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Schott SCQ, Glugoski L, Azambuja M, Moreira-Filho O, Vicari MR, Nogaroto V. Comparative Cytogenetic and Sequence Analysis of U Small Nuclear RNA Genes in Three Ancistrus Species (Siluriformes: Loricariidae). Zebrafish 2022; 19:200-209. [PMID: 36099209 DOI: 10.1089/zeb.2022.0040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Ancistrus presents a wide karyotypic diversity, resulting from numeric and structural chromosomal rearrangements. It has been proposed that some genome-specific regions containing repetitive units could organize prone-to-break DNA sites in Loricariidae, triggering chromosomal rearrangements such as Robertsonian fusions (Rb fusions), centric fissions, translocations, and inversions. The tandemly repeats of the small nuclear RNAs (snRNAs) gene families are considered good cytogenetic markers for understanding chromosomal remodeling events among closely related species, but these snRNAs have been scarcely analyzed in Ancistrus. This study presented the nucleotide sequencing and comparative in situ location of U snRNA sequences from Ancistrus aguaboensis, Ancistrus cf. multispinis, and Ancistrus sp. (2n = 50, 52, and 50, respectively), aiming to provide information about snRNA clusters in the genome and chromosome evolution in Ancistrus. U snRNA nucleotide sequences of Ancistrus presented identity to orthologous copies and folded their secondary structures correctly. In situ localization and karyotyping of the three Ancistrus species revealed clustered copies of U2 and U5 snRNA gene families to a single chromosome site, one chromosome pair bearing U1 snRNA sequence, and one main locus of U4 snRNA sequence, besides scattered signals along the chromosomes. Previous studies related the participation of the rRNA gene families in centric fusion events, contributing to chromosome rearrangements and karyotype plasticity present in Loricariidae. In this study, homeologies in U snRNA loci chromosomal locations were detected, indicating the occurrence of conserved sites of these gene families in these three Ancistrus species with 2n = 50 or 52 chromosomes.
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Affiliation(s)
| | - Larissa Glugoski
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Matheus Azambuja
- Departamento de Genética, Programa de Pós-Graduação em Genética, Universidade Federal do Paraná, Curitiba, Brazil
| | - Orlando Moreira-Filho
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Marcelo Ricardo Vicari
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Brazil
| | - Viviane Nogaroto
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Brazil
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Araya-Jaime CA, Silva DMZDA, da Silva LRR, do Nascimento CN, Oliveira C, Foresti F. Karyotype description and comparative chromosomal mapping of rDNA and U2 snDNA sequences in Eigenmannialimbata and E.microstoma (Teleostei, Gymnotiformes, Sternopygidae). COMPARATIVE CYTOGENETICS 2022; 16:127-142. [PMID: 36761809 PMCID: PMC9849054 DOI: 10.3897/compcytogen.v16i2.72190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 04/09/2022] [Indexed: 06/18/2023]
Abstract
The genus Eigenmannia Jordan et Evermann,1896 includes electric fishes endemic to the Neotropical region with extensive karyotype variability and occurrence of different sex chromosome systems, however, cytogenetic studies within this group are restricted to few species. Here, we describe the karyotypes of Eigenmannialimbata (Schreiner et Miranda Ribeiro, 1903) and E.microstoma (Reinhardt, 1852) and the chromosomal locations of 5S and 18S rDNAs (ribosomal RNA genes) and U2 snDNA (small nuclear RNA gene). Among them, 18S rDNA sites were situated in only one chromosomal pair in both species, and co-localized with 5S rDNA in E.microstoma. On the other hand, 5S rDNA and U2 snRNA sites were observed on several chromosomes, with variation in the number of sites between species under study. These two repetitive DNAs were observed co-localized in one chromosomal pair in E.limbata and in four pairs in E.microstoma. Our study shows a new case of association of these two types of repetitive DNA in the genome of Gymnotiformes.
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Affiliation(s)
- Cristian Andrés Araya-Jaime
- Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena, La Serena, Chile
| | | | | | | | - Claudio Oliveira
- Departamento de Biología, Universidad de La Serena, La Serena, Chile
| | - Fausto Foresti
- Departamento de Biología, Universidad de La Serena, La Serena, Chile
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Classical and molecular cytogenetics of Markiana nigripinnis (Pisces - Characiformes) from brazilian Pantanal: a comparative analysis with cytotaxonomic contributions. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01091-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Soares LB, Paim FG, Ramos LP, Foresti F, Oliveira C. Molecular cytogenetic analysis and the establishment of a cell culture in the fish species Hollandichthys multifasciatus (Eigenmann & Norris, 1900) (Characiformes, Characidae). Genet Mol Biol 2021; 44:e20200260. [PMID: 33877256 PMCID: PMC8056886 DOI: 10.1590/1678-4685-gmb-2020-0260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 02/07/2021] [Indexed: 11/22/2022] Open
Abstract
Hollandichthys is a fish genus of the family Characidae that
was until recently considered to be monotypic, with cytogenetic, morphological,
and molecular data being restricted to a few local populations. In the present
study, the karyotype of a population of Hollandichthys
multifasciatus was analyzed using classical and molecular
cytogenetic approaches for the investigation of potential markers that could
provide new perspectives on the cytotaxonomy. H. multifasciatus
presented a diploid number of 2n=50 chromosomes and a karyotype formula of
8m+10sm+32st. A single pair of chromosomes presented Ag-NORs signals, which
coincided with the 18S rDNA sites visualized by FISH, whilst the 5S rDNA
sequences were mapped in two chromosome pairs. The distribution of the U snRNA
genes was mapped on the Hollandichthys chromosomes for the
first time, with the probes revealing the presence of the U1 snDNA on the
chromosomes of pair 20, U2 on pairs 6 and 19, U4 on pair 16, and U6 on the
chromosomes of pair 11. The results of the present study indicated karyotypic
differences in comparison with the other populations of H.
multifasciatus studied previously, reinforcing the need for further
research to identify isolated populations or the potential existence of cryptic
Hollandichthys species.
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Affiliation(s)
- Letícia Batista Soares
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências, Laboratório de Biologia e Genética de Peixes, Botucatu, SP, Brazil
| | - Fabilene Gomes Paim
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências, Laboratório de Biologia e Genética de Peixes, Botucatu, SP, Brazil
| | - Lucas Peres Ramos
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências, Laboratório de Biologia e Genética de Peixes, Botucatu, SP, Brazil
| | - Fausto Foresti
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências, Laboratório de Biologia e Genética de Peixes, Botucatu, SP, Brazil
| | - Claudio Oliveira
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências, Laboratório de Biologia e Genética de Peixes, Botucatu, SP, Brazil
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Araya-Jaime C, Palma-Rojas C, Brand EV, Silva A. Cytogenetic characterization, rDNA mapping and quantification of the nuclear DNA content in Seriolella violacea Guichenot, 1848 (Perciformes, Centrolophidae). COMPARATIVE CYTOGENETICS 2020; 14:319-328. [PMID: 32754305 PMCID: PMC7381430 DOI: 10.3897/compcytogen.v14i3.53087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 06/05/2020] [Indexed: 05/27/2023]
Abstract
Seriolella violacea Guichenot, 1848 is an important component of the fish fauna of the Chilean coast and is of great economic interest. Cytogenetic information for the family Centrolophidae is lacking and the genomic size of five of the twenty-eight species described for this family are is barely known. This study aimed to describe for the first time the karyotype structure via classical and molecular cytogenetics analysis with the goal of identifying the constitutive heterochromatin distribution, chromosome organization of rDNA sequences and quantification of nuclear DNA content. The karyotype of S. violacea is composed of 48 chromosomes, with the presence of conspicuous blocks of heterochromatin on chromosomal pairs one and two. FISH assay with a 5S rDNA probe, revealed the presence of fluorescent markings on the heterochromatic block of pair one. The 18S rDNA sites are located exclusively on pair two, characterizing this pair as the carrier of the NOR. Finally, the genomic size of S. violacea was estimated at 0.59 pg of DNA as C-value. This work represents the first effort to document the karyotype structure and physical organization of the rDNA sequences in the Seriolella genome, contributing with new information to improve our understanding of chromosomal evolution and genomic organization in marine perciforms.
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Affiliation(s)
- Cristian Araya-Jaime
- Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena, Casilla 554, La Serena, ChileUniversidad de La SerenaLa SerenaChile
- Laboratorio de Genética y Citogenética Vegetal, Departamento de Biología, Universidad de La Serena. La Serena, ChileUniversidad Católica del Norte Sede CoquimboCoquimboChile
| | - Claudio Palma-Rojas
- Laboratorio de Genética y Citogenética Vegetal, Departamento de Biología, Universidad de La Serena. La Serena, ChileUniversidad Católica del Norte Sede CoquimboCoquimboChile
| | - Elisabeth Von Brand
- Departamento de Biología Marina Facultad de Ciencias del Mar, Universidad Católica del Norte Sede Coquimbo, Casilla 117, Coquimbo, ChileUniversidad de La SerenaLa SerenaChile
| | - Alfonso Silva
- Laboratorio Cultivo de Peces, Facultad de Ciencias del Mar, Universidad Católica del Norte Sede Coquimbo, Casilla 117, Coquimbo, ChileUniversidad Católica del Norte Sede CoquimboCoquimboChile
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Prestes AB, Nardelli A, Paiz LM, Gavazzoni M, Margarido VP. Cytogenetic markers as tools in delimiting species of the highly diverse Neotropical fish Bryconamericus (Characiformes: Characidae). NEOTROPICAL ICHTHYOLOGY 2019. [DOI: 10.1590/1982-0224-20190057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT Bryconamericus is a highly diverse group of characid fishes, being cytogenetic a valuable tool for the delimitation of species. Bryconamericus aff. iheringii (Upper Uruguay/Lower Paraná), B. coeruleus (Upper Paraná), B. cf. ecai e B. cf. eigenmanni (Upper Uruguay) were studied cytogenetically, and presented 2n=52 chromosomes, with interpopulational/interspecific variation of karyotype and fundamental number. Heterochromatin was evidenced in pericentromeric, telomeric and interstitial regions, and it was shown to be an important cytogenetic marker. Single nucleolar organizing regions (NORs) were found in B. cf. eigenmanni, B. cf. ecai and B. aff. iheringii (Lower Paraná), and multiple in B. aff. iheringii (Upper Uruguay) and B. coeruleus, with occurrence of two patterns for the first species, and three for the second. The 5S/18S rDNA-FISH confirmed the location of the NORs and showed single 5S rDNA cistrons only in B. aff. iheringii (Lower Paraná), evidencing the dispersion of both genes, often co-located, in the karyotype of the others species. The data of this work contribute for the delimitation of the species of the genus. Co-localization of ribosomal genes may represent a plesiomorphic condition for the group, and their dispersion suggest the occurrence of duplication, pseudogeneization and transposition events mediated by mobile genetic elements.
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Usso MC, Santos ARD, Gouveia JG, Frantine-Silva W, Araya-Jaime C, Oliveira MLMD, Foresti F, Giuliano-Caetano L, Dias AL. Genetic and Chromosomal Differentiation of Rhamdia quelen (Siluriformes, Heptapteridae) Revealed by Repetitive Molecular Markers and DNA Barcoding. Zebrafish 2018; 16:87-97. [PMID: 30227086 DOI: 10.1089/zeb.2018.1576] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Rhamdia quelen, a species of Heptapteridae, is considered to be a complex because of taxonomic and phylogenetic inconsistencies. Determining the physical location of repetitive DNA sequences on the chromosomes and the DNA barcode might increase our understanding of these inconsistencies within different groups of fish. To this end, we analyzed R. quelen populations from two river basins in Brazil, Paraguay and Parana, using DNA barcoding and different chromosomal markers, including U2 snDNA, which has never been analyzed for any Rhamdia species. Cytochrome c oxidase I gene sequence analysis revealed a significant differentiation among populations from the Miranda and Quexada rivers, with genetic distances compatible to those found among different species in neotropical fishes. Our results, in general, revealed a conservative chromosomal evolution in R. quelen and a differential distribution of some markers, such as 5S rDNA and U2 snDNA, in different populations. We suggest that R. quelen must undergo a major revision in its morphological, genetic, and cytogenetic molecular and taxonomic structure to elucidate possible operational taxonomic units.
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Affiliation(s)
- Mariana Campaner Usso
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
| | - Angélica Rossotti Dos Santos
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
| | - Juceli Gonzalez Gouveia
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
| | - Wilson Frantine-Silva
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
| | - Cristian Araya-Jaime
- 2 Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, Brazil
| | | | - Fausto Foresti
- 2 Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, Brazil
| | - Lucia Giuliano-Caetano
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
| | - Ana Lúcia Dias
- 1 Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, Londrina, Brazil
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Piscor D, Fernandes CA, Parise-Maltempi PP. Conserved number of U2 snDNA sites in Piabina argentea, Piabarchus stramineus and two Bryconamericus species (Characidae, Stevardiinae). NEOTROPICAL ICHTHYOLOGY 2018. [DOI: 10.1590/1982-0224-20170066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT The chromosomal location of 5S rRNA and U2 snRNA genes of Piabina argentea, Piabarchus stramineus and two Bryconamericus species from two different Brazilian river basins were investigated, in order to contribute to the understanding of evolutionary characteristics of these repetitive DNAs in the subfamily Stevardiinae. The diploid chromosome number was 2n = 52 for Bryconamericus cf. iheringii, Bryconamericus turiuba, Piabarchus stramineus and Piabina argentea. The 5S rDNA clusters were located on one chromosome pair in P. stramineus and B. cf. iheringii, and on two pairs in B. turiuba and P. argentea. The U2 snDNA clusters were located on the one pair in all species. Two-color FISH experiments showed that the co-localization between 5S rDNA and U2 snDNA in P. stramineus can represent a marker for this species. Thus, the present study demonstrated that the number of U2 snDNA clusters observed for the four species was conserved, but particular characteristics can be found in the genome of each species.
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Affiliation(s)
- Diovani Piscor
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brazil
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Araya-Jaime C, Mateussi NTB, Utsunomia R, Costa-Silva GJ, Oliveira C, Foresti F. ZZ/Z0: The New System of Sex Chromosomes in Eigenmannia aff. trilineata (Teleostei: Gymnotiformes: Sternopygidae) Characterized by Molecular Cytogenetics and DNA Barcoding. Zebrafish 2017; 14:464-470. [DOI: 10.1089/zeb.2017.1422] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
- Cristian Araya-Jaime
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Nadayca T. Bonani Mateussi
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Ricardo Utsunomia
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Guilherme J. Costa-Silva
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Claudio Oliveira
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Fausto Foresti
- Department of Morphology, Institute of Bioscience, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
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