Contents

Abstract

In marsupial karyotypes with little heterochromatin, the telomeric sequence (T2AG3)n, is involved in chromosome rearrangements. Here we compare the distribution of the (T2AG3)n sequence in chromosomes recently derived by fusions and other rearrangements (7–0.5 MYBP) with its distribution in chromosomes derived earlier (24–9 MYBP). We have previously shown that the (T2AG3) n sequence is consistently retained during chromosome rearrangements that are recent (7–0.5 MYBP). We suggest that in less recent rearrangements (24–9 MYBP) the pattern observed is initial retention followed by loss or amplification. We also suggest that the presence of interstitial (T2AG3)n sequence is related to the evolutionary status of single chromosomes rather than entire karyotypes.

 
Available from

Bibliographic Data

Title
Mapping the distribution of the telomeric sequence (T2AG3) in the Macropodoidae (Marsupialia) by fluorescence in situ hybridization. II. The ancestral 2n=22 macropodid karyotype
Author
Metcalfe, C.J; Eldridge, M.D.B; Johnston, P.G.
Year
2007
Publication Type
Refereed Article
Journal
Cytogenetic and Genome Research
Number of pages
212-217
Images
False
Volume
116
Issue
3
DOI
10.1159/000098189
Full Text
Available from