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da Rocha RH, Fernandes CA, Bignotto TS, Margarido VP, Tencatt LFC, da Graça WJ, Gubiani ÉA. Integrated analysis reveals a new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) in the lower Iguassu River, Brazil. ORG DIVERS EVOL 2022. [DOI: 10.1007/s13127-021-00534-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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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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Remarkable genetic homogeneity supports a single widespread species of Hoplosternum littorale (Siluriformes, Callichthyidae) in South America. CONSERV GENET RESOUR 2017. [DOI: 10.1007/s12686-017-0831-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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da Rocha RH, Baumgärtner L, Paiz LM, Margarido VP, Fernandes CA, Gubiani ÉA. An uncommon co-localization of rDNA 5S with major rDNA clusters in Callichthyidae (Siluriformes): a report case in Corydoras carlae Nijssen & Isbrücker, 1983. COMPARATIVE CYTOGENETICS 2016; 10:603-613. [PMID: 28123681 PMCID: PMC5240512 DOI: 10.3897/compcytogen.v10i4.9507] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
Corydoras Lacepède, 1803 is the most specious genus of Corydoradinae subfamily and many of its species are still unknown in relation to molecular cytogenetic markers. However, the diploid number and karyotypic formula were recorded for many species of this group. In current study, we provided the first cytogenetic information of Corydoras carlae Nijssen & Isbrücker, 1983, an endemic fish species from Iguassu River basin, Paraná State, Brazil. The individuals were collected in Florido River, a tributary of Iguassu River and analysed with respect to diploid number, heterochromatin distribution pattern, Ag-NORs and mapping of 5S and 18S ribosomal genes. The karyotype of this species comprises 46 chromosomes arranged in 22m+22sm+2st. The heterochromatin is distributed in centromeric and pericentromeric positions in most of the chromosomes, and also associated with NORs. The Ag-NORs were detected in the terminal position on the long arm of the metacentric pair 6. The double-FISH technique showed that 5S rDNA and 18S rDNA were co-localized in the terminal portion on the long arm of the metacentric pair 6. This condition of co-localization of ribosomal genes in Corydoras carlae seems to represent a marker for this species.
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Affiliation(s)
- Rafael Henrique da Rocha
- Universidade Estadual do Oeste do Paraná, Centro de Engenharias e Ciências Exatas, 85903-000 Toledo, Paraná, Brazil
| | - Lucas Baumgärtner
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, 85819-110 Cascavel, Paraná, Brazil
| | - Leonardo Marcel Paiz
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, 85819-110 Cascavel, Paraná, Brazil
- Universidade Estadual de Maringá, Centro de Ciências Biológicas, 87020-900 Maringá, Paraná, Brazil
| | - Vladimir Pavan Margarido
- Universidade Estadual do Oeste do Paraná, Centro de Ciências Biológicas e da Saúde, 85819-110 Cascavel, Paraná, Brazil
- Universidade Estadual de Maringá, Centro de Ciências Biológicas, 87020-900 Maringá, Paraná, Brazil
| | - Carlos Alexandre Fernandes
- Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Mundo Novo, 79980-000 Mundo Novo, Mato Grosso do Sul, Brazil
| | - Éder André Gubiani
- Universidade Estadual do Oeste do Paraná, Centro de Engenharias e Ciências Exatas, 85903-000 Toledo, Paraná, Brazil
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da Silva FA, Schneider CH, Feldberg E, Baccaro FB, Carvalho NDM, Gross MC. Genomic Organization Under Different Environmental Conditions: Hoplosternum Littorale as a Model. Zebrafish 2016; 13:197-208. [PMID: 26981695 PMCID: PMC4892195 DOI: 10.1089/zeb.2015.1237] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The Amazon has abundant rivers, streams, and floodplains in both polluted and nonpolluted environments, which show great adaptability. Thus, the goal of this study was to map repetitive DNA sequences in both mitotic chromosomes and erythrocyte micronuclei of tamoatás from polluted and nonpolluted environments and to assess the possible genotoxic effects of these environments. Individuals were collected in Manaus, Amazonas (AM), and submitted to classical and molecular cytogenetic techniques, as well as to a blood micronucleus test. Diploid number equal to 60 chromosomes are present in all individuals, with 18S ribosomal DNA sites present in one chromosome pair and no interstitial telomeric sites on chromosomes. The micronucleus test showed no significant differences in pairwise comparisons between environments or collection sites, but the Rex3 retroelement was dispersed on the chromosomes of individuals from unpolluted environments and compartmentalized in individuals from polluted environments. Divergent numbers of 5S rDNA sites are present in individuals from unpolluted and polluted environments. The mapping of repetitive sequences revealed that micronuclei have different compositions both intra- and interindividually that suggests different regions are lost in the formation of micronuclei, and no single fragile region undergoes breaks, although repetitive DNA elements are involved in this process.
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Affiliation(s)
- Francijara Araújo da Silva
- Laboratório de Citogenômica Animal, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
| | - Carlos Henrique Schneider
- Laboratório de Citogenômica Animal, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
| | - Eliana Feldberg
- Laboratório de Genética Animal, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Fabricio Beggiato Baccaro
- Laboratório de Zoologia, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
| | - Natália Dayane Moura Carvalho
- Laboratório de Citogenômica Animal, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
| | - Maria Claudia Gross
- Laboratório de Citogenômica Animal, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
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Almeida JS, Affonso PRADM, Diniz D, Carneiro PLS, Dias AL. Chromosomal Variation in the Tropical Armored Catfish Callichthys Callichthys (Siluriformes, Callichthyidae): Implications for Conservation and Taxonomy in a Species Complex from a Brazilian Hotspot. Zebrafish 2013; 10:451-8. [DOI: 10.1089/zeb.2013.0885] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | | | - Débora Diniz
- Department of Biological Sciences, State University of Southwestern Bahia, Jequié, Brazil
| | | | - Ana Lúcia Dias
- Department of General Biology, State University of Londrina, Londrina, Brazil
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