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Dos Santos GE, Crepaldi C, da Silva MJ, Parise-Maltempi PP. Revealing the Satellite DNA Content in Ancistrus sp. (Siluriformes: Loricariidae) by Genomic and Bioinformatic Analysis. Cytogenet Genome Res 2024:1-8. [PMID: 38631304 DOI: 10.1159/000538926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 04/12/2024] [Indexed: 04/19/2024] Open
Abstract
INTRODUCTION Eukaryotic genomes are composed of simple, repetitive sequences, including satellite DNAs (satDNA), which are noncoding sequences arranged in tandem arrays. These sequences play a crucial role in genomic functions and innovations, influencing processes such as the maintenance of nuclear material, the formation of heterochromatin and the differentiation of sex chromosomes. In this genomic era, advances in next-generation sequencing and bioinformatics tools have facilitated the exhaustive cataloging of repetitive elements in genomes, particularly in non-model species. This study focuses on the satDNA content of Ancistrus sp., a diverse species of fish from the Loricariidae family. The genus Ancistrus shows significant karyotypic evolution, with extensive variability from the ancestral diploid number. METHODS By means of bioinformatic approaches, 40 satDNA families in Ancistrus sp., constituting 5.19% of the genome were identified. Analysis of the abundance and divergence landscape revealed diverse profiles, indicating recent amplification and homogenization of these satDNA sequences. RESULTS The most abundant satellite, AnSat1-142, constitutes 2.1% of the genome, while the least abundant, AnSat40-52, represents 0.0034%. The length of the monomer repeat varies from 16 to 142 base pairs, with an average length of 61 bp. These results contribute to understanding the genomic dynamics and evolution of satDNAs in Ancistrus sp. CONCLUSION The study underscores the variability of satDNAs between fish species and provides valuable information on chromosome organization and the evolution of repetitive elements in non-model organisms.
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Affiliation(s)
- Gabriel Esbrisse Dos Santos
- General and Applied Biology Department, Bioscience Institute/São Paulo State University (UNESP), Rio Claro, Brazil
| | - Carolina Crepaldi
- General and Applied Biology Department, Bioscience Institute/São Paulo State University (UNESP), Rio Claro, Brazil
| | - Marcelo João da Silva
- General and Applied Biology Department, Bioscience Institute/São Paulo State University (UNESP), Rio Claro, Brazil
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Nirchio Tursellino M, de Bello Cioffi M, de Menezes Cavalcante Sassi F, Deon GA, Oliveira C, Kuranaka M, Valdiviezo-Rivera J, Gonzalez VH, Rossi AR. Integrating Genomic and Chromosomal Data: A Cytogenetic Study of Transancistrus santarosensis (Loricariidae: Hypostominae) with Characterization of a ZZ/ZW Sex Chromosome System. Genes (Basel) 2023; 14:1662. [PMID: 37761802 PMCID: PMC10531053 DOI: 10.3390/genes14091662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 09/29/2023] Open
Abstract
The plecos (Loricariidae) fish represent a great model for cytogenetic investigations due to their variety of karyotypes, including diploid and polyploid genomes, and different types of sex chromosomes. In this study we investigate Transancistrus santarosensis a rare loricariid endemic to Ecuador, integrating cytogenetic methods with specimens' molecular identification by mtDNA, to describe the the species karyotype. We aim to verify whether sex chromosomes are cytologically identifiable and if they are associated with the accumulation of repetitive sequences present in other species of the family. The analysis of the karyotype (2n = 54 chromosomes) excludes recent centric fusion and pericentromeric inversion and suggests the presence of a ZZ/ZW sex chromosome system at an early stage of differentiation: the W chromosome is degenerated but is not characterized by the presence of differential sex-specific repetitive DNAs. Data indicate that although T. santarosensis has retained the ancestral diploid number of Loricariidae, it accumulated heterochromatin and shows non-syntenic ribosomal genes localization, chromosomal traits considered apomorphic in the family.
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Affiliation(s)
- Mauro Nirchio Tursellino
- Departamento de Acuicultura, Universidad Técnica de Machala, Av. Panamericana km 5.5, Vía Pasaje, Machala 070150, El Oro, Ecuador;
| | - Marcelo de Bello Cioffi
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-090, SP, Brazil; (M.d.B.C.); (F.d.M.C.S.); (G.A.D.)
| | | | - Geize Aparecida Deon
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-090, SP, Brazil; (M.d.B.C.); (F.d.M.C.S.); (G.A.D.)
| | - Claudio Oliveira
- Departamento de Biologia Estrutural e Funcional, Instituto de Biociências Universidade Estadual Paulista-UNESP, Botucatu 18618-689, SP, Brazil; (C.O.); (M.K.)
| | - Mariana Kuranaka
- Departamento de Biologia Estrutural e Funcional, Instituto de Biociências Universidade Estadual Paulista-UNESP, Botucatu 18618-689, SP, Brazil; (C.O.); (M.K.)
| | - Jonathan Valdiviezo-Rivera
- Instituto Nacional de Biodiversidad, Rumipamba No. 341 y Av. Shyris, Parque La Carolina, Quito 170135, Pichincha, Ecuador;
| | - Víctor Hugo Gonzalez
- Departamento de Acuicultura, Universidad Técnica de Machala, Av. Panamericana km 5.5, Vía Pasaje, Machala 070150, El Oro, Ecuador;
| | - Anna Rita Rossi
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza—Università di Roma, Via Alfonso Borelli 50, 00161 Rome, Italy;
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Occurrence of Sex Chromosomes in Fish of the Genus Ancistrus with a New Description of Multiple Sex Chromosomes in the Ecuadorian Endemic Ancistrus clementinae (Loricariidae). Genes (Basel) 2023; 14:genes14020306. [PMID: 36833233 PMCID: PMC9956960 DOI: 10.3390/genes14020306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/16/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Ancistrus Kner, 1854, is the most diverse genus among the Ancistrini (Loricariidae) with 70 valid species showing a wide geographic distribution and great taxonomic and systematic complexity. To date, about 40 Ancistrus taxa have been karyotyped, all from Brazil and Argentina, but the statistic is uncertain because 30 of these reports deal with samples that have not yet been identified at the species level. This study provides the first cytogenetic description of the bristlenose catfish, Ancistrus clementinae Rendahl, 1937, a species endemic to Ecuador, aiming to verify whether a sex chromosome system is identifiable in the species and, if so, which, and if its differentiation is associated with the presence of repetitive sequences reported for other species of the family. We associated the karyotype analysis with the COI molecular identification of the specimens. Karyotype analysis suggested the presence of a ♂ZZ/♀ZW1W2 sex chromosome system, never detected before in Ancistrus, with both W1W2 chromosomes enriched with heterochromatic blocks and 18S rDNA, in addition to GC-rich repeats (W2). No differences were observed between males and females in the distribution of 5S rDNA or telomeric repeats. Cytogenetic data here obtained confirm the huge karyotype diversity of Ancistrus, both in chromosome number and sex-determination systems.
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Glugoski L, Deon G, Schott S, Vicari MR, Nogaroto V, Moreira-Filho O. Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae). NEOTROPICAL ICHTHYOLOGY 2020. [DOI: 10.1590/1982-0224-2020-0013] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
ABSTRACT Ancistrus is a specious genus of armored catfishes that has been extensively used for cytogenetic studies in the last 17 years. A comparison of the extensive karyotypic plasticity within this genus is presented with new cytogenetic analysis for Ancistrus cf. multispinis and Ancistrus aguaboensis. This study aims to improve our understanding of chromosomal evolution associated with changes in the diploid number (2n) and the dispersion of ribosomal DNAs (rDNAs) within Ancistrus. Ancistrus cf. multispinis and A. aguaboensis exhibit 2n of 52 and 50 chromosomes, respectively. Given that A. cf. multispinis shares a 2n = 52 also found in Pterygoplichthyini, the sister group for Ancistrini, a Robertsonian (Rb) fusion event is proposed for the 2n reduction in A. aguaboensis. 5S rDNAs pseudogenes sites have already been associated with Rb fusion in Ancistrus and our analysis suggests that the 2n reduction in A. aguaboensis was triggered by double strand breaks (DSBs) and chromosomal rearrangements at 5S rDNA sites. The presence of evolutionary breakpoint regions (EBRs) into rDNA cluster is proposed to explain part of the Rb fusion in Ancistrus. Cytogenetic data presented extends the diversity already documented in Ancistrus to further understand the role of chromosomal rearrangements in the diversification of Ancistrini.
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Affiliation(s)
| | - Geize Deon
- Universidade Federal de São Carlos, Brazil
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Conde-Saldaña CC, Cunha MS, Albornoz-Garzón JG, Barreto CAV, Ibagón N, Villa-Navarro FA, Dergam JA. Karyotypic Divergence of Two Co-Occurring Species of Andean Climbing Catfishes (Siluriformes: Loricarioidei: Astroblepidae). Zebrafish 2018; 16:106-114. [PMID: 30457940 DOI: 10.1089/zeb.2018.1659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The monotypic Astroblepidae fish family includes 81 species distributed along Central and Northern Andes in South America and Panamá in Central America; most aspects regarding its biology, taxonomy, and chromosomal features remain largely unknown. This study reports the karyotype of two sympatric Astroblepus species from the Colombian Andes, aiming to provide novel information on karyotype organization and reveal possible chromosomal rearrangements occurred on these species, through mapping of different repetitive DNA classes, including microsatellites and ribosomal DNA multigene families. The results showed differences in the chromosome number and karyotypic formula: Astroblepus grixalvii had 2n = 52 (28m+8sm +12st +4a) with the metacentric pair number 1 as the largest chromosome pair, whereas Astroblepus homodon had 2n = 54 (30m+8sm +8st +8a) and less evident chromosome size differences. Microsatellite probes marked the tips of all chromosomes in both species except the short arms of acrocentric pair numbers 24 and 25 in A. homodon. Each ribosomal probe marked different chromosome pairs in both species. Microsatellite patterns suggest that the 2n increase probably involved a centric fission event that occurred during the evolutionary history of these species. This is the first karyotype description of an Astroblepus species and it contributes to the theoretical framework about the karyoevolutionary trends within Loricarioidei.
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Affiliation(s)
- Cristhian Camilo Conde-Saldaña
- 1 Departamento de Morfologia, Instituto de Biociências, UNESP-Universidade Estadual Paulista "Julio de Mesquita Filho," Botucatu, Brazil.,2 Departamento de Biologia Animal and Universidade Federal de Viçosa, Viçosa, Brazil
| | - Marina Souza Cunha
- 2 Departamento de Biologia Animal and Universidade Federal de Viçosa, Viçosa, Brazil.,3 Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Juan Gabriel Albornoz-Garzón
- 4 Colecciones Biológicas, Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Villa de Leyva, Colombia.,5 Departamento de Biología, Facultad de Ciencias, Grupo de Investigación en Zoología, Universidad del Tolima, Ibagué, Colombia
| | | | - Nicole Ibagón
- 2 Departamento de Biologia Animal and Universidade Federal de Viçosa, Viçosa, Brazil.,3 Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Francisco Antonio Villa-Navarro
- 5 Departamento de Biología, Facultad de Ciencias, Grupo de Investigación en Zoología, Universidad del Tolima, Ibagué, Colombia
| | - Jorge Abdala Dergam
- 2 Departamento de Biologia Animal and Universidade Federal de Viçosa, Viçosa, Brazil
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Bueno V, Konerat JT, Zawadzki CH, Venere PC, Blanco DR, Margarido VP. Divergent Chromosome Evolution in Hypostominae Tribes (Siluriformes: Loricariidae): Correlation of Chromosomal Data with Morphological and Molecular Phylogenies. Zebrafish 2018; 15:492-503. [DOI: 10.1089/zeb.2018.1612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Vanessa Bueno
- Coordenação do Curso de Ciências Biológicas, Universidade Tecnológica Federal do Paraná, Santa Helena, Brazil
| | - Jocicléia Thums Konerat
- Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
| | | | - Paulo Cesar Venere
- Laboratório de Citogenética e Genética Animal, Instituto de Biociências, Universidade Federal de Mato Grosso, Cuiabá, Brazil
| | - Daniel Rodrigues Blanco
- Coordenação do Curso de Ciências Biológicas, Universidade Tecnológica Federal do Paraná, Santa Helena, Brazil
| | - Vladimir Pavan Margarido
- Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
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Rocha-Reis DA, de Oliveira Brandão K, de Almeida-Toledo LF, Pazza R, Kavalco KF. The Persevering Cytotaxonomy: Discovery of a Unique XX/XY Sex Chromosome System in Catfishes Suggests the Existence of a New, Endemic and Rare Species. Cytogenet Genome Res 2018; 156:45-55. [DOI: 10.1159/000492959] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2018] [Indexed: 11/19/2022] Open
Abstract
The genus Hypostomus has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that Hypostomusancistroides represents a species complex in the Upper Paraná River basin. In this paper, an unusual karyotype of an isolated H. aff. ancistroides population was investigated. All specimens of this sample have 2n = 66 chromosomes except for 1 male with 2n = 67, most likely due to a supernumerary chromosome. In this population, the sexes are dimorphic, the males are heterogametic, and an XX/XY sex chromosome system is present. Phylogenetic analysis using mitochondrial and nuclear DNAs indicated that this population forms a monophyletic group separate from the other populations of H.ancistroides and may represent an incipient species.
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8
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Brandão KDO, Rocha-Reis DA, Garcia C, Pazza R, de Almeida-Toledo LF, Kavalco KF. Studies in two allopatric populations of Hypostomus affinis (Steindachner, 1877): the role of mapping the ribosomal genes to understand the chromosome evolution of the group. COMPARATIVE CYTOGENETICS 2018; 12:1-12. [PMID: 29362669 PMCID: PMC5770560 DOI: 10.3897/compcytogen.v12i1.22052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 12/05/2017] [Indexed: 05/15/2023]
Abstract
Several cytogenetic markers show chromosomal diversity in the fish such as "armoured catfish". Although studies have characterized many species in the major genera representing these Siluridae, particularly in the genus Hypostomus Lacépède, 1803, trends in chromosome evolution of this group remain unclear. The Paraíba do Sul river basin contains the armoured catfish Hypostomus affinis Steindachner, 1877, which is unique because of its distribution of repetitive DNAs, the 5S and 18S rDNA. Identified samples and registered collections in Brazilian museums were identified as the same typological species, while we observed wide variations in the physical location of this gene in the karyotype based on fluorescent in situ hybridization results. In this study, we propose that these species can represent evolutionarily independent units, as these fish frequently undergo processes such as dispersion and vicariance and that the rDNA is associated with DNA that spreads in the genome, such as transposons. Additionally, the absence of gene flow due to the distance of the sample location could intensify evolutionary processes. The phenotypes found for the 18S rDNA showed minor changes in relation to the number of sites between the lower and upper drainage regions of Paraíba do Sul. The large difference in the number of sites found for the 5S rDNA entered the same region (upper drainage of the basin) and the literature data could represent a population dynamics where an expansion of the 5S rDNA sites provides an extinct or non-sampled cytotype in this work.
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Affiliation(s)
- Karina de Oliveira Brandão
- Leiden University Medical Center, Department of Anatomy and Embryology, S-1-P, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Dinaíza Abadia Rocha-Reis
- Universidade Federal de Viçosa, Campus Rio Paranaíba, Institute of Biological and Health Sciences, Laboratory of Ecological and Evolutionary Genetics, BR 354 - km 310, PO Box 22, ZIP 38810-000, Rio Paranaíba, MG, Brazil
| | - Caroline Garcia
- Universidade Estadual do Sudoeste da Bahia, Campus Jequié, Department of Biological Sciences, Av. José Moreira Sobrinho s/n, Jequiezinho, ZIP 45206-190, Jequié, BA, Brazil
| | - Rubens Pazza
- Universidade Federal de Viçosa, Campus Rio Paranaíba, Institute of Biological and Health Sciences, Laboratory of Ecological and Evolutionary Genetics, BR 354 - km 310, PO Box 22, ZIP 38810-000, Rio Paranaíba, MG, Brazil
| | - Lurdes Foresti de Almeida-Toledo
- Universidade de São Paulo. Institute of Biosciences, Department of Genetics and Evolutionary Biology, Rua do Matão, 277 – Edifício André Dreyfus, Cidade Universitária, ZIP 05508090, São Paulo, SP, Brazil
| | - Karine Frehner Kavalco
- Universidade Federal de Viçosa, Campus Rio Paranaíba, Institute of Biological and Health Sciences, Laboratory of Ecological and Evolutionary Genetics, BR 354 - km 310, PO Box 22, ZIP 38810-000, Rio Paranaíba, MG, Brazil
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Lara Kamei MCDS, Baumgärtner L, Paiva S, Zawadzki CH, Martins-Santos IC, Portela-Castro ALDB. Chromosomal Diversity of Three Species of Hypostomus Lacépède, 1803 (Siluriformes, Loricariidae), from the Paraná River Basin, Brazil: A Species Complex in Hypostomus ancistroides Reinforced by a ZZ/ZW Sex Chromosome System. Zebrafish 2017; 14:357-363. [PMID: 28609254 DOI: 10.1089/zeb.2017.1429] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hypostomus shows wide morphological patterns, corroborated by great chromosomal diversity that has suggested the existence of new species, especially from small tributaries. Cytogenetic analysis has contributed to estimate a cryptic diversity providing important data for taxonomic and evolutionary studies. Cytogenetic techniques were carried out on species from a small tributary of Ivaí River, Keller River (upper Paraná River basin): Hypostomus aff. ancistroides, Hypostomus topavae, and Hypostomus aff. hermanni that presented 2n = 68, 80, and 72 chromosomes, respectively. Each species showed the same diploid number from previous descriptions for other populations but different karyotype formulas, and Hypostomus aff. ancistroides had a ZZ/ZW sex chromosome system. Multiple NORs (nucleolar organizer regions) and pericentromeric heterochromatin blocks were found in the three species. Moreover, each of them showed species-specific heterochromatins. Multiple 5S rDNA sites were detected in Hypostomus aff. ancistroides and H. topavae, whereas Hypostomus aff. hermanni had only one pair bearing these sites. In addition to the divergence in the karyotype formulas, chromosomal markers used showed karyotype differences in the three species related to other respective populations studied. Furthermore, the first description of a ZZ/ZW system for Hypostomus aff. ancistroides reinforces the hypothesis that it may correspond to a species complex and yet, confirming an unknown cryptic diversity existent in small rivers.
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Affiliation(s)
| | - Lucas Baumgärtner
- 2 Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná , Cascavel, Brazil
| | - Suzana Paiva
- 3 Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá , Maringá, Brazil
| | - Cláudio Henrique Zawadzki
- 4 Departamento de Biologia/Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá , Maringá, Brazil
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Takagui FH, Moura LFD, Ferreira DC, Centofante L, Vitorino CDA, Bueno V, Margarido VP, Venere PC. Karyotype Diversity in Doradidae (Siluriformes, Doradoidea) and Presence of the Heteromorphic ZZ/ZW Sex Chromosome System in the Family. Zebrafish 2017; 14:236-243. [PMID: 28192063 DOI: 10.1089/zeb.2016.1368] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Karyotypes and other chromosomal markers as revealed by conventional and molecular cytogenetic protocols in four species of the catfish family Doradidae from the Araguaia-Tocantins river basin, namely Hassar wilderi, Leptodoras cataniae, Tenellus leporhinus and Tenellus trimaculatus were examined. All species had diploid chromosome number 2n = 58 and karyotypes dominated by biarmed chromosomes, simple NOR phenotype, that is, one chromosome pair bearing this site in terminal position, but some differences in karyotypes and distribution of constitutive heterochromatin, position of rDNA sites. Such characteristics appeared species-specific. A ZZ/ZW sex chromosome system was found in Tenellus trimaculatus, resulting likely from the amplification of the heterochromatin, followed by a paracentric inversion. Our results confirmed low karyotype differentiation observed until now among representatives of this endemic catfish family.
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Affiliation(s)
- Fábio Hiroshi Takagui
- 1 Laboratório de Citogenética Animal, Departamento de Biologia Geral, CCB, Universidade Estadual de Londrina , Londrina, Brazil
| | - Lucas Ferreira de Moura
- 2 Laboratório de Ictiologia, Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso , Pontal do Araguaia, Brazil
| | - Daniela Cristina Ferreira
- 3 Laboratório de Citogenética e Genética Animal, Instituto de Biociências, Universidade Federal de Mato Grosso , Cuiabá, Brazil
| | - Liano Centofante
- 3 Laboratório de Citogenética e Genética Animal, Instituto de Biociências, Universidade Federal de Mato Grosso , Cuiabá, Brazil
| | - Carla de Andrade Vitorino
- 4 Programa de Pós Graduação em Ecologia e Conservação da Biodiversidade, Instituto de Biociências, Universidade Federal de Mato Grosso , Cuiabá, Brazil
| | - Vanessa Bueno
- 5 Universidade Tecnológica Federal do Paraná , Prolongamento da Rua Cerejeira s/n, Paraná, Brazil
| | - Vladimir Pavan Margarido
- 6 Laboratório de Citogenética de peixes, Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná , Paraná, Brazil
| | - Paulo Cesar Venere
- 3 Laboratório de Citogenética e Genética Animal, Instituto de Biociências, Universidade Federal de Mato Grosso , Cuiabá, Brazil .,4 Programa de Pós Graduação em Ecologia e Conservação da Biodiversidade, Instituto de Biociências, Universidade Federal de Mato Grosso , Cuiabá, Brazil
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11
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Prizon AC, Borin-Carvalho LA, Bruschi DP, Ribeiro MO, Barbosa LM, Ferreira GEDB, Cius A, Zawadzki CH, Portela-Castro ALDB. Cytogenetic data on Ancistrus sp. (Siluriformes, Loricariidae) of the Paraguay River basin (MS) sheds light on intrageneric karyotype diversification. COMPARATIVE CYTOGENETICS 2016; 10:625-636. [PMID: 28123683 PMCID: PMC5240514 DOI: 10.3897/compcytogen.v10i4.8532] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 10/17/2016] [Indexed: 06/02/2023]
Abstract
Ancistrus Kner, 1854 is a diverse catfish genus, currently comprising 66 valid species, but karyotype data were recorded for 33 species, although only ten have their taxonomic status defined. Considerable karyotype diversity has been found within this genus, with 2n varying from 34 to 54 and structural variability including heteromorphic sex chromosomes. In many cases, uncertainty on the taxonomic status of the study populations hampers reliable interpretation of the complex chromosomal evolutionary history of the group. This study aims to present the first karyotype data for a population of the Ancistrus sp. collected in Criminoso stream (tributary of the Paraguay River Basin, Mato Grosso do Sul, Brazil) in which a combination of different chromosomal markers was used and results integrated in broad discussion on karyotype evolution in the genus. The specimens presented 2n=42 with 18m+16sm+8st and a single NOR revealed by silver nitrate and fluorescence in situ hybridization (FISH) with 18S rDNA probe, located in pair No. 10. Clusters of 5S rDNA were located in the pericentromeric region of three chromosomes: pair No. 1 (metacentric) and one of the homologues of the nucleolar pair No. 10. Heterogeneity in the molecular composition of the heterochromatin was confirmed by the association of C-banding and fluorochrome CMA3/DAPI-staining. Exploring the differential composition of constitutive heterochromatin in Ancistrus may provide an important perspective to understand genome organization and evolution within this group. Our data reinforce the chromosomal diversity present in Ancistrus genus and we discuss the potential sources these variation. The karyotype structure of Ancistrus sp. "Criminoso stream" appears to be consistent with the existence of a new candidate species.
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Affiliation(s)
- Ana Camila Prizon
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Luciana Andreia Borin-Carvalho
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Daniel Pacheco Bruschi
- Departamento de Genética, Universidade Federal do Paraná, UFPR, Centro Politécnico, Jardim Botânico, 81531-980, Curitiba, Paraná, Brazil
| | - Marcos Otávio Ribeiro
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Ligia Magrinelli Barbosa
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Greicy Ellen de Brito Ferreira
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Andréa Cius
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Claudio Henrique Zawadzki
- Departamento de Biologia/ Nupélia, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Ana Luiza de Brito Portela-Castro
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, UEM, Avenida Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
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