2016
DOI: 10.1590/1519-6984.15414
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Abstract: The group Incertae sedis within the Characidae family currently includes 88 genera, previously included in the subfamily Tetragonopterinae. Among them is the genus Astyanax comprising a group of species with similar morphology and widely distributed in the Neotropics. Thus, the present study aimed to analyze the karyotype diversity in Astyanax species from different watersheds by conventional Giemsa staining, C-banding and fluorescence in situ hybridization (FISH rDNA 18S) probe.specimens of Astyanax aff. para… Show more

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Cited by 6 publications
(4 citation statements)
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“…paranae 2n = 50 and A . fasciatus 2n = 46–48) 62 64 . Therefore, the interrupted meiosis and sterility of the hybrids found in the present study are probably related to the presence of extra chromosomes, which possibly do not have homologous pairs, preventing the progression of meiosis and, consequently, formation of gametes in these specimens 1 .…”
Section: Discussionmentioning
confidence: 99%
“…paranae 2n = 50 and A . fasciatus 2n = 46–48) 62 64 . Therefore, the interrupted meiosis and sterility of the hybrids found in the present study are probably related to the presence of extra chromosomes, which possibly do not have homologous pairs, preventing the progression of meiosis and, consequently, formation of gametes in these specimens 1 .…”
Section: Discussionmentioning
confidence: 99%
“…aff. bimaculatus in the literature, none of the specimens analysed in these studies could in fact belong to the species A. bimaculatus because the collection sites are not compatible with the distribution of this species in Brazil, that is, in the Amazon region (Cunha et al ., 2019; Jorge & Moreira‐Filho, 2001; Kavalco et al ., 2011; Morelli et al ., 1983; Nishiyama et al ., 2016; Pamponet et al ., 2008; Peres et al ., 2012).…”
Section: Species 2n Chromosome Formule Fn B Nor Cb 18s Rdna 5s Rdna (...mentioning
confidence: 99%
“…Astyanax species, for example, have high phenotypic plasticity and many morphological specializations that are related to their presence in different habitats (Costa‐Pereira et al ., 2016). These morphologic specializations can be a result of the high genetic diversity of this group as well as a result of different environmental pressures (Costa‐Pereira et al ., 2016; Matoso et al ., 2004; Nishiyama et al ., 2016; Peres et al ., 2005). In some places, Astyanax species coexist through resource partitioning, with adaptations in size and mouth position, teeth morphology and eye diameter (EDI) (Bonato et al ., 2017; Portella et al ., 2017; Santos et al ., 2011).…”
Section: Introductionmentioning
confidence: 99%