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Populational study of chromosome polymorphism in Zonotrichia capensis (Emberizidae, Passeriformes, Aves)

Edislane Barreiros de Souza; Edmundo José de Lucca

Departamento de Genética, Instituto de Biociências - UNESP, 18600 Botucatu, SP, Brasil

ABSTRACT

The karyotypes of 328 specimens of Zonotrichia capensis from four regions, three in the state of Paraná and one in the state of São Paulo (Brazil), were studied. This species presents a chromosomal polymorphism due to pericentric inversion, involving the 3^rd and ^5th chromosome pairs. Chromosome 3 exists in the 3^st and 3^sm conditions and chromosome 5, in 5^st and 5^m conditions. Mitotic metaphase spreads were obtained from bone-marrow material of colchicine-treated animals. At all collection sites the frequency of chromosome 5^m was considerably lower than that of the inverted chromosome 3^sm. The present work tried to establish a correlation between the frequencies of the 3^rd and 5^th chromosome pairs with the climatical and geographical parameters at the collecting regions. Data show that the frequency of chromosome 5^m is higher in regions with low temperature and high altitude.

Keywords: Chromosome polymorphism; Zonotrichia capensis; Aves.

REFERENCES

Ansari, H.A. and Raul, D. (1979). Inversion polymorphism in common pigeon, Theron phoenicoptera (Latham) (Aves). J. Genet. 54: 197-202.

Bass, R (1979). Chromossomal polymorphism in Cardinalis cardinalis. Can. J. Genet. Cytol. 21: 549-553.

Bulatova, N.S. (1981). A comparative karyological study of passerine birds. Acta Sc. Nat. Brno. 15: 1-44.

Carvalho, M.U.P. (1989). Estudos citogenéticos na família Fringillidade (Passeriformes, Aves). Masters Thesis. Universidade Federal do Rio Grande do Sul.

Carvalho, M.U.P. and Erdtmann, B. (1987). Ocorrência de polimorfismo cromossômico em tico-tico (Zonotrichia capensis) nos estados de Espírito Santos e Rio Grande do Sul. Resumos da 39º Reunião Anual da SBPC, Brasília.

Challey, L.C. (1983). La Biogeografia desde mi punto de vista. Atas del congres. Latinoamericano Zool. 1: XVI 784p, Caracas.

Hammar, B. (1970). The karyotypes of thirty-one birds. Hereditas 65: 29-58.

Hammar, B. and Herlin, B. (1975). Karyotypes of four birds species of the order Passeriformes. Hereditas 8a 177-184.

Handford, P. (1983). Continental patterns of morphological variation in a South American Sparrow. Evolution 37: 920-930.

Lee, M.R. and Elder, F.F. (1980). Yeast stimulation of bone marrow mitosis for cytogenetic investigations. Cytogen. Cell Genet. 26: 36-40.

Lucca, E.J. de and Rocha, G.T. (1985). Chromosomal polymorphism in Zonotrichia capensis (Passeriformes, Aves). Rev. Brasil. Genet. VIII: 71-78.

Ray-Chaudhuri, R. (1976). Cytotaxonomy and chromosome evolution in Passeriformes (Aves). Z. Zool. Syst. Evol. 14: 299-320.

Rising, J.D. and Shields, G.F. (1980). Chromosomal and morphological correlates in two new world sparrows (Emberizidae). Evolution 34: 654-662.

Rocha, G.T. (1987). Estudo do complemento cromossômico e da região organizadora de nucléolo em algumas espécies de Aves. Masters Thesis, UNESP, Botucatu.

Shields, G.F. (1973). Chromosomal polymorphism in common to several species of Junco (Aves). Can. J. Genet. Cytol.15: 461-471.

Stansfield, W.D. (1985). Genetica. MacGraw-Hill do Brasil Ltda., 515 p.

Thorneycroft, H.B. (1966). Chromosomal polymorphism in the white-throated Sparrow, Zonotrichia albicollis. Science 154: 1571-1572.

Thorneycroft, H.B. (1975). A cytogenetic study of the white-throated Sparrow. Zonotrichia albicollis. Evolution 29: 611-621.