Cytogenetics of two sympatric Corydoras species (pisces, siluriformes, challichtyidae) of Southern Brazil

Brazilian Journal of Biology

R. F. Artoni¹  M. L. Terêncio¹  M. R. Vicari²  M. C. A. Matiello¹  M. M. Cestari²  L. A. C. Bertollo² 

[1] ,Universidade Estadual de Ponta Grossa Departamento de Biologia Estrutural, Molecular e Genética Ponta Grossa PR ,Brazil

关键词: karyotype;    sympatry;    heterochromatin;    NORs;    rDNA;    cariótipo;    simpatria;    heterogrmatina;    RONs;    DNAr;   

DOI  :  10.1590/S1519-69842006000200002

来源: SciELO

【 摘 要 】

Karyotypic data are presented for two sympatric Corydoras species of the Lagoa Dourada, namely, C. ehrhadti and C. paleatus, which are found in the upper Tibagi river basin (Ponta Grossa, State of Paraná, Brazil). The same diploid number and karyotypic formula were observed in both species/populations. A great similarity in the constitutive heterochromatin distribution and in the activity of nucleolar organizer regions was also found. The use of in situ hybridization with a fluorescent 18S rDNA probe allowed for the identification of the species/populations through the location of ribosomal sites.

【 授权许可】

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