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Investigation of the role of repetitive DNA in the chromosome evolution of Apareiodon species(Characiformes, Parodontidae)

Grant number: 12/15258-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2012
Effective date (End): November 30, 2015
Field of knowledge:Biological Sciences - Genetics - Animal Genetics
Principal Investigator:Orlando Moreira Filho
Grantee:Josiane Baccarin Traldi
Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil


The family Parodontidae comprises three genera: Parodon, Apareiodon and Saccodon, including 32 species considered valid. These animals are distributed in South America and part of Panama, except in the South Atlantic coastal basin in the state of Bahia, Patagonia and the Amazon River channel. In general, the karyotype macrostructure of the family appears to be conserved, with a diploid number of 54 chromosomes, karyotypes consisting of metacentric chromosomes (m), submetacentric (sm) and subtelocentric (st) and centromeric heterochromatic blocks in almost all chromosome complement, as well as terminal blocks. However, there is diversity interspecific karyotype in micro-structure of this group. Chromosome analysis in Parodontidae species are found only for the Iguacu, Paraguay, Parana and Sao Francisco river basins. The Tocantins-Araguaia river basin is one of the largest basins of Brazil and presents a high level of endemism of species of fish. However, cytogenetic studies involving species in this area are still restricted. Considering the small number of species belonging to the family Parodontidae and the importance of endemism in the ichthyofauna of the Tocantins-Araguaia, chromosome studies in Apareiodon species of this basin, absent until now, will assist in resolving taxonomic problems in the family, and contribute to establish a model of the chromosome in this group, emphasizing the role of repetitive DNA in this process.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SCHEMBERGER, MICHELLE ORANE; NOGAROTO, VIVIANE; ALMEIDA, MARA CRISTINA; ARTONI, ROBERTO FERREIRA; VALENTE, GUILHERME TARGINO; MARTINS, CESAR; MOREIRA-FILHO, ORLANDO; CESTARI, MARTA MARGARETE; VICARI, MARCELO RICARDO. Sequence analyses and chromosomal distribution of the Tc1/Mariner element in Parodontidae fish (Teleostei: Characiformes). Gene, v. 593, n. 2, p. 308-314, . (12/15258-0, 13/04533-3)

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