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Gouveia JG, Moraes-Manécolo VPOD, Swarça AC, Fenocchio AS, Giuliano-Caetano L, Dias AL. Cytogenetic Trends in Two Families of the Neotropical Catfishes: Heptapteridae and Pseudopimelodidae (Siluriformes). Zebrafish 2018; 15:629-641. [PMID: 30183561 DOI: 10.1089/zeb.2018.1577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Several neotropical Siluriformes groups suffered important taxonomic revisions based on the evaluation of morphological and molecular characteristics that allow the construction of new phylogenetic hypothesis. In the present study were cytogenetically analyzed six species belonging to Heptapteridae (Cetopsorhamdia iheringi, Phenacorhamdia tenebrosa, Rhamdella eriarcha, Pimelodella meeki, Pimelodella australis, Heptapterus mustelinus) and two to Pseudopimelodidae families (Microglanis cottoides and Microglanis cibelae) by means of differential staining techniques to describe more precisely cytogenetic similarities and differences. The diploid number of R. eriarcha with 2n = 58 and M. cibelae with 2n = 56 were reported for the first time. Also, the lowest chromosome number (2n = 48) for P. tenebrosa was described. The chromosome-banding techniques for to put in evidence nucleolar organizers impregnated by silver nitrate ([AgNORs], chromomycin A3 [CMA3], and rDNA 18S) showed for all studied species conserved patterns, characteristic for each family. The rDNA 5S showed high variability among species or populations of both families, these regions could be simple or multiple, syntenic, or not with rDNA18S. The chromosome markers showed that both families are related not only from a morphologic point of view but also by their karyotypic characteristics, however, some of the present cytogenetic results evidence the importance of new morphologic, molecular, and phylogenetic studies to improve the knowledge of these fish groups.
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Affiliation(s)
- Juceli Gonzalez Gouveia
- 1 Department of General Biology and CCB (Centro de Ciências Biológicas), Universidade Estadual de Londrina , Londrina, Brazil
| | | | - Ana Claudia Swarça
- 2 Department of Histology, CCB (Centro de Ciências Biológicas), Universidade Estadual de Londrina , Londrina, Brazil
| | | | - Lucia Giuliano-Caetano
- 1 Department of General Biology and CCB (Centro de Ciências Biológicas), Universidade Estadual de Londrina , Londrina, Brazil
| | - Ana Lúcia Dias
- 1 Department of General Biology and CCB (Centro de Ciências Biológicas), Universidade Estadual de Londrina , Londrina, Brazil
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Paim FG, Almeida LADH, Affonso PRADM, Sobrinho-Scudeler PE, Oliveira C, Diniz D. Chromosomal stasis in distinct families of marine Percomorpharia from South Atlantic. COMPARATIVE CYTOGENETICS 2017; 11:299-307. [PMID: 28919966 PMCID: PMC5596989 DOI: 10.3897/compcytogen.11(2).11942] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 03/28/2017] [Indexed: 06/01/2023]
Abstract
The weakness of physical barriers in the marine environment and the dispersal potential of fish populations have been invoked as explanations of the apparent karyotype stasis of marine Percomorpha, but several taxa remain poorly studied cytogenetically. To increase the chromosomal data in this fish group, we analyzed cytogenetically three widespread Atlantic species from distinct families: Chaetodipterus faber Broussonet, 1782 (Ephippidae), Lutjanus synagris Linnaeus, 1758 (Lutjanidae) and Rypticus randalli Courtenay, 1967 (Serranidae). The three species shared a karyotype composed of 2n=48 acrocentric chromosomes, single nucleolus organizer regions (NORs) and reduced amounts of centromeric heterochromatin. A single NOR-bearing pair was identified in all species by physical mapping of 18S rDNA while non-syntenic 5S rRNA genes were located at centromeric region of a single pair. The similar karyotypic macrostructure observed in unrelated groups of Percomorpharia reinforces the conservative karyoevolution of marine teleosteans. Nonetheless, the species could be differentiated based on the pair bearing ribosomal cistrons, revealing the importance of microstructural analyses in species with symmetric and stable karyotypes.
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Affiliation(s)
- Fabilene Gomes Paim
- Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia (UESB), Jequié, Bahia, Brasil
| | | | | | | | - Claudio Oliveira
- Laboratório de Biologia e Genética de Peixes, Instituto de Biociências de Botucatu, UNESP, Botucatu, SP, Brasil
| | - Débora Diniz
- Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia (UESB), Jequié, Bahia, Brasil
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Gouveia JG, Wolf IR, de Moraes-Manécolo VPO, Bardella VB, Ferracin LM, Giuliano-Caetano L, da Rosa R, Dias AL. Isolation and characterization of 5S rDNA sequences in catfishes genome (Heptapteridae and Pseudopimelodidae): perspectives for rDNA studies in fish by C 0t method. Cytotechnology 2016; 68:2711-2720. [PMID: 27344147 PMCID: PMC5101342 DOI: 10.1007/s10616-016-9996-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 06/10/2016] [Indexed: 10/21/2022] Open
Abstract
Sequences of 5S ribosomal RNA (rRNA) are extensively used in fish cytogenomic studies, once they have a flexible organization at the chromosomal level, showing inter- and intra-specific variation in number and position in karyotypes. Sequences from the genome of Imparfinis schubarti (Heptapteridae) were isolated, aiming to understand the organization of 5S rDNA families in the fish genome. The isolation of 5S rDNA from the genome of I. schubarti was carried out by reassociation kinetics (C0t) and PCR amplification. The obtained sequences were cloned for the construction of a micro-library. The obtained clones were sequenced and hybridized in I. schubarti and Microglanis cottoides (Pseudopimelodidae) for chromosome mapping. An analysis of the sequence alignments with other fish groups was accomplished. Both methods were effective when using 5S rDNA for hybridization in I. schubarti genome. However, the C0t method enabled the use of a complete 5S rRNA gene, which was also successful in the hybridization of M. cottoides. Nevertheless, this gene was obtained only partially by PCR. The hybridization results and sequence analyses showed that intact 5S regions are more appropriate for the probe operation, due to conserved structure and motifs. This study contributes to a better understanding of the organization of multigene families in catfish's genomes.
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Affiliation(s)
- Juceli Gonzalez Gouveia
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | - Ivan Rodrigo Wolf
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | | | - Vanessa Belline Bardella
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | - Lara Munique Ferracin
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | - Lucia Giuliano-Caetano
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | - Renata da Rosa
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil
| | - Ana Lúcia Dias
- Departamento de Biologia Geral, Centro de Ciências Biológicas, CCB, Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, CEP 86051-970, Brazil.
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