Supernumerary chromosomes in the pufferfish Sphoeroides spengleri: first occurrence in marine Teleostean Tetraodontiformes fish

Alves, Anderson Luís; Porto‐Foresti, Fábio; Oliveira, Cláudio; Foresti, Fausto

doi:10.1590/s1415-47572008000200014

Cited by 7 publications

(6 citation statements)

References 13 publications

(16 reference statements)

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“…They have been described for a large of number of plant and animal species (Jones & Rees, 1982;Camacho et al, 2000), and have been observed in more than 40 freshwater fish species (Oliveira et al, 2000). B chromosomes seem to be less frequent in marine fish and have been described in Upeneus parvus (Perciformes) (Pauls et al, 1996), Sphoeroides spengleri and Chilomycterus spinosus (Tetraodontiformes) (Alves et al, 2008;Noleto, 2009), among others.…”

Section: Introductionmentioning

confidence: 99%

Derived cytogenetic traits, multiple NORs and B chromosomes in the compact karyotype of Canthigaster figueiredoi (Tetraodontiformes)

2010

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Section: Introductionmentioning

confidence: 99%

Derived cytogenetic traits, multiple NORs and B chromosomes in the compact karyotype of Canthigaster figueiredoi (Tetraodontiformes)

2010

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“…An alternative way of evolutionary dynamics would be the intense chromosomal rearrangements involved in genome size reduction in Tetraodontidae species, making a favorable condition for the origin and maintenance of B chromosomes (Martinez et al 2010). The micro Bs already were described for S. spengleri from Ubatuba Bay, São Paulo, Brazil (Alves et al 2008), fact that might indicate a common origin for these B chromosomes, hypothesis supported by the recent formation of Brazilian bays (Suguio et al 1985).…”

Section: Discussionmentioning

confidence: 96%

“…In neotropical fishes the occurrence the supernumerary chromosomes is a sporadic event, mainly in marine species (Pauls et al 1996). In Tetraodontiformes the unique reports about the presence of B chromosomes was in Sphoeroides spengleri from São Paulo Coast (Alves et al 2008) and in Canthigaster figueiredoi (Martinez et al 2010), both of the family Tetraodontidae.…”

Section: Introductionmentioning

confidence: 99%

“…a Giemsa stained karyotype with the NOR-bearing chromosome pair (box); b Metaphase of the female showing three B microchromosomes (arrows); c C-bands on B chromosomes (arrows) and on NORs (arrowheads); d Double FISH technique showing 18S rDNA sites (arrowheads) and 5S rDNA sites (arrows). Bar = Noleto et al 2007;Alves et al 2008), show a remarkable conservatism, being considered the plesiomorphic character for most families(Choudhury et al 1982;Brum et al 1995), while the Diodontidae species show diploid number variation from 46 to 52 (Sá-Gabriel and Molina 2005 and references therein).…”

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confidence: 99%

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Variable B chromosomes frequencies between males and females of two species of pufferfishes (Tetraodontiformes)

Noleto

Vicari

Cestari

et al. 2011

Rev Fish Biol Fisheries

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Cytogenetic analysis in two sympatric species of pufferfish from Paraná Coast, Brazil, Sphoeroides spengleri (Tetraodontidae) and Chilomycterus spinosus (Diodontidae) revealed the presence of 2n = 46 and 2n = 50 chromosomes, respectively. In S. spengleri, the double FISH technique with 5S and 18S rDNA probes showed no syntenical organization, with both multigene families occupying a terminal position on the chromosomes. In S. spengleri the poor pattern of heterochromatin distribution is discussed about its relation with the compactness of their genome. On the other hand C. spinosus presented conspicuous blocks occupying the short arms of several chromosomes, possibly consequence of an accumulative process. Heterochromatic supernumerary chromosomes were detected in both species, however in S. spengleri they were presented as microchromosomes varying of 0-3 and being more frequent in females than in males, possibly as result of a preferential segregation. Conversely in C. spinosus an extra chromosome was restricted to the males, which to behave as univalent during meiosis. In view of these peculiarities we hypothesized a possible relationship between B chromosome and sex determination, although others aspects on accumulation, maintenance, and frequency of these extra elements were also considered, focusing on the parasitic model. In spite of the karyotypic diversity and others genetic peculiarities in Tetraodontiformes, this corresponds the third report of the occurrence of chromosomes B in the group.

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“…In fishes, they have been already described in Characiformes (Mizoguchi & Martins-Santos, 1997;Voltolin et al, 2010), Labriformes (cited as Perciformes, Roncatti et al, 2007;Poletto et al, 2010), Siluriformes ShimabukuroDias et al, 2005;Blanco et al, 2012), Gymnotiformes (Mendes et al, 2012) and Tetraodontiformes (Alves et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

B chromosome and NORs polymorphism in Callichthys callichthys (Linnaeus, 1758) (Siluriformes: Callichthyidae) from upper Paraná River, Brazil

et al. 2014

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B chromosomes are extra chromosomes from the normal chromosomal set, found in different organisms, highlighting their presence on the group of fishes. Callichthys callichthys from the upper Paraná River has a diploid number of 56 chromosomes (26 m-sm + 30 st-a) for both sexes, with the presence of a sporadically acrocentric B chromosome. Moreover, one individual presented a diploid number of 57 chromosomes, with the presence of a morphologically ill-defined acrocentric B chromosome in all analyzed cells. The physical mapping of 5S and 18S rDNA shows multiple 5S rDNA sites and only one pair of chromosomes with 18S sites in C. callichthys, except for two individuals. These two individuals presented a third chromosome bearing NORs (Ag-staining and 18S rDNA) where 5S and 18S rDNA genes are syntenic, differing only in position. The dispersion of the 18S rDNA genes from the main st-a chromosome pair 25 to one of the chromosomes from the m-sm pair 4 would have originated two variant individuals, one of which with the ill-defined acrocentric B chromosome. Mechanisms to justify the suggested hypothesis about this B chromosome origin are discussed in the present study.Cromossomos B são cromossomos extras ao conjunto cromossômico normal, encontrado em diferentes organismos, com destaque para sua presença no grupo de peixes. Callichthys callichthys do alto rio Paraná tem um número diploide de 56 cromossomos (26 m-sm + 30 st-a) para ambos os sexos, com a presença esporádica de um cromossomo B acrocêntrico. Além do mais, um indivíduo apresentou número diploide de 57 cromossomos, com a presença de um cromossomo B acrocêntrico morfologicamente mal definido em todas as células analisadas. O mapeamento físico do DNAr 5S e 18S mostrou múltiplos sítios de DNAr 5S e apenas um par de cromossomos com sítio para o DNAr 18S em C. callichthys, com exceção para dois indivíduos. Estes dois indivíduos apresentaram um terceiro cromossomo portador das RONs (Ag-RONs e 18S rDNA), onde os genes DNAr 5S e 18S são sintênicos, diferindo apenas na posição. A dispersão dos genes DNAr 18S do par de cromossomos principal st-a 25 para um dos cromossomos do par m-sm 4 teria originado dois indivíduos variantes, um dos quais com cromossomo B acrocêntrico mal definido. Mecanismos para justificar a hipótese sugerida sobre a origem deste cromossomo B são discutidos no presente estudo.

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Supernumerary chromosomes in the pufferfish Sphoeroides spengleri: first occurrence in marine Teleostean Tetraodontiformes fish

Cited by 7 publications

References 13 publications

Derived cytogenetic traits, multiple NORs and B chromosomes in the compact karyotype of Canthigaster figueiredoi (Tetraodontiformes)

Derived cytogenetic traits, multiple NORs and B chromosomes in the compact karyotype of Canthigaster figueiredoi (Tetraodontiformes)

Variable B chromosomes frequencies between males and females of two species of pufferfishes (Tetraodontiformes)

B chromosome and NORs polymorphism in Callichthys callichthys (Linnaeus, 1758) (Siluriformes: Callichthyidae) from upper Paraná River, Brazil

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