Comparative cytogenetics among populations of Astyanax altiparanae (Characiformes, Characidae, Incertae sedis) |
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| Authors: | Ferreira Maressa Vicari Marcelo Ricardo de Camargo Edemar Furquim Artoni Roberto Ferreira Moreira-Filho Orlando |
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| Institution: | 1.Laboratório de Citogenética, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil;2.Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil |
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| Abstract: | Cytogenetic data are presented for Astyanax altiparanae populations from three Brazilian hydrographic systems. The chromosomal data obtained in A. altiparanae support the hypothesis of diploid number conservation. However, small differences in the karyotype formula and number of nucleolar organizer regions were observed in these populations. The apparent karyotypical similarity among the studied populations strongly suggests a close relationship among them with some chromosomal divergences due to gene flow restriction. |
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| Keywords: | cytotaxonomy karyotype diversification fish cytogenetics |
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