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Table of Contents
Vol. 124, No. 2, 2009
Issue release date: May 2009
Section title: Original Article
Cytogenet Genome Res 2009;124:147–150
(DOI:10.1159/000207522)

Conservation of a chromosome arm in two distantly related marsupial species

Mohammadi A. · Delbridge M.L. · Waters P.D. · Marshall Graves J.A.
ARC Centre of Excellence for Kangaroo Genomics, Research School of Biological Sciences, The Australian National University, Canberra, ACT (Australia)

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Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: December 12, 2008
Published online: May 05, 2009
Issue release date: May 2009

Number of Print Pages: 4
Number of Figures: 1
Number of Tables: 1

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

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

Abstract

Marsupials, which diverged from eutherian mammals 150 million years ago (MYA), occupy a phylogenetic position that is very valuable in genome comparisons of mammal and other vertebrate species. Within the marsupials, the Australian and American clades (represented by the tammar wallaby Macropus eugenii, and the opossum Monodelphis domestica) diverged about 70 MYA. G-banding and chromosome painting suggest that tammar wallaby chromosome 6q has homology to opossum chromosome 7q. We tested this conservation by physically mapping the tammar wallaby orthologs of opossum chromosome 7q genes. We isolated 28 tammar wallaby BAC clones that contained orthologs of 16 opossum chromosome 7q genes. We used fluorescence in situ hybridization (FISH) to show that they all mapped specifically to the tammar wallaby chromosome 6q in nearly the same order as their orthologs on opossum chromosome 7q. Thus this chromosome arm is genetically, as well as cytologically, conserved over the 55–80 million years that separate kangaroos and the opossum.

© 2009 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: December 12, 2008
Published online: May 05, 2009
Issue release date: May 2009

Number of Print Pages: 4
Number of Figures: 1
Number of Tables: 1

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

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


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