文章摘要
刘国安,吴维新,林临安,徐大义,郑远刚.兴国红鲤同草鱼杂交的受精细胞学研究[J].水产学报,1987,11(1):17~21
兴国红鲤同草鱼杂交的受精细胞学研究
A CYTOLOGICAL STUDY ON THE CROSS FERTILIZATION OF RED COMMON CARP WITH GRASS CARP
  
DOI:
中文关键词: 兴国红鲤  草鱼  杂交  受精细胞学  单倍体  多倍体
英文关键词: Red carp (Cyprinus Carpio L.)  Grass carp (Ctenapharyngoden idellus Cur et al.)  Hybridization  Fertilization cytology  Monoploid  Polyploid
基金项目:
作者单位
刘国安 湖南省水产科学研究所 
吴维新 湖南省水产科学研究所 
林临安 湖南省水产科学研究所 
徐大义 湖南省水产科学研究所 
郑远刚 湖南省水产科学研究所 
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中文摘要:
      兴国红鲤与草鱼杂交虽属亚科间的远缘杂交,却符合鲤科鱼类一般的受精规律,精子由唯一的受精孔道进入卵内,单精入卵。受精的适当时间是在卵细胞第二次成熟分裂的中期。受精后7分钟形成精子星光。接着雄性原核、雌性原核先后形成,并逐渐靠拢;受精后40分钟两性原核结合(水温21℃);受精后45—50分钟出现新个体的第一次卵裂。说明草鱼精子对兴国红鲤成熟卵细胞不仅起激动作用,而且参与了遗传物质的组成。此系亚科间远缘杂交具有生活力的生物学基础。实验发现:在特定的条件下,同一批受精卵中,多倍体,单倍体,雌发育可能同时存在。本文还比较分析了常见的几种鲤科鱼类及其杂种受精的过程。
英文摘要:
      This paper deals with the cross fertilization between the female redcarp (Cyprinus carpio L.) and the male grase carp (Ctenapharyngoden idellus Cuv etVal). Even though the red carp and grass carp belong to differnet subfamilies, thefertilization agrees with the general law of cyprinidae fish. A single sperm enters theegg through the micropyle. The approperiate time of fertilization is at the metaphaseof the second meionis. Seven minutes after fertilization, the sperm-aster appears,thenthe male and female pronuclei form respectively and draw close gradually. Fourtyminutes after fertilization, the male and female pronuclei fuse to form the nuclearzygote (at the water temperature of 21℃). By the 45--50 minutes. the first cleavageoccurs. This indicates that the sperm of grass carp can not only activate the matured eggof the red carp but also attends the composition of herdity matter, which is biologicalbasis for the vitality of the hybrid. In the experiment, it is found that polyploid,monoploid and gynogensis may occur at the same time among the same group of thefertilized eggs under some specific conditions. Finally, a comparative study on thefertilizing process of some common carps as well as their hybridization is also made.
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