Assessing genetic diversity of Brazilian reef fishes by chromosomal and DNA markers

Genetica
Pedro Manoel GalettiCecília Teixeira Aguilar

Abstract

Little is known on genetics of Brazilian coral reef fish and most of this information is limited to chromosome characterization of major representative species. The diploid chromosome number in marine fish varies from 2n= 22-26 to 2n = 240-260. Despite of this apparent diversity, most studied marine species have a diploid complement with 48 acrocentric chromosomes. This latter trend is mostly observed among Perciformes, an important major taxon of coral reef fishes. Studies in the families Pomacentridae, Pomacanthidae and Chaetodontidae, for example, have shown a common karyotype pattern entirely formed by 48 uniarmed chromosomes. However, rare numerical and structural chromosome polymorphisms and cryptic chromosome rearrangements involving heterochromatin segments and/or nucleolar organizing sites have been reported among such fishes. Although new chromosome forms can contribute to the establishment of genetically isolated populations, their role in reef fish speciation at marine realm still is an open question. More recently, genomic DNA analyses using RAPD and microsatellites, and sequencing and RFLP of mitochondrial DNA have increasingly been used in Atlantic reef fish species. Genetic homogeneity over wide geographical ran...Continue Reading

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Citations

Jul 11, 2009·Marine Biotechnology·Rafael Bueno NoletoMarta Margarete Cestari
Nov 13, 2014·Cytotechnology·Roger Raupp CiprianoMarta Margarete Cestari
Sep 10, 2014·TheScientificWorldJournal·Paulo Roberto Antunes de Mello AffonsoWagner Franco Molina
May 23, 2014·Marine Genomics·Wagner Franco MolinaClaudio Juan Bidau
Feb 19, 2008·Brazilian Journal of Biology = Revista Brasleira De Biologia·P R A M Affonso, P M Galetti
Sep 19, 2017·Comparative Cytogenetics·Fabilene Gomes PaimDébora Diniz
Jan 1, 2011·Comparative Cytogenetics·Tatiana Barbosa GalvãoWagner Franco Molina
Feb 10, 2017·The Journal of Heredity·Leandro A H AlmeidaPaulo R A M Affonso
Oct 20, 2018·Comparative Cytogenetics·Eugene Krysanov, Tatiana Demidova

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