B chromosomes in Amazonian cichlid species

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Título:	B chromosomes in Amazonian cichlid species
Autor:	Feldberg, Eliana Porto, Jorge Ivan Rebelo Alves-Brinn, M. N. Mendonça, M. N C Benzaquem, Denise Corrêa
Palavras-chave:	Autosome C Banding Chromosome Structure Cichla Cichla Monoculus Crenicichla Reticulata Fish Microchromosome Nonhuman Priority Journal Standardization Supernumerary Chromosome Animal Chromosomes Cichlids Heterochromatin Kidney South America Bairdiella Ronchus Cichla Cichla Monoculus Cichla Sp. Cichlidae Crenicara Crenicichla
Data do documento:	2004
Revista:	Cytogenetic and Genome Research
É parte de:	Volume 106, Número 2-4, Pags. 195-198
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.
DOI:	10.1159/000079287
Aparece nas coleções:	Artigos

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