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Título: | Karyotypic Comparison of Hoplias malabaricus (Bloch, 1794) (Characiformes, Erythrinidae) in Central Amazon |
Autor: | Corrêa, Guimarães, Erika Milena Carvalho, Natália Dayane Moura Schneider, Carlos Henrique Feldberg, Eliana Gross, Maria Claudia |
Palavras-chave: | Heterochromatin Ribosome Dna Animals Characiformes Chromosomal Mapping Classification Comparative Study Dna Sequence Evolution In Situ Hybridization, Fluorescence Genetics Genome Heterochromatin Karyotyping Procedures Veterinary Animal Biological Evolution Characiformes Chromosome Mapping Ribosomal Dna Genome Heterochromatin In Situ Hybridization, Fluorescence Karyotyping Sequence Analysis, Dna |
Data do documento: | 2017 |
Revista: | Zebrafish |
É parte de: | Volume 14, Número 1, Pags. 80-89 |
Abstract: | Hoplias malabaricus comprises seven karyomorphs (A-G) and evolutionary units have been described in some of them. In this study, the karyotypic composition and genomic organization of individual H. malabaricus from Central Amazon are described and to verify whether they can be classified according to known karyomorphs. Individuals from the Ducke Reserve have 2n = 42 chromosomes, similar to karyomorph A. Individuals from Catalão Lake and Marchantaria Island exhibit 2n = 40 chromosomes, similar to karyomorph C. Regarding the constitutive heterochromatin, individuals from all locations present centromeric/pericentromeric blocks, in addition to some bitelomeric and interstitial markings. The number of chromosomes with nucleolar organizer region, 5S rDNA and 18S rDNA sites varied among the different locations. The Rex 3 element has a compartmentalized distribution at the terminal and centromeric regions of most chromosomes, with subtle differences among populations. Fluorescence in situ hybridization performed with a telomeric probe allowed the detection of these regions only at the terminal ends of the chromosomes. Thus, only the chromosomal macrostructure (karyomorphs A-G) is not sufficient to establish evolutionary units within the H. malabaricus group, considering differences in the genome organization that are found among their populations. Such differences in the genomic organization could be mainly caused by the sedentary habits of this species. © Copyright 2017, Mary Ann Liebert, Inc. 2017. |
DOI: | 10.1089/zeb.2016.1283 |
Aparece nas coleções: | Artigos |
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