Localization and Characterization of Heterochromatin among Four Species of the Montium Subgroup of Drosophila

Abstract

The karyotype of 4 species namely D. agumbensis, D. anomelani, D. truncata and D. cauverii have been analysed. The heterochromatin content has been characterized by using C- and Q-profiles. The Y- and 4th chromosome have shown a great degree of divergence in their form and size. The heterochromatin has played a very important role in bringing about this high degree of differentiation within the limit of 2n=8 among the members of the montium subgroup of Drosophila.