Chromosomal stasis in distinct families of marine Percomorpharia from South Atlantic
| Autor: | Patrícia Elda Sobrinho-Scudeler, Paulo Roberto Antunes de Mello Affonso, Leandro Aragão da Hora Almeida, Claudio Oliveira, Fabilene Gomes Paim, Débora Diniz |
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| Přispěvatelé: | Universidade Estadual do Sudoeste da Bahia (UESB), Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine ribosomal genes lcsh:QH426-470 Short Communication ved/biology.organism_classification_rank.species Plant Science Percomorpha 010603 evolutionary biology 01 natural sciences Lutjanus synagris South Atlantic 03 medical and health sciences Lutjanidae Genetics Rypticus Cytotaxonomy biology Ecology ved/biology Karyotype biology.organism_classification Ephippidae lcsh:Genetics Chaetodipterus faber 030104 developmental biology Evolutionary biology Ephippiformes Biological dispersal Animal Science and Zoology Biotechnology |
| Zdroj: | Comparative Cytogenetics Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Comparative Cytogenetics, Vol 11, Iss 2, Pp 299-307 (2017) |
| ISSN: | 1993-0771 |
| Popis: | Made available in DSpace on 2021-06-25T10:57:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 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 Brous-sonet, 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. Departamento de Ciências Biológicas Universidade Estadual do Sudoeste da Bahia (UESB) Laboratório de Biologia e Genética de Peixes Instituto de Biociências de Botucatu UNESP Laboratório de Biologia e Genética de Peixes Instituto de Biociências de Botucatu UNESP |
| Databáze: | OpenAIRE |
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