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Nucleolus Organizer Regions in Physalaemus Cuvieri (Anura, Leptodactylidae), with Evidence of a Unique Case of Ag-NOR Variability

2004; BioMed Central; Volume: 131; Issue: 2 Linguagem: Inglês

10.1111/j.1601-5223.1999.00135.x

1601-5223

Ana Paula Zampieri Silva, Célio F. B. Haddad, Sanae Kasahara,

Genomics and Phylogenetic Studies

We studied ten specimens of Physalaemus cuvieri collected at different localities in Brazil using conventional staining and banding techniques. All specimens had 2n = 22. There were karyotypic variants: distinct patterns in the number and chromosome localization of Ag-NORs as well as in the corresponding secondary constrictions. Preliminary C-banding patterns obtained for specimens from two localities are also suggestive of karyotypic differentiation in P. cuvieri.