYTOLOGY OF CARASSIUS AURATUS PENGZESIS

对彭泽鲫（♀）与兴国红鲤（♂）受精细胞学所作研究表明，彭泽鲫属雌核发育种群。异源精子能正常进入彭泽鲫卵子内，受精卵中异源精子呈凝缩状态，不形成雄性原核，没有看到两性原核融合。在刚产出的成熟卵子中没有看到极体，受培后12min（水温26±1℃）见到唯一的一个极体排出，雌性原核自行发育。雌性彭泽鲫几种交配组合繁植实验表明，同源精子、异源精子、灭活异源精子均能人卵刺激卵核正常胚胎发育，未见畸形苗和杂种性状，仔鱼生长发育正常。

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.