Full text in pdf format

 

The karyotype of Oryzomys capito laticeps (Cricetidae, Rodentia) from central Brazil

 

 

Marta Svartman; Eunice Judith Cardoso de Almeida

Departamento de Biologia, Universidade de São Paulo, Caixa Postal 11461, 05422-970 São Paulo, SP, Brasil. Send correspondence to E.J.C.A.

 

 


ABSTRACT

Cytogenetical data, including G-, C-, R-bands and NORs of Oryzomys capito laticeps (2n-54; FN-62) captured in Central Brazil are presented. The karyotype described in this paper is compared with those of other O. capito specimens.

Keywords: Karyotype; Oryzomys capito laticeps; Rodentia.


 

 

REFERENCES

Almeida, E.J.C. and Yonenaga-Yassuda, Y. (1985). Robertsonian fusion, pericentric inversion and sex
chromosome heteromorphisms in Oryzomys subflavus (Cricetidae, Rodentia). Caryologia 38: 129-137.

Barros, R.M.S. (1978). Variabilidade cromossômica em Proechimys and Oryzomys (Rodentia) da Amazônia.
PhD Thesis, Universidade de São Paulo, São Paulo.

Baker, R.J., Koop, B.F. and Haiduk, M.W. (1983). Resolving systematic relationships with Q-bands: a study of human chromosomes using a BrdU treatment. Chromosome 58:51-61.

Dutrillaux, B., Couturier, J., Richer, C.L. and Viegas-Péquignot, E. (1976). Sequences of DNA replication in 277 R- and Q-bands of human chromosomes using a BrdU treatment. Chromosome 58: 51-61.

Elder, F.F.B. and Lee, M.R. (1985). The chromosomes of Sigmodon ochrognathus and S. fulviventer suggest a realignment of Sigmodon species groups. J. Maim. 66: 511-518.

Gardner, A.L. and Patton, J.L. (1976). Karyotypic variation in Oryzomyine rodents (Cricetinae) with comments on chromosomal evolution in the Neotropical cricetine complex. Occ. Papers of Mus. Zool. 49: 1-48.

Howell, W.M. and Black, D.A. (1980). Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method. Experientia 36: 1014-1015.

Koop, B.F., Baker, R.J., Haiduk, M.W. and Engstrom, M.D. (1984). Cladistical analysis of primitive G-band sequences for the karyotype of the ancestor of the Cricetidae complex of rodents. Genetica 64: 199-208.

Leitão, C. and Barros, R. (1977). Kauyotypic studies of Oryzomys (Rodentia) from Amazon region. HI Congresso Latino Americano de Genética, Uruguai: 242 (resumes).

Maia, V. (1990). Karyotype of Oryzomys capito oniscus (Rodentia) from Northeastern Brazil. Rev. Bras. Genet. 13: 377-382.

Perez-Zapata, A., Reig, O.A., Aguilera, M. and Ferrer, A. (1986). Cytogenetics and karyosystematics of South American oryzomyne rodents (Cricetidae: Sigmodontinae). I. A species of Oryzomys with low chromosome number from Northern Venezuela. Z. Sauget. 51: 368-378.

Seabright, M. (1971). A rapid technique for human chromosomes. Lancet 2: 971-972.

Sumner, A.T. (1972). A simple technique for demonstrating centromeric heterochromatin. Exptl. Cell Res. 75: 304-306.

Yonenaga-Yassuda, Y., Maia, V. and L'Abbate, M. (1988). Two tandem fusions and supernumerary chromosomes in Nectomys squamipes (Cricetidae, Rodentia). Rev. Bras. Genet. X: 209-220.

Zanchin, N.I.T. (1988). Estudos cromossômicos em orizominos e equimideos da Mata Atlântica. Masters Thesis, Universidade Federal do Rio Grande do Sul, Porto Alegre.