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Genetics and Molecular Biology

Print version ISSN 1415-4757On-line version ISSN 1678-4685


MARGARIDO, Vladimir Pavan  and  GALETTI JUNIOR, Pedro Manoel. Heterochromatin patterns and karyotype relationships within and between the genera Brycon and Salminus (Pisces, Characidae). Genet. Mol. Biol. [online]. 1999, vol.22, n.3, pp.357-361. ISSN 1415-4757.

Chromosomes of two Brycon species (B. lundii and B. microlepis) and Salminus hilarii were analyzed. Based on constitutive heterochromatin distribution patterns, karyotypic relationships within and between Bryconinae and Salmininae were examined. A monophyletic origin for the genus Brycon, comprising at least two chromosome synapomorphies (presence of two large submetacentric bearing paracentromeric and telomeric heterochromatin), is suggested. Moreover, Bryconinae and Salmininae may represent a monophyletic unit among Characidae, as they share several chromosome features.

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