Trends of karyotypical evolution in the pearl cichlid, Geophagus brasiliensis, from southern Brazil

Perazzo, Giselle Xavier; Noleto, Rafael Bueno; Vicari, Marcelo Ricardo; Gava, Adriana; Cestari, Marta Margarete

doi:10.1016/j.zool.2013.07.002

Cited by 7 publications

(7 citation statements)

References 52 publications

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“…The simple 5S rDNA cistrons found in Gymnogeophagus setequedas were located in an interstitial position on the long arm of the subtelocentric chromosome pair 4, which is a similar configuration to that found in other geophagin species, such as Satanoperca jurupari (Nakajima et al, 2012), Geophagus proximus (Schneider et al, 2013) and G. brasiliensis (Vicari et al, 2006;Perazzo et al, 2013), and species from closely-related tribes, such as Cichla monoculus (Cichlini), Astronotus ocellatus (Astronotini) (Schneider et al, 2013), and Australoheros angiru (Heroini) (Paiz et al, 2014). However, these cistrons are found in different locations in other species.…”

Section: Discussionsupporting

confidence: 74%

“…However, these cistrons are found in different locations in other species. In G. brasiliensis (Perazzo et al, 2013) and Bujurquina peregrinabunda (Cichlini) (Schneider et al, 2013), for example, they are found in a terminal position on the long 6 e160035 [6] arm of the subtelo-acrocentric chromosomes. In Hoplarchus psittacus (Heroini), they are found in a terminal position on the short arm of the subtelo-acrocentric chromosomes, while in Symphysodon discus (Heroini), they are in a terminal position on the short arm of the meta-submetacentric chromosomes (Schneider et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…This is a common pattern in Neotropical cichlids (Feldberg et al, 2003;Valente et al, 2012). However, while this is a conserved pattern, some variation has been observed, indicating the occurrence of rearrangements during the chromosomal evolution of some groups (Feldberg et al, 2003;Roncati et al, 2007;Perazzo et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Previous cytogenetic data are available for species of the genera Geophagus Heckel, 1840 (Vicari et al, 2006;Pires et al, 2010;Nakajima et al, 2012;Schneider et al, 2013;Perazzo et al, 2013), Gymnogeophagus Miranda Ribeiro, 1918 (Pires et al, 2010), Apistogramma Regan, 1913, Biotodoma Eigenmann & Kennedy, 1903and Satanoperca Günther, 1862(Poletto et al, 2010a. In the case of Gymnogeophagus, cytogenetic studies have focused on just three species, G. balzanii (Feldberg, Bertollo, 1984, 1985aRoncati et al, 2007), G. gymnogenys and G. labiatus (Pires et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution

et al. 2017

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We provide cytogenetic data for the threatened species Gymnogeophagus setequedas, and the first record of that species collected in the Iguaçu River, within the Iguaçu National Park's area of environmental preservation, which is an unexpected occurrence for that species. We verified a diploid number of 2n = 48 chromosomes (4sm + 24st + 20a) and the presence of heterochromatin in centromeric and pericentromeric regions, which are conserved characters in the Geophagini. The multiple nucleolar organizer regions observed in G. setequedas are considered to be apomorphic characters in the Geophagini, whereas the simple 5S rDNA cistrons located interstitially on the long arm of subtelocentric chromosomes represent a plesiomorphic character. Because G. setequedas is a threatened species that occurs in lotic waters, we recommend the maintenance of undammed environments within its known area of distribution.Keywords: Chromosomes, Conservation, Iguaçu River, Karyotype, Paraná River.Fornecemos dados citogenéticos para a espécie ameaçada Gymnogeophagus setequedas, e o primeiro registro da espécie coletado no rio Iguaçu, na área de preservação ambiental do Parque Nacional do Iguaçu, a qual é uma área de ocorrência inesperada para esta espécie. Verificamos em G. setequedas 2n = 48 cromossomos (4sm + 24st + 20a) e heterocromatina presente nas regiões centroméricas e pericentroméricas, as quais indicam caracteres conservados em Geophagini. Múltiplas regiões organizadoras de nucléolos foram observadas em G. setequedas e são consideradas características apomórficas em Geophagini, enquanto cístrons de DNAr 5S simples e localizados intersticialmente no braço longo de cromossomos subtelocêntricos representam uma característica plesiomórfica. Visto que G. setequedas é uma espécie ameaçada de extinção que ocorre em águas lóticas, recomendamos a manutenção de ambientes livre de barragens em sua área de distribuição.

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Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution

et al. 2017

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“…Multiple chromosomal rearrangements, including fusions and inversions, have occurred since the divergence of two haplochromine species, Haplochromis chilotes and Astatotilapia burtoni (74). Many populations segregate for various inversions within the Neotropical genus Geophagus (110). An analysis of paired-end genomic sequences detected several thousand rearrangements among the five cichlid genomes sequenced by the Cichlid Genome Consortium (S.H.…”

Section: Figurementioning

confidence: 99%

The Evolutionary Genomics of Cichlid Fishes: Explosive Speciation and Adaptation in the Postgenomic Era

Henning¹,

Meyer

2014

Annu. Rev. Genom. Hum. Genet.

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With more than 1,500 species, cichlid fishes provide textbook examples of recent and diverse adaptive radiations, rapid rates of speciation, and the parallel evolution of adaptive phenotypes among both recently and distantly related lineages. This extraordinary diversity has attracted considerable interest from researchers across several biological disciplines. Their broad phenotypic variation coupled with recent divergence makes cichlids an ideal model system for understanding speciation, adaptation, and phenotypic diversification. Genetic mapping, genome-wide analyses, and genome projects have flourished in the past decade and have added new insights on the question of why there are so many cichlids. These recent findings also show that the sharing of older DNA polymorphisms is extensive and suggest that linage sorting is incomplete and that adaptive introgression played a role in the African radiation. Here, we review the results of genetic and genomic research on cichlids in the past decade and suggest some potential avenues to further exploit the potential of the cichlid model system to provide a better understanding of the genomics of adaptation and speciation.

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Genotoxic Damages and Bioaccumulation of Cadmium in Geophagus Brasiliensis (Quoy & Gaimard, 1824)

Queiroz

Silva²,

Salla

et al. 2019

Bull Environ Contam Toxicol

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Trends of karyotypical evolution in the pearl cichlid, Geophagus brasiliensis, from southern Brazil

Cited by 7 publications

References 52 publications

Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution

Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution

The Evolutionary Genomics of Cichlid Fishes: Explosive Speciation and Adaptation in the Postgenomic Era

Genotoxic Damages and Bioaccumulation of Cadmium in Geophagus Brasiliensis (Quoy & Gaimard, 1824)

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