First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon)
Microsternarchus bilineatus is a neotropical electric fish species widely distributed in Amazonian ecosystems. This work reports the first karyotypic description of the species M. bilineatus, which presented 2n = 48 chromosomes, with a distinct karyotypic formula between the sexes: Males with 21 met...
| Autor principal: | Jesus, Isac Silva de |
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| Outros Autores: | Ferreira, Milena, Garcia, Caroline, Braga Ribeiro, Leila, Alves-Gomes, José Antônio, Feldberg, Eliana |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Zebrafish
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17390 |
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oai:repositorio:1-17390 |
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oai:repositorio:1-17390 First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) Jesus, Isac Silva de Ferreira, Milena Garcia, Caroline Braga Ribeiro, Leila Alves-Gomes, José Antônio Feldberg, Eliana Rna 18s Rna 5s Animals Brasil Chromosome Nor Female Genetics Gymnotiformes Karyotype Male Sex Chromosome Sexual Development Animal Brasil Female Gymnotiformes Karyotype Male Nucleolus Organizer Region Rna, Ribosomal, 18s Rna, Ribosomal, 5s Sex Characteristics Sex Chromosomes Microsternarchus bilineatus is a neotropical electric fish species widely distributed in Amazonian ecosystems. This work reports the first karyotypic description of the species M. bilineatus, which presented 2n = 48 chromosomes, with a distinct karyotypic formula between the sexes: Males with 21 metacentric (m)/submetacentric (sm) + 27 subtelocentric (st)/acrocentric (a) and fundamental number (FN) = 69 and females with 20 m/sm + 28 st/a and FN = 68. We found a probable recent sex system of XX/XY type. The nucleoli organizer regions (NORs) were multiple terminally located, and the heterochromatic blocks were mostly pericentromeric. The 18S rDNA markings confirmed NORs and their distinction between sexes, which suggested some differential role of this gene related to gender in this species. The 5S rDNA presented terminal markings on a single chromosome pair, with no distinction between sexes, and the telomeric probes have shown a uniform pattern in males and females. © Mary Ann Liebert, Inc. 2016. 2020-06-15T21:42:08Z 2020-06-15T21:42:08Z 2016 Artigo https://repositorio.inpa.gov.br/handle/1/17390 10.1089/zeb.2016.1281 en Volume 13, Número 6, Pags. 571-577 Restrito Zebrafish |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Rna 18s Rna 5s Animals Brasil Chromosome Nor Female Genetics Gymnotiformes Karyotype Male Sex Chromosome Sexual Development Animal Brasil Female Gymnotiformes Karyotype Male Nucleolus Organizer Region Rna, Ribosomal, 18s Rna, Ribosomal, 5s Sex Characteristics Sex Chromosomes |
| spellingShingle |
Rna 18s Rna 5s Animals Brasil Chromosome Nor Female Genetics Gymnotiformes Karyotype Male Sex Chromosome Sexual Development Animal Brasil Female Gymnotiformes Karyotype Male Nucleolus Organizer Region Rna, Ribosomal, 18s Rna, Ribosomal, 5s Sex Characteristics Sex Chromosomes Jesus, Isac Silva de First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| topic_facet |
Rna 18s Rna 5s Animals Brasil Chromosome Nor Female Genetics Gymnotiformes Karyotype Male Sex Chromosome Sexual Development Animal Brasil Female Gymnotiformes Karyotype Male Nucleolus Organizer Region Rna, Ribosomal, 18s Rna, Ribosomal, 5s Sex Characteristics Sex Chromosomes |
| description |
Microsternarchus bilineatus is a neotropical electric fish species widely distributed in Amazonian ecosystems. This work reports the first karyotypic description of the species M. bilineatus, which presented 2n = 48 chromosomes, with a distinct karyotypic formula between the sexes: Males with 21 metacentric (m)/submetacentric (sm) + 27 subtelocentric (st)/acrocentric (a) and fundamental number (FN) = 69 and females with 20 m/sm + 28 st/a and FN = 68. We found a probable recent sex system of XX/XY type. The nucleoli organizer regions (NORs) were multiple terminally located, and the heterochromatic blocks were mostly pericentromeric. The 18S rDNA markings confirmed NORs and their distinction between sexes, which suggested some differential role of this gene related to gender in this species. The 5S rDNA presented terminal markings on a single chromosome pair, with no distinction between sexes, and the telomeric probes have shown a uniform pattern in males and females. © Mary Ann Liebert, Inc. 2016. |
| format |
Artigo |
| author |
Jesus, Isac Silva de |
| author2 |
Ferreira, Milena Garcia, Caroline Braga Ribeiro, Leila Alves-Gomes, José Antônio Feldberg, Eliana |
| author2Str |
Ferreira, Milena Garcia, Caroline Braga Ribeiro, Leila Alves-Gomes, José Antônio Feldberg, Eliana |
| title |
First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| title_short |
First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| title_full |
First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| title_fullStr |
First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| title_full_unstemmed |
First cytogenetic description of Microsternarchus bilineatus (Gymnotiformes: Hypopomidae) from Negro River (Brazilian Amazon) |
| title_sort |
first cytogenetic description of microsternarchus bilineatus (gymnotiformes: hypopomidae) from negro river (brazilian amazon) |
| publisher |
Zebrafish |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17390 |
| _version_ |
1787142427786608640 |
| score |
11.755432 |