Karyological characterization of Mugil trichodon Poey, 1876 (Pisces: Mugilidae)
DOI:
https://doi.org/10.3989/scimar.2005.69n4525Keywords:
karyotype, NOR, C-banding, Mugil trichodonAbstract
Cytogenetic studies were conducted on Mugil trichodon from Margarita Island, Venezuela. The species showed a karyotype 2n=48 with entirely acrocentric chromosomes (Arm number, NF=48). Chromosomes gradually decreased in size and did not allow a clear distinction of homologues, except for one marker pair, which showed a conspicuous secondary constriction. C-banding showed heterochromatic blocks restricted at the centromeric regions of all the chromosomes. Some were more obvious than others, with the exception of the chromosome pair that had a secondary constriction with entirely heterochromatic short arms. Sequential staining with Giemsa and AgNO3 demonstrated the conspicuous secondary constrictions corresponding to the NORs, and these had significant intraindividual size variations between both homologous chromosomes. The data obtained here support the contention that Mugilidae have a conservative chromosome macrostructure and reinforce the hypothesis that small structural chromosome rearrangements involving active NOR sites are the main cause of the karyotypic diversification seen in this group.
Downloads
Download data is not yet available.
Downloads
Published
2005-12-30
How to Cite
1.
Nirchio M, Ron E, Rosi AR. Karyological characterization of Mugil trichodon Poey, 1876 (Pisces: Mugilidae). Sci. mar. [Internet]. 2005Dec.30 [cited 2024Jul.23];69(4):525-30. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/281
Issue
Section
Articles
License
Copyright (c) 2005 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.