Considerations on karyotype evolution in the genera Imparfinis Eigenmann and Norris 1900 and Pimelodella Eigenmann and Eigenmann 1888 (Siluriformes: Heptapteridae)

Gouveia, Juceli Gonzalez; Moraes, Vivian Patrícia Oliveira de; Sampaio, Tatiane Ramos; Rosa, Renata da; Dias, Ana Lúcia

doi:10.1007/s11160-012-9286-2

Cited by 14 publications

(15 citation statements)

References 30 publications

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“…[33][34][35] This was supported by the results of this study. The only report of terminal NORs for the genus was described for I. hollandi, 13 a species with karyotypic autapomorphies.…”

Section: Discussionsupporting

confidence: 87%

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Cryptic Diversity Between Two Imparfinis Species (Siluriformes, Heptapteridae) by Cytogenetic Analysis and DNA Barcoding

FerreiraMilena

Frehner²,

Foresti³

et al. 2014

Zebrafish

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Five Imparfinis mirini and one Imparfinis minutus populations were studied using basic cytogenetic and molecular techniques. Cytogenetic analysis showed that I. mirini individuals presented the same diploid number 2n=58 (FN=116). However, they presented two distinct karyomorphs: karyomorph A (36m+18sm+4st) for the Mogi-Guaçu and Paranapanema basin populations, and karyomorph B (42m+12sm+4st) for the Tietê basin populations. I. minutus populations from the Paraíba do Sul basin presented a karyotype identical to karyomorph A of I. mirini. C-banding also presented distinct patterns, with a greater amount of heterochromatin, most of which was pericentromeric and interstitial for karyomorph A I. mirini and I. minutus. There was a minor amount of heterochromatin in karyomorph B, most of which was terminal and interstitial. Simple and interstitial nucleoli organizer regions were located in the biggest metacentric pair of the complement in all populations with GC-rich nature, and this location was confirmed by the fluorescent in situ hybridization technique with 18S ribosomal DNA with 5S rDNA synteny. In molecular analysis by DNA barcoding, two other populations from the Tietê basin were added. The phylogram showed that the populations were more related to the intrabasin. Cytogenetic resemblance among specimens from distinct basins may be the result of either recent convergence or ancestral feature retention not followed by mutations in mitochondrial DNA.

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“…[33][34][35] This was supported by the results of this study. The only report of terminal NORs for the genus was described for I. hollandi, 13 a species with karyotypic autapomorphies.…”

Section: Discussionsupporting

confidence: 87%

“…33 However, it does not seem to be associated with the surrounding heterochromatic blocks, which may suggest that the nontranscribed spacers of the ribosomal genes present a high CG content in its composition.…”

Section: Discussionmentioning

confidence: 99%

Cryptic Diversity Between Two Imparfinis Species (Siluriformes, Heptapteridae) by Cytogenetic Analysis and DNA Barcoding

FerreiraMilena

Frehner²,

Foresti³

et al. 2014

Zebrafish

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“…In many fish groups, including Curimatidae, there is a high correlation between AgNORs and secondary constriction (Feldberg et al 1992; Teribele et al 2008; Gouveia et al 2013). However, the presence of secondary constriction without rDNA sequences, as in Cyphocharax spilotus , is a characteristic rarely observed in fish.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary trends in the family Curimatidae (Characiformes): inferences from chromosome banding

Sampaio¹,

Pires²,

Venturelli³

et al. 2016

CCG

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The family Curimatidae is a fish group usually considered chromosomally conserved in their diploid number. However, some studies show small changes in the karyotype microstructure, and the presence of B chromosomes, indicating a chromosomal diversification within the group, even if structural changes in the karyotypes are not visible. Few studies associate this trait with an evolutionary pattern within the family. This study aimed to characterize the karyotype, (NORs)nucleolus organizer regions , and heterochromatin distribution of six species of Curimatidae of the genera Cyphocharax Fowler, 1906 and Steindachnerina Fowler, 1906: Cyphocharax voga (Hensel, 1870), Cyphocharax spilotus (Vari, 1987), Cyphocharax saladensis (Meinken, 1933), Cyphocharax modestus (Fernández-Yépez, 1948), Steindachnerina biornata (Braga et Azpelicueta, 1987) and Steindachnerina insculpta (Fernández-Yépez, 1948) and contribute data to a better understanding of the mechanisms involved in the chromosomal evolution of this group of fish. All specimens had 2n=54, m-sm, and B microchromosomes. Five species exhibited single NORs, except for Steindachnerina biornata, which showed a multiple pattern of ribosomal sites. NORs were chromomycin A3 positive (CMA3+) and 4’-6-diamino-2-phenylindole (DAPI-) negative, exhibiting differences in the pair and chromosomal location of each individual of the species. FISH with 5S rDNA probe revealed sites in the pericentrometic position of a pair of chromosomes of five species. However, another site was detected on a metacentric chromosome of Cyphocharax spilotus. Heterochromatin distributed both in the pericentromeric and some terminal regions was revealed to be CMA3+/DAPI-. These data associated with the previously existing ones confirm that, although Curimatidae have a very conservative karyotype macrostructure, NORs and heterochromatin variability are caused by mechanisms of chromosome alterations, such as translocations and/or inversions, leading to the evolution and diversification of this group of fish.

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“…The karyotype of 2n = 46 observed here in Pimelodella vittata is the same as reported for some other Pimelodella spp. (Dias and Foresti 1993, Vasconcelos and Martins-Santos 2000, Garcia and Almeida-Toledo 2010), Pimelodella avanhandavae (Eigenmann, 1917) (Vissoto et al 1999), Pimelodella meeki (Eigenmann, 1910) (Vidotto et al 2004, Garcia and Almeida-Toledo 2010, Borba et al 2011, Gouveia et al 2012), Pimelodella boschmai (Van der Stigchal, 1964) (Garcia and de Almeida-Toledo 2010) and Pimelodella gracilis (Valenciennes, 1836) (Garcia and de Almeida-Toledo 2010). Other Pimelodella species have different diploid chromosome numbers (Vasconcelos and Martins-Santos 2000, Swarça et al 2003, Garcia and de Almeida-Toledo 2010).…”

Section: Discussionmentioning

confidence: 99%

Cytogenetic study of heptapterids (Teleostei, Siluriformes) with particular respect to the Nemuroglanis subclade

Kantek¹,

Peres²,

Moreira‐Filho³

2015

CCG

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The catfish family Heptapteridae (order Siluriformes) is endemic to the Neotropics and is one of the most common of the fish families in small bodies of water. Although over 200 species have been identified in this family, very few have been characterized cytogenetically. Here, we analyze the chromosome genomes of four species of Heptapteridae: Cetopsorhamdia iheringi (Schubart & Gomes, 1959), 2n = 58, comprising 28 metacentric (m) + 26 submetacentric (sm) + 4 subtelomeric (st) chromosomes; Pimelodella vittata (Lütken, 1874), 2n = 46, comprising 16m + 22sm + 8st; Rhamdia prope quelen (Quoy & Gaimard, 1824), 2n = 58 comprising 26m + 16sm + 14st + 2 acrocentric; and Rhamdiopsis prope microcephala (Lütken, 1874), 2n = 56, comprising 12m + 30sm + 14st. The nucleolus organizer regions (NORs) were located in a single chromosome pair in all species. The two species that belonged to the subclade Nemuroglanis, Cetopsorhamdia iheringi and Rhamdia prope quelen, had a diploid chromosome number of 58 and an interstitial NOR adjacent to a C+ block located on one of the larger chromosome pairs in the complement. Our results from conventional cytogenetic techniques in combination with FISH using 18S and 5S rDNA probes corroborated the taxonomical hypothesis for the formation of the Nemuroglanis subclade.

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Considerations on karyotype evolution in the genera Imparfinis Eigenmann and Norris 1900 and Pimelodella Eigenmann and Eigenmann 1888 (Siluriformes: Heptapteridae)

Cited by 14 publications

References 30 publications

Cryptic Diversity Between Two Imparfinis Species (Siluriformes, Heptapteridae) by Cytogenetic Analysis and DNA Barcoding

Cryptic Diversity Between Two Imparfinis Species (Siluriformes, Heptapteridae) by Cytogenetic Analysis and DNA Barcoding

Evolutionary trends in the family Curimatidae (Characiformes): inferences from chromosome banding

Cytogenetic study of heptapterids (Teleostei, Siluriformes) with particular respect to the Nemuroglanis subclade

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