Genetica

, Volume 61, Issue 1, pp 13–20

Chromosome relationships in three representatives of the genusHolochilus (Rodentia, Cricetidae) from Brazil

Authors

  • T. R. O. Freitas
    • Departamento de Zoologia & Genética, Instituto de BiologiaUniversidade Federal de Pelotas
  • M. S. Mattevi
    • Departamento de Genética, Instituto de BiociênciasUniversidade Federal do Rio Grande do Sul
  • L. F. B. Oliveira
    • Departamento de Genética, Instituto de BiociênciasUniversidade Federal do Rio Grande do Sul
  • M. J. Souza
    • Departamento de Biologia Geral, Centro de Ciências BiológicasUniversidade Federal de Pernambuca
  • V. Vonenaga-Vassuda
    • Departamento de Biologia, Instituto de BiociênciasUniversidade de São Paulo
  • F. M. Salzano
    • Departamento de Biologia Geral, Centro de Ciências BiológicasUniversidade Federal de Pernambuca
Article

DOI: 10.1007/BF00563228

Cite this article as:
Freitas, T.R.O., Mattevi, M.S., Oliveira, L.F.B. et al. Genetica (1983) 61: 13. doi:10.1007/BF00563228

Abstract

The G- and C-banded karyotype ofHolochilus brasiliensis collected in central Brazil (2n=55, AN=56, acrocentric X and Y) can be regarded as the most representative of the ancestral form of the genus.H. magnus (2n=52, AN=58, acrocentric X and Y) andH. brasiliensis vulpinus (2n=40, AN=56), both living in southern Brazil, would be in different phases of chromosome number reduction due to centric fusions.H. magnus, in addition, shows an X of variable morphology and a metacentric Y. This fact, coupled with its distinct morphology and restricted distribution, suggests that it may represent a distinct trend in the genus' main evolutionary line.

Copyright information

© Dr W. Junk Publishers 1983