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滁州鲫雌核发育的细胞学研究
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摘要:
研究产于安徽省滁州市城西水库的滁州鲫是否行雌核发育繁殖。对滁州鲫♀×滁州鲫♂及滁州鲫♀×红鲤♂受精卵进行细胞学研究,结果表明:(1)在刚产出的成熟卵细胞内没有发现极体,在精子入卵约15~16min后(水温为18~20℃),单个极体被排出;(2)在受精卵内,精核保持凝聚状态,没有形成雄性原核;(3)精子入卵20 min后,卵核形成雌性原核,在第一次卵裂前没有观察到雌性原核与呈凝聚状态的精核的融合;(4)同源与异源精子激发滁州鲫卵的发育过程基本相同,异源精子能进入滁州鲫卵细胞并激发卵核形成雌性原核,并进行正常胚胎发育,其鱼苗正常,无畸形和无杂交性状的鱼苗。研究表明,滁州鲫为雌核发育鱼类。
关键词:  滁州鲫  红鲤  雌核发育  细胞学  
DOI:
基金项目:
A cytological study on gynogenesis of Chuzhou Crucian carp(Carassius auratus)
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Abstract:
The purpose of our investigation was to examine whether the Chuzhou Crucian carp caught from City-west reservoir in Chuzhou City,Anhui Province,would reproduce by gynogenesis.Their spawns were artificially inseminated with milt of Crucian carp and Red carp(Cyprinus carpio L.red variety),and a number of fertilized eggs were studied cytologically before their first cleavages.The results of observation are as follows:(1) No polar body was found in the ripe egg cells just after spawning.About 15 minutes after i...
Key words:  Chuzhou Crucian carp(Carassius auratus)  Red carp(Cyprinus carpio L.red variety)  gynogenesis  cytology  

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