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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/50130
Title: Genomic Organization of Repetitive DNA Elements and Extensive Karyotype Diversity of Silurid Catfishes (Teleostei: Siluriformes): A Comparative Cytogenetic Approach
Authors: Sukhonthip Ditcharoen
Luiz Antonio Carlos Bertollo
Petr Ráb
Eva Hnátková
Wagner Franco Molina
Thomas Liehr
Alongklod Tanomtong
Costas Triantaphyllidis
Catherine Ozouf-Costaz
Sampan Tongnunui
Puan Pengseng
Weerayuth Supiwong
Rouben Aroutiounian
Marcelo de Bello Cioff
Yerevan State University
Institute of Animal Physiology and Genetics of the Academy of Sciences of the Czech Republic
Walailak University
Czech University of Life Sciences Prague
Universidade Federal do Rio Grande do Norte
Universitätsklinikum Jena und Medizinische Fakultät
Khon Kaen University
Aristotle University of Thessaloniki
Universidade Federal de Sao Carlos
Mahidol University
Sorbonne Université
Keywords: Biochemistry, Genetics and Molecular Biology;Chemical Engineering;Chemistry;Computer Science
Issue Date: 2-Jul-2019
Citation: International Journal of Molecular Sciences. Vol.20, No.14 (2019)
Abstract: © 2019 by the authors. All rights reserved. The catfish family Siluridae contains 107 described species distributed in Asia, but with some distributed in Europe. In this study, karyotypes and other chromosomal characteristics of 15 species from eight genera were examined using conventional and molecular cytogenetic protocols. Our results showed the diploid number (2n) to be highly divergent among species, ranging from 2n = 40 to 92, with the modal frequency comprising 56 to 64 chromosomes. Accordingly, the ratio of uni- and bi-armed chromosomes is also highly variable, thus suggesting extensive chromosomal rearrangements. Only one chromosome pair bearing major rDNA sites occurs in most species, except for Wallago micropogon, Ompok siluroides, and Kryptoterus giminus with two; and Silurichthys phaiosoma with five such pairs. In contrast, chromosomes bearing 5S rDNA sites range from one to as high as nine pairs among the species. Comparative genomic hybridization (CGH) experiments evidenced large genomic divergence, even between congeneric species. As a whole, we conclude that karyotype features and chromosomal diversity of the silurid catfishes are unusually extensive, but parallel some other catfish lineages and primary freshwater fish groups, thus making silurids an important model for investigating the evolutionary dynamics of fish chromosomes.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/50130
metadata.dc.identifier.url: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071869183&origin=inward
ISSN: 14220067
16616596
Appears in Collections:Scopus 2019

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