Genetica

, Volume 97, Issue 2, pp 225–233

Multiple-chromosome sex systems in the darkling beetles Blaps gigas and Blaps gibba (Coleoptera, Tenebrionidae)

  • R. Vitturi
  • E. Catalano
  • I. Sparacio
  • M. S. Colomba
  • A. Morello
Article

DOI: 10.1007/BF00054629

Cite this article as:
Vitturi, R., Catalano, E., Sparacio, I. et al. Genetica (1996) 97: 225. doi:10.1007/BF00054629

Abstract

We have studied mitotic and meiotic chromosomes in the males of two species of Blaps: B. gigas and B. gibba. Karyological characteristics such as the occurrence of a multivalent configuration at diakinesis and two types of metaphase-II spreads support the notion that multiple-chromosome sex systems involving five chromosomes in B. gigas and eight chromosomes in B. gibba have developed in these species. Results obtained by means of silver staining and C-banding techniques suggest that the complex sex systems occurring in B. gigas and B. gibba may have originated from exchanges of terminal ribosomal genes among the Y chromosome and some autosomes.

Key words

karyology banded chromosomes Coleoptera darkling beetles 

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • R. Vitturi
    • 1
  • E. Catalano
    • 1
  • I. Sparacio
    • 1
  • M. S. Colomba
    • 1
  • A. Morello
    • 1
  1. 1.Institute of ZoologyUniversity of PalermoPalermoItaly

Personalised recommendations