棕色田鼠（啮齿目）的染色体多态性

Chromosomal polymorphism of mandarin vole, Microtus mandarinus (Rodentia).

作者信息

Wang J X, Zhao X F, Deng Y, Qi H Y, Wang Z J

机构信息

Department of Biology, School of Life Sciences, Shandong University, Jinan, P.R. China.

出版信息

Hereditas. 2003;138(1):47-53. doi: 10.1034/j.1601-5223.2003.01615.x.

DOI:10.1034/j.1601-5223.2003.01615.x

PMID:12830984

Abstract

The mitotic and meiotic chromosomes of mandarin vole, Microtus mandarinus Milne-Edwards, from Shandong Province of China were analyzed by conventional, G- and C-banding and Silver-staining techniques. We detected chromosomal polymorphism in the vole, exhibiting diploid chromosome numbers 2n = 48-50 and variable morphology of the 1st pair, one medium sized telocentric pair and the X chromosomes. Four types of karyotypes were revealed in the population. According to banding analysis, there were pericentric inversion, Robertsonian fusion and translocation in M. mandarinus karyotype evolution. The X displayed two different morphologies, which could be explained by prericentric inversion and a telocentric autosome translocation.

摘要

运用常规、G带和C带以及银染技术，对来自中国山东省的棕色田鼠（Microtus mandarinus Milne-Edwards）的有丝分裂和减数分裂染色体进行了分析。我们检测到该田鼠存在染色体多态性，其二倍体染色体数目为2n = 48 - 50，且第1对染色体、一对中等大小的端着丝粒染色体和X染色体的形态存在变异。在该种群中发现了四种核型。根据带型分析，棕色田鼠核型进化过程中存在着臂间倒位、罗伯逊融合和易位。X染色体呈现出两种不同形态，这可以通过臂间倒位和一条端着丝粒常染色体易位来解释。