Full text in pdf format
Karyotype of Oryzomys capito oniscus (Rodentia), from northeastern Brazil
Vilna Maia
Laboratório de Genética, Departamento de Biologia Geral, UFPE, 50000 Recife PE, Brasil
ABSTRACT
The katyotype of Oryzomys capito oniscus is reported (2n = 52, FN = 62), along with data on G,C banding and Ag-staining of nucleolar organizer regions (NORs). These data contribute to the study of chromosomal relationships within the capito complex.
Keywords: Karyotype; Oryzomys capito oniscus; Rodentia; Brazil.
REFERENCES
Almeida, E.J.C. (1980). Variabilidade citogenética nos gêneros Oryzomys e Thomazomys (Cricetidae, Rodentia). PhD Thesis, Univ. São Paulo, Brasil.
Baker, R.J., Koop, B.F. and Haiduk, M.W. (1983). Resolving systematic relationships with G bands: a study of five genera of South American cricetinae rodents. Syst. Zool. 32: 403-416.
Banos, R.M.S. (1978). Variabilidade cromossômica em Proechimys e Oryzomys (Rodentia) da Amazônia. PhD Thesis, Univ. São Paulo, Brasil.
Cabrera, A. (1961). Catalogo de los mamiferos de America del Sur. Rev. Mus. Argent. Cienc. Nat. 6: 309732.
Ford, C. and Hamerton, J.L. (1956). A colchicine hypotonic citrate squash sequence for mammalian chromosome. Stain Tech. 31: 247-251.
Gardner, A.L. and Patton, J.L. (1976). Karyotypic variation in Oryzomyne rodents (Cricetinae) with comment on chromosomal evolution in the Neotropical cricetine complex. Occ. Papers of Mus. Zool. 49: 1-48.
Hershkovitz, P. (1960). Mammals of Northern Colombia. Preliminary report no. 8: arboreal rice rats, a systematic revision of the subgenus Oecomys, genus Oryzomys. Proc. U.S. Nat. Mus. 110: 513-568.
Hershkovitz, P. (1966). South American swamp and fossorial rats of the Scapteromyne group (Cricetinae, Muridae) with comments on the glans penis in Murid taxonomy. Z. f. Saugetierk. 31: 81-149.
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. and Genoways, H.H. (1983). Numerous chromosomal polymorphisms in a natural population of rice rats (Oryzomys, Cricetidae). Cytog„ Cell Genet. 35: 131-135.
Maia, V. and Hulak, A. (1981). Robertsonian polymorphism in chromosomes of Oryzomys subflavus (Rodentia, Cricetidae). Cytog. Cell Genet. 31: 33-39.
Musser, G.G. and Williams, M.M. (1985). Systematic studies of Oryzomyne rodents (Muridae): definitions of Oryzomys villosus and Oryzomys talamancae. Amer. Mus. Novit. 2810: 1-22.
Pathak, S. and Stock, A.D. (1974). The X chromosome of mammals: karyological homology as revealed by banding techniques. Genetics 78: 703-714.
Perez-Zapata, A., Reig, OA., 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 banding 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, Y., Frota-Pessoa, O., Kasahara, S. and Almeida, E.J.C. (1976). Cytogenetics studies on Brazilian rodents. Cienc. Cult. 38: 202-211.