Mapping the distribution of the telomeric sequence (T2AG 3)n in the Macropodoidea (Marsupialia) by fluorescence in situ hybridization. II. The ancestral 2n = 22 macropodid karyotype

C. J. Metcalfe*, M. D. B. Eldridge, P. G. Johnston

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In marsupial karyotypes with little heterochromatin, the telomeric sequence (T2AG3)n, is involved in chromosome rearrangements. Here we compare the distribution of the (T2AG 3)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 (T 2AG3)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.

Original languageEnglish
Pages (from-to)212-217
Number of pages6
JournalCytogenetic and Genome Research
Volume116
Issue number3
DOIs
Publication statusPublished - Feb 2007

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