Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon
Synbranchidae belongs to the Synbranchiformes and occurs in Africa, Asia, Australia, Mexico, and Central and South America. This family comprises four genera: Synbranchus, Ophisternon, Monopterus, and Macrotrema. Only two are known from the neotropical region, Ophisternon and Synbranchus. According...
| Autor principal: | Carvalho, Natália Dayane Moura |
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| Outros Autores: | Gross, Maria Claudia, Schneider, Carlos Henrique, Terêncio, Maria Leandra, Zuanon, Jansen, Feldberg, Eliana |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Genetica
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18033 |
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oai:repositorio:1-18033 |
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oai:repositorio:1-18033 Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon Carvalho, Natália Dayane Moura Gross, Maria Claudia Schneider, Carlos Henrique Terêncio, Maria Leandra Zuanon, Jansen Feldberg, Eliana Ribosome Dna Animals Chromosome Chromosome Analysis Chromosome Banding Pattern Comparative Study In Situ Hybridization, Fluorescence Genetics Karyotype Smegmamorpha Animal Chromosome Banding Chromosomes Cytogenetic Analysis Ribosomal Dna In Situ Hybridization, Fluorescence Karyotype Smegmamorpha Ophisternon Synbranchidae Synbranchiformes Synbranchus Synbranchus Marmoratus Synbranchidae belongs to the Synbranchiformes and occurs in Africa, Asia, Australia, Mexico, and Central and South America. This family comprises four genera: Synbranchus, Ophisternon, Monopterus, and Macrotrema. Only two are known from the neotropical region, Ophisternon and Synbranchus. According to current classification, Synbranchus has three valid species: S. marmoratus (Bloch 1795), S. madeirae (Rosen and Rumney 1972), and S. lampreia (Favorito, Zanata and Assumpção 2005). Thus the present research is aimed to cytogenetically characterize (by classical and molecular methods) two syntopic species-S. aff. lampreia and S. madeirae-from the central Amazon basin to validate the taxonomy of both species and provide a revisionary discussion on the cytogenetics of Synbranchiformes. Synbranchus aff. lampreia was found to possess 2n = 44 chromosomes (6 m + 2st + 36a, NF = 50), while S. madeirae had 2n = 46 chromosomes (6 m + 2st + 38a, NF = 52). Constitutive heterochromatin was dominant in the centromeric and terminal regions of most of the chromosomes in both species, although the precise distribution patterns were species-specific. The nucleolar organizing region was single in S. aff. lampreia and multiple in S. madeirae, as indicated by both AgNO3 and hybridization using 18S rDNA probes. The 5S rDNA sites were located interstitially on the long arms of an acrocentric pair in both species, and the telomeric probe did not show any interstitial sites in either species. These data indicate the occurrence of interspecific karyotypic variability in Synbranchus and suggest that taxonomic review for this genus is necessary. © 2012 Springer Science+Business Media B.V. 2020-06-15T21:51:07Z 2020-06-15T21:51:07Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/18033 10.1007/s10709-012-9666-5 en Volume 140, Número 4-6, Pags. 149-158 Restrito Genetica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Ribosome Dna Animals Chromosome Chromosome Analysis Chromosome Banding Pattern Comparative Study In Situ Hybridization, Fluorescence Genetics Karyotype Smegmamorpha Animal Chromosome Banding Chromosomes Cytogenetic Analysis Ribosomal Dna In Situ Hybridization, Fluorescence Karyotype Smegmamorpha Ophisternon Synbranchidae Synbranchiformes Synbranchus Synbranchus Marmoratus |
| spellingShingle |
Ribosome Dna Animals Chromosome Chromosome Analysis Chromosome Banding Pattern Comparative Study In Situ Hybridization, Fluorescence Genetics Karyotype Smegmamorpha Animal Chromosome Banding Chromosomes Cytogenetic Analysis Ribosomal Dna In Situ Hybridization, Fluorescence Karyotype Smegmamorpha Ophisternon Synbranchidae Synbranchiformes Synbranchus Synbranchus Marmoratus Carvalho, Natália Dayane Moura Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| topic_facet |
Ribosome Dna Animals Chromosome Chromosome Analysis Chromosome Banding Pattern Comparative Study In Situ Hybridization, Fluorescence Genetics Karyotype Smegmamorpha Animal Chromosome Banding Chromosomes Cytogenetic Analysis Ribosomal Dna In Situ Hybridization, Fluorescence Karyotype Smegmamorpha Ophisternon Synbranchidae Synbranchiformes Synbranchus Synbranchus Marmoratus |
| description |
Synbranchidae belongs to the Synbranchiformes and occurs in Africa, Asia, Australia, Mexico, and Central and South America. This family comprises four genera: Synbranchus, Ophisternon, Monopterus, and Macrotrema. Only two are known from the neotropical region, Ophisternon and Synbranchus. According to current classification, Synbranchus has three valid species: S. marmoratus (Bloch 1795), S. madeirae (Rosen and Rumney 1972), and S. lampreia (Favorito, Zanata and Assumpção 2005). Thus the present research is aimed to cytogenetically characterize (by classical and molecular methods) two syntopic species-S. aff. lampreia and S. madeirae-from the central Amazon basin to validate the taxonomy of both species and provide a revisionary discussion on the cytogenetics of Synbranchiformes. Synbranchus aff. lampreia was found to possess 2n = 44 chromosomes (6 m + 2st + 36a, NF = 50), while S. madeirae had 2n = 46 chromosomes (6 m + 2st + 38a, NF = 52). Constitutive heterochromatin was dominant in the centromeric and terminal regions of most of the chromosomes in both species, although the precise distribution patterns were species-specific. The nucleolar organizing region was single in S. aff. lampreia and multiple in S. madeirae, as indicated by both AgNO3 and hybridization using 18S rDNA probes. The 5S rDNA sites were located interstitially on the long arms of an acrocentric pair in both species, and the telomeric probe did not show any interstitial sites in either species. These data indicate the occurrence of interspecific karyotypic variability in Synbranchus and suggest that taxonomic review for this genus is necessary. © 2012 Springer Science+Business Media B.V. |
| format |
Artigo |
| author |
Carvalho, Natália Dayane Moura |
| author2 |
Gross, Maria Claudia Schneider, Carlos Henrique Terêncio, Maria Leandra Zuanon, Jansen Feldberg, Eliana |
| author2Str |
Gross, Maria Claudia Schneider, Carlos Henrique Terêncio, Maria Leandra Zuanon, Jansen Feldberg, Eliana |
| title |
Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| title_short |
Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| title_full |
Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| title_fullStr |
Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| title_full_unstemmed |
Cytogenetics of Synbranchiformes: A comparative analysis of two Synbranchus Bloch, 1795 species from the Amazon |
| title_sort |
cytogenetics of synbranchiformes: a comparative analysis of two synbranchus bloch, 1795 species from the amazon |
| publisher |
Genetica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18033 |
| _version_ |
1787144719880421376 |
| score |
11.755432 |