Nucleolus organizer regions in Physalaemus cuvievi (Anura, Leptodactylidae), with evidence of a unique case of Ag-NOR variability |
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| Authors: | Silva A P Haddad C F Kasahara S |
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| Institution: | Departamento de Biologia, Instituto de Biociéncias Universidade Estadual Paulista, UNESP, Brasil. |
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| Abstract: | 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. |
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