Karyoevolutionary aspects of Atlantic hogfishes (Labridae-Bodianinae), with evidence of an atypical decondensed argentophilic heterochromatin

Marine Genomics
W F MolinaLuiz Antonio Carlos Bertollo

Abstract

Fish from the family Labridae elicit considerable ecological interest, especially due to their complex interactions with the reef environment. Different karyoevolutionary tendencies have been identified in the subfamilies Bodianinae, Corinae and Cheilinae. Chromosomal analyses conducted in the Atlantic species Bodianus rufus (2n=48; 6m+12sm+14st+16a, FN=80), Bodianus pulchellus (2n=48; 4m+12sm+14st+18a, FN=78) and Bodianus insularis (2n=48; 4m+12sm+14st+18a, FN=78) identified Ag-NOR/18SrDNA sites located only in the terminal region of the short arm (p) of the largest subtelocentric pair. The 5S rDNA genes were mapped in the terminal region of the long arm (q) of the largest acrocentric pair and the p arm of chromosome 19 in B. insularis. The karyotype of the three species shows an extensive heterochromatic and argentophilic region, exceptionally decondensed, located in the p arm of the second subtelocentric pair. This region does not correspond to a NOR site, since it is not hybridized with 18S rDNA probes, and is not GC-rich, as generally occurs with nucleolus organizer regions of lower invertebrates. Heterochromatin in the three species is reduced and distributed over the centromeric and pericentromeric regions of chromosomes...Continue Reading

References

Jan 1, 1989·Cytogenetics and Cell Genetics·T HaafM Schmid
Dec 20, 1988·Journal of Molecular Biology·S De LucchiniI Nardi
Jun 16, 2005·Genetica·Paulo Roberto Antunes de Mello Affonso, Pedro Manoel Galetti
Feb 28, 2006·Genetica·Pedro Manoel GalettiCecília Teixeira Aguilar

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Citations

Sep 19, 2017·Comparative Cytogenetics·Fabilene Gomes PaimDébora Diniz
Jan 27, 2017·Comparative Cytogenetics·Karlla Danielle Jorge AmorimWagner Franco Molina
Feb 10, 2017·The Journal of Heredity·Leandro A H AlmeidaPaulo R A M Affonso

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