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Vol. 132, No. 1-2, 2011
Issue release date: November 2010
Section title: Original Article
Cytogenet Genome Res 2011;132:47–54
(DOI:10.1159/000318012)

Comparative Analysis by Chromosome Painting of the Sex Chromosomes in Arvicolid Rodents

Acosta M.J. · Romero-Fernández I. · Sánchez A. · Marchal J.A.
Departamento de Biología Experimental, Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain

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Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: 3/22/2010
Published online: 7/30/2010
Issue release date: November 2010

Number of Print Pages: 8
Number of Figures: 1
Number of Tables: 0

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR

Abstract

Sex chromosome evolution in mammals has been extensively investigated through chromosome-painting analyses. In some rodent species from the subfamily Arvicolinae the sex chromosomes contain remarkable features such as giant size, a consequence of heterochromatic enlargement, or asynaptic behaviour during male meiosis. Here, we have made a comparative study of the sex chromosomes in 6 arvicolid species using different probes from the X and Y chromosomes of 3 species, in order to gain knowledge about intra- or interspecific preservation of euchromatic regions. Our results clearly reveal poor conservation of the euchromatic region of the Y chromosome within these species, while the euchromatin on the X chromosome is extremely well preserved. Furthermore, we detected no clear correlation between the synaptic/asynaptic behaviour of the sex chromosomes, and the presence or absence of sequence homology within their euchromatic regions. Notably, our study has shown a new relationship between the giant sex chromosomes of 2 species, Microtus agrestis and Microtus cabrerae, that is, both X and Y share a novel region of common sequences in the euchromatin that is not present in the other species analysed. This interspecific euchromatic conservation, limited to the giant sex chromosomes, could point towards a common evolutionary origin for the heterochromatic enlargement process that has characterized the evolution of the sex chromosomes in some arvicolid species.

© 2010 S. Karger AG, Basel


  

Author Contacts

Dr. Juan Alberto Marchal Ortega
Departamento de Biología Experimental
Facultad de Ciencias Experimentales, Universidad de Jaén
Paraje Las Lagunillas s/n, ES–23071 Jaén (Spain)
Tel. +34 953 213 381, Fax +34 953 211 875, E-Mail jamaor@ujaen.es

  

Article Information

Accepted: March 22, 2010 by M. Schmid
Published online: July 30, 2010
Number of Print Pages : 8
Number of Figures : 1, Number of Tables : 0, Number of References : 44

  

Publication Details

Cytogenetic and Genome Research

Vol. 132, No. 1-2, Year 2011 (Cover Date: November 2010)

Journal Editor: Schmid M. (Würzburg)
ISSN: 1424-8581 (Print), eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR


Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: 3/22/2010
Published online: 7/30/2010
Issue release date: November 2010

Number of Print Pages: 8
Number of Figures: 1
Number of Tables: 0

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR


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