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ACOMPARATⅣE STUDY 0N THE SILVER-STAINED KAROYOTYPES OF EIGHT SPECIES RATS (RATTUS )IN CHINA

SHll Liming, HE Yuanhui   

  • Online:2006-08-09 Published:2007-07-20

八种大鼠染色体银染核仁组织者的比较研究

陈志平, 王应祥, 刘瑞清, 施立明, 何远辉   

  1. 中国科学院昆明动物研究所,昆明

Abstract: Silver-stained karyotypes of 8Rattus species,namely R. flavipectus , R. rattus sladeni,R. sikkimensis,R. nitidus,R. 1osea,R. turkeatanicus and R. norvegtcus were studied.And there are some differences in the features of the NORs among 8 species.Moreover,the polymorphisms anti association of Ag-NORs have been observed.
The relative size of NORs between the homologoues chromosome(No.13)of R.losea is apparently different.Based on the different characteristics of silver-stained karyotype. the classification of genus Rattus in China has been discussed,and a cluster dendrogram has been presented in this paper by the fuzzy aggregation.

Key words: Rat (Rattua)l Silver-stained karyotypes Polymorphisms, Fuzzy aggregation

摘要: 本文对我国大鼠属(Rattus)8种鼠类的银染核仁组织者(NORs)进行了比较研究,结果表明:8种大鼠银染核仁组织者(Ag-NORs)的数且和分布均存在一定的差异,它们的NORs都呈现比较显著的多态性,并观察到了Ag-NORs的联台现象和异形现象。此外,将其银染核型差异数量化,通过模糊聚类分析,得到8种大鼠的聚类分析分支图,井结台它们的地理分布等对其分类地位进行了讨论。

关键词: 大鼠, 银染核型, 多态, 模糊聚类