2020
DOI: 10.3390/genes11010091
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Abstract: Lebiasinidae is a Neotropical freshwater family widely distributed throughout South and Central America. Due to their often very small body size, Lebiasinidae species are cytogenetically challenging and hence largely underexplored. However, the available but limited karyotype data already suggested a high interspecific variability in the diploid chromosome number (2n), which is pronounced in the speciose genus Nannostomus, a popular taxon in ornamental fish trade due to its remarkable body coloration. Aiming t… Show more

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Cited by 16 publications
(17 citation statements)
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“…However, unlike other Pyrrhulina species, P. marilynae has the smallest 2n identified in the genus so far, 2n 32, including four typical meta/submetacentric pairs. Some exceptions within the subfamily showed secondary fusion events of acrocentric chromosomes giving rise to metacentric chromosomes, reducing the diploid number as observed in Nannostomus unifasciatus (Sember et al, 2020). Biarmed chromosomes could also represent remnants of the ancestral karyotype condition that were maintained during the evolutionary processes.…”
Section: Discussionmentioning
confidence: 95%
See 1 more Smart Citation
“…However, unlike other Pyrrhulina species, P. marilynae has the smallest 2n identified in the genus so far, 2n 32, including four typical meta/submetacentric pairs. Some exceptions within the subfamily showed secondary fusion events of acrocentric chromosomes giving rise to metacentric chromosomes, reducing the diploid number as observed in Nannostomus unifasciatus (Sember et al, 2020). Biarmed chromosomes could also represent remnants of the ancestral karyotype condition that were maintained during the evolutionary processes.…”
Section: Discussionmentioning
confidence: 95%
“…Because of their small sizes and difficulties in obtaining good chromosomal preparations, species of Lebiasinidae were, for a long time, little analyzed in terms of cytogenetics, with scarce references mainly on the chromosomal number of few species (Scheel, 1973;Oliveira et al, 1991;Arai, 2011). However, this scenario has recently undergone significant changes with the methodological advance of cytogenetics and its applicability among small to miniature fishes of Pyrrhulina, Lebiasina, Copeina, and Nannostomus genus (de Moraes et al, 2017Sassi et al, 2019;Toma et al, 2019;Sassi et al, 2020;Sember et al, 2020).…”
Section: Introductionmentioning
confidence: 99%
“…However, experiments conducted without Cot-1 DNA as a competitor produced the same results. Hybridization procedure followed our previous studies [37][38][39][40] and was performed for 1 day (24 h) in Boa constrictor and 3 days (72 h) for all the other species, at 37 • C in a dark and moist chamber. After washing procedures, the chromosomes were counterstained with DAPI (1.2 µg/mL) and mounted in antifade solution (Vector).…”
Section: Microdissection and Chromosome Painting Probe Preparationmentioning
confidence: 99%
“…Research on fish systematics and evolution has expanded over time, including, in recent decades, molecular taxonomy, developmental biology, and new tools like 3D imaging [ 2 ]. Cytogenetic analyses join these new tools, providing new evidence of the existence of cryptic species and evolutionary divergence ([ 7 ] and references therein) and giving rise to a prosperous field focused on neotropical species [ 8 , 9 ].…”
Section: Introductionmentioning
confidence: 99%