仓鼠属三个种的核型分析

仓鼠属三个种的核型分析

徐肇华, 黄文几

复旦大学生物系

出版日期:2011-11-22 发布日期:2011-11-22

ON THE KARYOTYPES OF THREE SPECIES OF CRICETULUS

XU Zhaohua, HUANG Wenji

Department of Biology, Fudan University

Online:2011-11-22 Published:2011-11-22

摘要/Abstract

摘要： 本文分析了仓鼠属三个种的常规核型及G带核型,即大搬仓鼠(Cricetulus triton)2n=28,长尾仓鼠(C.longicaudatus)2n=24,花背仓鼠(C.barabensis)2n=22。讨论时结合文献报道的短尾仓鼠(C.eversmanni),无斑短尾仓鼠(C.curtatus),灰仓鼠(C.migratorius)的有关核型资料作了比较,结果证明:(1)染色体是鉴别这6个种类的有效方法之一。(2)大搬仓鼠具有较原始的核型,可能是祖先进化中的一个早期分枝。(3)这6个种类的染色体进化机制主要是罗伯逊融合,但也有染色体的断裂、易位和倒转。

Abstract: The karyotypcs of three species of Genus Cricetulus, namely ,C.triton, C.Longicaudatus and C. barabensis were examined and described.C. triton has 28 chromosomes. the karyotype consists of 11 pairs of large to medium acrocentrics, 2 pairs of very small metacentrics, and a medium subtelocentric X and a small metacentric Y chromosomes.C. longicaudatus has a diploid number of 24.Its karyotype is composed of 4 pairs of large to medium metacentrics, 3 pairs of large and medium subtelocentrics, 4 pairs of medium acrocentrics and a large metacentric X and a submetacentric Y chromosomes; Y being also large in size。

徐肇华, 黄文几. 仓鼠属三个种的核型分析[J]. .

XU Zhaohua, HUANG Wenji. ON THE KARYOTYPES OF THREE SPECIES OF CRICETULUS[J]. .