Chromosomal distribution of the major satellite DNA of South American rodents of the genus ctenomys

Maria Susana Rossi, C. A. Redi, G. Viale, A. I. Massarini, E. Capanna

Research output: Contribution to journalArticlepeer-review

Abstract

The chromosomal distribution of the major satellite DNA of South American rodents of the genus Ctenomys was analyzed in eight species by in situ hybridization, using a probe isolated from C porteousi. The hybridization patterns showed different numbers of chromosomes with positive pericentromeric regions and/or complete short arms. In some species, a positive signal was scarce (or not detectable, as in C. opimus), and was usually located in the pericentromeric areas (C. occultus and C latro). In those species where the satellite was highly amplified, its chromosomal localization tended to encompass the entire length of the short arms. These patterns were compared with C-band distribution patterns in the same species. We discuss the putative evolutionary trend of this satellite DNA in the genus Ctenomys and suggest that it evolved from a strictly pericentromeric localization to comprising the whole short arms of some chromosomes.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalCytogenetic and Genome Research
Volume69
Issue number3-4
DOIs
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Genetics(clinical)
  • Cell Biology

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