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Brazilian Journal of Genetics

Print version ISSN 0100-8455On-line version ISSN 1678-4502

Braz. J. Genet. vol.19 no.4 Ribeirão Preto  1996 

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Occurrence of Akodon cursor (Rodentia, Cricetidae) with 14, 15 and 16 chromosome cytotypes in the same geographic area in Southern Brazil



Ives José Sbalqueiro; André Paulo Nascimento

Departamento de Genética, Setor de Ciências Biológicas, Uni3versidade Federal do Paraná, Caixa Postal 19071, 81531-990 Curitiba, PR, Brasil. E-mail: Send correspondence to I.J.S.




The karyotype of Akodon cursor (initially identified as A. arviculoides) had been reported with chromosomal numbers 14 and 15 in the South and Southeast and 16 in Northeastern Brazil. We found the three cytotypes in a region of Southern Brazil. The G-band patterns of these specimens were the same as those from southeastern and northeastern regions. Seventeen different combinations of chromosomes due to a complex rearrangement in pair 1 and pericentric inversions in pairs 2 and 3 were identified. Seven of these combinations are new to in the literature.

Keywords: Akodon cursor; chromosome cytotypes; Southern Brazil.




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