Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/6499
Title: B chromosomes in Amazonian cichlid species
Authors: Feldberg, Eliana
Porto, Jorge Ivan Rebelo
Alves-Brinn, M. N.
Mendonça, M. N C
Benzaquem, Denise Corrêa
Keywords: Autosome
C banding
Chromosome structure
Cichla
Cichla monoculus
Crenicichla reticulata
Fish
Microchromosome
Nonhuman
Priority journal
Standardization
Supernumerary chromosome
Animals
Chromosomes
Cichlids
Heterochromatin
Kidney
South america
Bairdiella ronchus
Cichla
Cichla monoculus
Cichla sp.
Cichlidae
Crenicara
Crenicichla
Issue Date: 2004
metadata.dc.publisher.journal: Cytogenetic and Genome Research
metadata.dc.relation.ispartof: v. 106, n. 2/abr
Abstract: B chromosomes are reported in three different Amazonian cichlid species. One to three supernumerary microchromosomes were detected in the peacock bass Cichla monoculus (4 out of 28 specimens) and Cichla sp. (4 out of 13 specimens), and pike cichlids Crenicichla reticulata (2 out of 5 specimens), with no similar standard chromosomal morphology. C-banding revealed that B chromosomes are totally heterochromatic. We suggest two scenarios for the origin of these B chromosomes either by chromosomal breakdowns due to mutagenic action of methyl mercury present in the aquatic environment or by interspecific origin due to hybridization events. Copyright © 2004 S. Karger AG, Basel.
URI: https://repositorio.inpa.gov.br/handle/1/6499
metadata.dc.identifier.doi: 10.1159/000079287
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