, Volume 81, Issue 1, pp 1–3 | Cite as

Chromosome study of Amazona amazonica and A. aestiva (Aves: Psittaciformes): determination of chromosome number and identification of sex chromosomes by C-banding methods

  • R. Aquino
  • I. Ferrari


Two parrot species, Amazona amazonica and A. aestiva, submitted to cytogenetic analysis presented a diploid chromosome number of 2n=70 (20M+50m). With the C-banding pattern, the cells of female speciments showed an almost totally heterochromatic W chromosome. No chromosome differences were observed in the two species studied.


Chromosome Number Cytogenetic Analysis Chromosome Study Diploid Chromosome Number Parrot Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. De, Boer, L. E. M., 1984. New developments in vertebrate cytotaxonomy. VIII A current list of references on a vian karyology. Genetica 65: 3–37.Google Scholar
  2. De, Boer, L. E. M. & Belterman, R. H. R., 1980. The somatic chromosomes of three parrots: the kea (Nestor notabilis), the yellow-headed parrot (Amazona ochrocephala) and the grey parrot (Psittacus erithacus). Acta zool. pathol. antuerpiensia 75: 9–18.Google Scholar
  3. Forshaw, J. M., 1973. Parrots of the World. Melbourne. Landsdowne, 1973.Google Scholar
  4. Giannoni, M. L.; Giannoni, M.A. and Ferrari, I., 1986. Citogenética Aplicada às Aves: Técnicas. FEALO. 33–34pp.Google Scholar
  5. Scheres, J. M., 1972. Human chromosome banding. Lancet 1: 849.Google Scholar
  6. Schmutz, S. M. & Prus, S. E., 1987. A cytogenetic study of four species of cockatoos and Amazon parrots. Genetica 74: 69–71.Google Scholar
  7. Sick, H., 1985. Ornitologia Brasileira. Brasilia. Ed. UnB 1: 291–314.Google Scholar
  8. Sumner, A. T., 1972. A simple technique for demonstrating centromeric he terochromatin. Expl Cell Res. 75: 304–306.Google Scholar
  9. Van, Dongen, M. W. M. & De, Boer, L. E. M., 1984. Chromosome studies of 8 species of parrots of the families Cacatuidae and Psittacidae (Aves: Psittaciformes). Genetica 65: 109–117.Google Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • R. Aquino
    • 1
  • I. Ferrari
    • 2
  1. 1.Genetics Department, Ribeirão Preto Medical SchoolUniv. S. PauloBrazil
  2. 2.Genetics Department, Biosciences InstituteUniv. of BrasiliaBrazil

Personalised recommendations