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de Menezes Cavalcante Sassi F, Sember A, Deon GA, Liehr T, Padutsch N, Oyakawa OT, Vicari MR, Bertollo LAC, Moreira-Filho O, de Bello Cioffi M. Homeology of sex chromosomes in Amazonian Harttia armored catfishes supports the X-fission hypothesis for the X 1X 2Y sex chromosome system origin. Sci Rep 2023; 13:15756. [PMID: 37735233 PMCID: PMC10514344 DOI: 10.1038/s41598-023-42617-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
The Neotropical monophyletic catfish genus Harttia represents an excellent model to study karyotype and sex chromosome evolution in teleosts. Its species split into three phylogenetic clades distributed along the Brazilian territory and they differ widely in karyotype traits, including the presence of standard or multiple sex chromosome systems in some members. Here, we investigate the chromosomal rearrangements and associated synteny blocks involved in the origin of a multiple X1X2Y sex chromosome system present in three out of six sampled Amazonian-clade species. Using 5S and 18S ribosomal DNA fluorescence in situ hybridization and whole chromosome painting with probes corresponding to X1 and X2 chromosomes of X1X2Y system from H. punctata, we confirm previous assumptions that X1X2Y sex chromosome systems of H. punctata, H. duriventris and H. villasboas represent the same linkage groups which also form the putative XY sex chromosomes of H. rondoni. The shared homeology between X1X2Y sex chromosomes suggests they might have originated once in the common ancestor of these closely related species. A joint arrangement of mapped H. punctata X1 and X2 sex chromosomes in early diverging species of different Harttia clades suggests that the X1X2Y sex chromosome system may have formed through an X chromosome fission rather than previously proposed Y-autosome fusion.
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Affiliation(s)
| | - Alexandr Sember
- Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská, 89, Liběchov, Czech Republic
| | - Geize Aparecida Deon
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Thomas Liehr
- Institut für Humangenetik, Universitätsklinikum Jena, 07747, Jena, Germany.
| | - Niklas Padutsch
- Institut für Humangenetik, Universitätsklinikum Jena, 07747, Jena, Germany
| | | | - Marcelo Ricardo Vicari
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Luiz Antonio Carlos Bertollo
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Orlando Moreira-Filho
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Marcelo de Bello Cioffi
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, 13565-905, Brazil
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Sassi FDMC, Deon GA, Sember A, Liehr T, Oyakawa OT, Moreira Filho O, Bertollo LAC, Vicari MR, Cioffi MDB. Turnover of multiple sex chromosomes in Harttia catfish (Siluriformes, Loricariidae): a glimpse from whole chromosome painting. Front Genet 2023; 14:1226222. [PMID: 37576550 PMCID: PMC10421700 DOI: 10.3389/fgene.2023.1226222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 07/17/2023] [Indexed: 08/15/2023] Open
Abstract
The remarkable fish biodiversity encompasses also great sex chromosome variability. Harttia catfish belong to Neotropical models for karyotype and sex chromosome research. Some species possess one of the three male-heterogametic sex chromosome systems, XY, X1X2Y or XY1Y2, while other members of the genus have yet uncharacterized modes of sex determination. Particularly the XY1Y2 multiple sex chromosome system shows a relatively low incidence among vertebrates, and it has not been yet thoroughly investigated. Previous research suggested two independent X-autosome fusions in Harttia which led to the emergence of XY1Y2 sex chromosome system in three of its species. In this study, we investigated evolutionary trajectories of synteny blocks involved in this XY1Y2 system by probing six Harttia species with whole chromosome painting (WCP) probes derived from the X (HCA-X) and the chromosome 9 (HCA-9) of H. carvalhoi. We found that both painting probes hybridize to two distinct chromosome pairs in Amazonian species, whereas the HCA-9 probe paints three chromosome pairs in H. guianensis, endemic to Guyanese drainages. These findings demonstrate distinct evolutionary fates of mapped synteny blocks and thereby elevated karyotype dynamics in Harttia among the three evolutionary clades.
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Affiliation(s)
| | - Geize Aparecida Deon
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Alexandr Sember
- Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czechia
| | - Thomas Liehr
- Institut für Humangenetik, Universitätsklinikum Jena, Jena, Germany
| | | | - Orlando Moreira Filho
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Luiz Antonio Carlos Bertollo
- Laboratório de Citogenética de Peixes, 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
| | - Marcelo de Bello Cioffi
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
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Glugoski L, Deon GA, Nogaroto V, Moreira-Filho O, Vicari MR. Robertsonian Fusion Site in Rineloricaria pentamaculata (Siluriformes: Loricariidae): Involvement of 5S Ribosomal DNA and Satellite Sequences. Cytogenet Genome Res 2023; 162:657-664. [PMID: 37054691 DOI: 10.1159/000530636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 04/07/2023] [Indexed: 04/15/2023] Open
Abstract
Cytogenetic studies demonstrated that unstable chromosomal sites in armored catfishes (Loricariidae) triggered intense karyotypic diversification, mainly derived from Robertsonian rearrangements. In Loricariinae, the presence of ribosomal DNA (rDNA) clusters and their flanking repeated regions (such as microsatellites or partial transposable element sequences) was proposed to facilitate chromosomal rearrangements. Hence, this study aimed to characterize the numerical chromosomal polymorphism observed in Rineloricaria pentamaculata and evaluate the chromosomal rearrangements which originated diploid chromosome number (2n) variation, from 56 to 54. Our data indicate a centric fusion event between acrocentric chromosomes of pairs 15 and 18, bearing 5S rDNA sites on their short (p) arms. This chromosome fusion established the numerical polymorphism, decreasing the 2n from original 56 (karyomorph A) to 55 in karyomorph B and 54 in karyomorph C. Although vestiges of telomeric sequences were evidenced at the fusion point, no 5S rDNA was detected in this region. The acrocentric chromosomes involved in the origin of the fusion were enriched with (CA)n and (GA)n microsatellites. Repetitive sequences in the acrocentric chromosomes subtelomeres have facilitated the rearrangement. Our study thus reinforces the view on the important role of particular repetitive DNA classes in promoting chromosome fusions which frequently drive Rineloricaria karyotype evolution.
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Affiliation(s)
- Larissa Glugoski
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, Brazil
| | - Geize A Deon
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, Brazil
| | - Viviane Nogaroto
- Department of Structural Biology, Molecular and Genetics, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - Orlando Moreira-Filho
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, Brazil
| | - Marcelo Ricardo Vicari
- Department of Structural Biology, Molecular and Genetics, State University of Ponta Grossa, Ponta Grossa, Brazil
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Marajó L, Viana PF, Ferreira AMV, Py-Daniel LHR, Cioffi MDB, Sember A, Feldberg E. Chromosomal rearrangements and the first indication of an ♀X 1 X 1 X 2 X 2 /♂X 1 X 2 Y sex chromosome system in Rineloricaria fishes (Teleostei: Siluriformes). J Fish Biol 2023; 102:443-454. [PMID: 36427042 DOI: 10.1111/jfb.15275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Rineloricaria is the most diverse genus within the freshwater fish subfamily Loricariinae, and it is widely distributed in the Neotropical region. Despite limited cytogenetic data, records from southern and south-eastern Brazil suggest a high rate of chromosomal rearrangements in this genus, mirrored in remarkable inter- and intraspecific karyotype variability. In the present work, we investigated the karyotype features of Rineloricaria teffeana, an endemic representative from northern Brazil, using both conventional and molecular cytogenetic techniques. We revealed different diploid chromosome numbers (2n) between sexes (33♂/34♀), which suggests the presence of an ♀X1 X1 X2 X2 /♂X1 X2 Y multiple sex chromosome system. The male-limited Y chromosome was the largest and the only biarmed element in the karyotype, implying Y-autosome fusion as the most probable mechanism behind its origination. C-banding revealed low amounts of constitutive heterochromatin, mostly confined to the (peri)centromeric regions of most chromosomes (including the X2 and the Y) but also occupying the distal regions of a few chromosomal pairs. The chromosomal localization of the 18S ribosomal DNA (rDNA) clusters revealed a single site on chromosome pair 4, which was adjacent to the 5S rDNA cluster. Additional 5S rDNA loci were present on the autosome pair 8, X1 chromosome, and in the presumed fusion point on the Y chromosome. The probe for telomeric repeat motif (TTAGGG)n revealed signals of variable intensities at the ends of all chromosomes except for the Y chromosome, where no detectable signals were evidenced. Male-to-female comparative genomic hybridization revealed no sex-specific or sex-biased repetitive DNA accumulations, suggesting a presumably low level of neo-Y chromosome differentiation. We provide evidence that rDNA sites might have played a role in the formation of this putative multiple sex chromosome system and that chromosome fusions originate through different mechanisms among different Rineloricaria species.
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Affiliation(s)
- Leandro Marajó
- Laboratório de Genética Animal, Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Patrik Ferreira Viana
- Laboratório de Genética Animal, Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Alex Matheus Viana Ferreira
- Laboratório de Genética Animal, Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Lúcia Helena Rapp Py-Daniel
- Coleção de Peixes, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Marcelo de Bello Cioffi
- Laboratório de Citogenética de Peixes, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Alexandr Sember
- Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Libechov, Czech Republic
| | - Eliana Feldberg
- Laboratório de Genética Animal, Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
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Glugoski L, Nogaroto V, Deon GA, Azambuja M, Moreira-Filho O, Vicari MR. Enriched tandemly repeats in chromosomal fusion points of Rineloricaria latirostris (Boulenger, 1900) (Siluriformes: Loricariidae). Genome 2022; 65:479-489. [PMID: 35939838 DOI: 10.1139/gen-2022-0043] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cytogenetic data showed the enrichment of repetitive DNAs in chromosomal rearrangement points between closely related species in armored catfishes. Still, few studies integrated cytogenetic and genomic data aiming to identify their prone-to-break DNA sites. Here, we aimed to obtain the repetitive fraction in Rineloricaria latirostris to recognize the microsatellite and homopolymers flanking the regions previously described as chromosomal fusion points. The results indicated that repetitive DNAs in R. latirostris are predominantly DNA transposons, and considering the microsatellite and homopolymers, A/T-rich expansions were the most abundant. The in situ localization demonstrated the A/T-rich repetitive sequences are scattered on the chromosomes, while A/G-rich microsatellites units were accumulated in some regions. The DNA transposon hAT, the 5S rDNA, and 45S rDNA (previously identified in Robertsonian fusion points in R. latirostris) are clusterized with some microsatellites, especially (CA)n, (GA)n, and poly-A, which also are enriched in regions of chromosomal fusions. Our findings demonstrated that repetitive sequences such as rDNAs, hAT transposon, and microsatellite units flank probable evolutionary breakpoint regions in R. latirostris. However, due to the sequence unit homologies in different chromosomal sites, these repeat DNAs only may have facilitated chromosome fusion events in R. latirostris rather than work as a double-strand breakpoint site.
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Affiliation(s)
- Larissa Glugoski
- Universidade Federal de São Carlos, Departamento de Genética e Evolução, Sao Carlos, São Paulo, Brazil;
| | - Viviane Nogaroto
- Universidade Estadual de Ponta Grossa, Departamento de Biologia Estrutural, Molecular e Genética, Ponta Grossa, Paraná, Brazil;
| | - Geize Aparecida Deon
- Universidade Federal de São Carlos, Departamento de Genética e Evolução, Sao Carlos, São Paulo, Brazil;
| | - Matheus Azambuja
- Universidade Federal do Paraná, Departamento de Genética, Curitiba, PR, Brazil;
| | - Orlando Moreira-Filho
- Universidade Federal de São Carlos, Departamento de Genética e Evolução, Sao Carlos, São Paulo, Brazil;
| | - Marcelo Ricardo Vicari
- Universidade Estadual de Ponta Grossa, Departamento de Biologia Estrutural, Molecular e Genética, Ponta Grossa, Paraná, Brazil.,Universidade Federal do Paraná, Departamento de Genética, Curitiba, PR, Brazil;
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Azambuja M, Orane Schemberger M, Nogaroto V, Moreira-Filho O, Martins C, Ricardo Vicari M. Major and minor U small nuclear RNAs genes characterization in a neotropical fish genome: Chromosomal remodeling and repeat units dispersion in Parodontidae. Gene 2022; 826:146459. [PMID: 35358649 DOI: 10.1016/j.gene.2022.146459] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 01/15/2022] [Accepted: 03/25/2022] [Indexed: 11/29/2022]
Abstract
In association with many proteins, small nuclear RNAs (snRNAs) organize the spliceosomes that play a significant role in processing precursor mRNAs during gene expression. According to snRNAs genic arrangements, two kinds of spliceosomes (major and minor) can be organized into eukaryotic cells. Although in situ localization of U1 and U2 snDNAs have been performed in fish karyotypes, studies with genomic characterization and functionality of U snRNAs integrated into chromosomal changes on Teleostei are still scarce. This study aimed to achieve a genomic characterization of the U snRNAs genes in Apareiodon sp. (2n = 54, ZZ/ZW), apply these data to recognize functional/defective copies, and map chromosomal changes involving snDNAs in Parodontidae species karyotype diversification. Nine snRNA multigene families (U1, U2, U4, U5, U6, U11, U12, U4atac and U6atac) arranged in putatively functional copies in the genome were analyzed. Proximal Sequence Elements (PSE) and TATA-box promoters occurrence, besides an entire transcribed region and conserved secondary structures, qualify them for spliceosome activity. In addition, several defective copies or pseudogenes were identified for the snRNAs that make up the major spliceosome. In situ localization of snDNAs in five species of Parodontidae demonstrated that U1, U2, and U4 snDNAs were involved in chromosomal location changes or units dispersion. The U snRNAs defective/pseudogenes units dispersion could be favored by the probable occurrence of active retrotransposition enzymes in the Apareiodon genome. The U2 and U4 snDNAs sites were involved in independent events in the differentiation of sex chromosomes among Parodontidae lineages. The study characterized U snRNA genes that compose major and minor spliceosomes in the Apareiodon sp. genome and proposes that their defective copies trigger chromosome differentiation and diversification events in Parodontidae.
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Affiliation(s)
- Matheus Azambuja
- Programa de Pós-Graduação em Genética, Universidade Federal do Paraná, Centro Politécnico, Avenida Coronel Francisco H. dos Santos, 100, 81531-990 Curitiba, Paraná, Brazil.
| | - Michelle Orane Schemberger
- Programa de Pós-Graduação em Genética, Universidade Federal do Paraná, Centro Politécnico, Avenida Coronel Francisco H. dos Santos, 100, 81531-990 Curitiba, Paraná, Brazil.
| | - Viviane Nogaroto
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil.
| | - Orlando Moreira-Filho
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, Km 235, 13565-905 São Carlos, São Paulo, Brazil.
| | - Cesar Martins
- Departamento de Morfologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista, Distrito de Rubião Júnior, s/n, 18618-689 Botucatu, São Paulo, Brazil.
| | - Marcelo Ricardo Vicari
- Programa de Pós-Graduação em Genética, Universidade Federal do Paraná, Centro Politécnico, Avenida Coronel Francisco H. dos Santos, 100, 81531-990 Curitiba, Paraná, Brazil; Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil.
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Takagui FH, Viana P, Baumgärtner L, Bitencourt JA, Margarido VP, Lui RL, Feldberg E, Birindelli JLO, Almeida FS, Giuliano-Caetano L. Reconstruction of the Doradinae (Siluriformes-Doradidae) ancestral diploid number and NOR pattern reveals new insights about the karyotypic diversification of the Neotropical thorny catfishes. Genet Mol Biol 2021; 44:e20200068. [PMID: 34821336 PMCID: PMC8612126 DOI: 10.1590/1678-4685-gmb-2020-0068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 04/04/2021] [Indexed: 11/23/2022] Open
Abstract
Doradinae (Siluriformes: Doradidae) is the most species-rich subfamily among
thorny catfishes, encompassing over 77 valid species, found mainly in Amazon and
Platina hydrographic basins. Here, we analyzed seven Doradinae species using
combined methods (e.g., cytogenetic tools and Mesquite ancestral reconstruction
software) in order to scrutinize the processes that mediated the karyotype
diversification in this subfamily. Our ancestral reconstruction recovered that
2n=58 chromosomes and simple nucleolar organizer regions (NOR) are ancestral
features only for Wertheimerinae and the most clades of Doradinae. Some
exceptions were found in Trachydoras paraguayensis (2n=56),
Trachydoras steindachneri (2n=60), Ossancora
punctata (2n=66) and Platydoras hancockii whose
karyotypes showed a multiple NOR system. The large thorny catfishes, such as
Pterodoras granulosus, Oxydoras niger and
Centrodoras brachiatus share several karyotype features,
with subtle variations only regarding their heterochromatin distribution. On the
other hand, a remarkable karyotypic variability has been reported in the
fimbriate barbells thorny catfishes. These two contrasting karyoevolution
trajectories emerged from a complex interaction between chromosome
rearrangements (e.g., inversions and Robertsonian translocations) and mechanisms
of heterochromatin dispersion. Moreover, we believe that biological features,
such as microhabitats preferences, populational size, low vagility and migratory
behavior played a key role during the origin and maintenance of chromosome
diversity in Doradinae subfamily.
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Affiliation(s)
- Fábio H Takagui
- Universidade Estadual de Londrina, Departamento de Biologia Geral, Laboratório de Citogenética Animal, Londrina, PR, Brazil
| | - Patrik Viana
- Instituto Nacional de Pesquisas da Amazônia, Laboratório de Genética Animal, Manaus, AM, Brazil
| | - Lucas Baumgärtner
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, Laboratório de Citogenética, Cascavel, PR, Brazil
| | - Jamille A Bitencourt
- Universidade Estadual do Sudoeste da Bahia, Departamento de Ciências Biológicas, Laboratório de Citogenética, Jequié, BA, Brazil
| | - Vladimir Pavan Margarido
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, Laboratório de Citogenética, Cascavel, PR, Brazil
| | - Roberto Laridondo Lui
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, Laboratório de Citogenética, Cascavel, PR, Brazil
| | - Eliana Feldberg
- Instituto Nacional de Pesquisas da Amazônia, Laboratório de Genética Animal, Manaus, AM, Brazil
| | - Jose Luis Olivan Birindelli
- Universidade Estadual de Londrina, Departamento de Biologia Animal e Vegetal, Museu de Zoologia, Londrina, PR, Brazil
| | - Fernanda Simões Almeida
- Universidade Estadual de Londrina, Departamento de Biologia Geral, Laboratório de Genética e Ecologia Animal, Londrina, PR, Brazil
| | - Lucia Giuliano-Caetano
- Universidade Estadual de Londrina, Departamento de Biologia Geral, Laboratório de Citogenética Animal, Londrina, PR, Brazil
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Sassi FMC, Moreira-Filho O, Deon GA, Sember A, Bertollo LAC, Liehr T, Oliveira VCS, Viana PF, Feldberg E, Vicari MR, Cioffi MB. Adding New Pieces to the Puzzle of Karyotype Evolution in Harttia (Siluriformes, Loricariidae): Investigation of Amazonian Species. Biology (Basel) 2021; 10:922. [PMID: 34571799 DOI: 10.3390/biology10090922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 12/21/2022]
Abstract
A remarkable morphological diversity and karyotype variability can be observed in the Neotropical armored catfish genus Harttia. These fishes offer a useful model to explore both the evolution of karyotypes and sex chromosomes, since many species possess male-heterogametic sex chromosome systems and a high rate of karyotype repatterning. Based on the karyotype organization, the chromosomal distribution of several repetitive DNA classes, and the rough estimates of genomic divergences at the intraspecific and interspecific levels via Comparative Genomic Hybridization, we identified shared diploid chromosome numbers (2n = 54) but different karyotype compositions in H. dissidens (20m + 26sm + 8a) and Harttia sp. 3 (16m + 18sm + 14st + 6a), and different 2n in H. guianensis (2n = 58; 20m + 26sm + 2st + 10a). All species further displayed similar patterns of chromosomal distribution concerning constitutive heterochromatin, 18S ribosomal DNA (rDNA) sites, and most of the surveyed microsatellite motifs. Furthermore, differences in the distribution of 5S rDNA sites and a subset of microsatellite sequences were identified. Heteromorphic sex chromosomes were lacking in H. dissidens and H. guianensis at the scale of our analysis. However, one single chromosome pair in Harttia sp. 3 males presented a remarkable accumulation of male genome-derived probe after CGH, pointing to a tentative region of early sex chromosome differentiation. Thus, our data support already previously outlined evidence that Harttia is a vital model for the investigation of teleost karyotype and sex chromosome dynamics.
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Venturelli NB, Takagui FH, Pompeo LRS, Rodriguez MS, da Rosa R, Giuliano-Caetano L. Cytogenetic markers to understand chromosome diversification and conflicting taxonomic issues in Rineloricaria (Loricariidae: Loricariinae) from Rio Grande do Sul coastal drainages. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00748-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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