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Comparative cytogenetics in Astyanax (Characiformes: Characidae) with focus on the cytotaxonomy of the group Neotropical Ichthyology
Tenório,Renata Cristina Claudino de Oliveira; Vitorino,Carla de Andrade; Souza,Issakar Lima; Oliveira,Claudio; Venere,Paulo Cesar.
Astyanax is a diverse group of Neotropical fishes, whose different forms occupy different environments. This great diversity is also reflected on cytogenetic aspects and molecular markers, which have repeatedly been demonstrated by cytogenetic studies. In order to characterize the karyotype of species of this genus, six species were studied: Astyanax altiparanae, A.argyrimarginatus, A. elachylepis, A. xavante, and two new species provisionally called Astyanax sp. and A. aff. bimaculatus. A detailed cytogenetic study based on conventional staining with Giemsa, AgNORs, C-banding, base-specific fluorochromes, and FISH using ribosomal genes 18S and 5S was conducted, aiming to understand some of the chromosomal mechanisms associated with the high...
Tipo: Info:eu-repo/semantics/article Palavras-chave: C-banding; CMA3 and DAPI fluorochromes; Fish chromosome; RDNA genes; NORs.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300553
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