Chromosoma

, Volume 57, Issue 4, pp 377–386

Characterization of Drosophila heterochromatin

II. C- and N-banding
  • Sergio Pimpinelli
  • Gianfranco Santini
  • Maurizio Gatti
Article

DOI: 10.1007/BF00332161

Cite this article as:
Pimpinelli, S., Santini, G. & Gatti, M. Chromosoma (1976) 57: 377. doi:10.1007/BF00332161

Abstract

The C- and N-banding patterns of D. melanogaster, D. simulans, D. virilis, D. texana, D. ezoana and D. hydei were studied in comparison with quinacrine and Hoechst banding patterns. In all these Drosophila species the C bands correspond to the heterochromatin as revealed by the positive heteropycnosis in the prometaphase chromosomes. The N bands have the following characteristics: 1) they are always localized on the heterochromatin and generally do not correspond to the C bands; 2) they do not correspond to the nucleolar organizing regions; 3) they are inversely correlated with fluorescence, i.e., they correspond to regions which are scarcely, if at all, fluorescent after Hoechst 33258 or quinacrine staining; 4) they are localized both on regions containing AT rich satellite DNA and on those containing GC rich satellite DNA.

Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Sergio Pimpinelli
    • 1
  • Gianfranco Santini
    • 1
  • Maurizio Gatti
    • 1
  1. 1.Centro di Genetica Evolutiva del C.N.R.Istituto di Genetica, Università di Roma, Città UniversitariaRomaItaly

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