Comparative cytogenetics among populations of Astyanax altiparanae (Characiformes, Characidae, Incertae sedis)

Authors :: Orlando Moreira-Filho
Roberto Ferreira Artoni
Maressa Ferreira Neto
Edemar Furquim de Camargo
Marcelo Ricardo Vicari
Source :: Genetics and Molecular Biology, Genetics and Molecular Biology v.32 n.4 2009, Sociedade Brasileira de Genética (SBG), instacron:SBG, Genetics and Molecular Biology, Vol 32, Iss 4, Pp 792-796 (2009), ResearcherID, Genetics and Molecular Biology, Volume: 32, Issue: 4, Pages: 792-796, Published: 09 OCT 2009
Publication Year :: 2008
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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