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Genomic Organization of Repetitive DNA Elements and Extensive Karyotype Diversity of Silurid Catfishes (Teleostei: Siluriformes): A Comparative Cytogenetic Approach

S. Ditcharoen, L. Antonio Carlos Bertollo, P. Ráb, E. Hnátková, W. Franco Molina, T. Liehr, A. Tanomtong, C. Triantaphyllidis, C. Ozouf-Costaz, S. Tongnunui, P. Pengseng, W. Supiwong, R. Aroutiounian, M. de Bello Cioffi,

. 2019 ; 20 (14) : . [pub] 20190719

Jazyk angličtina Země Švýcarsko

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc19044642

Grantová podpora
401962/2016-4 and 302449/2018-3 Conselho Nacional de Desenvolvimento Científico e Tecnológico
2018/22033-1 Fundação de Amparo à Pesquisa do Estado de São Paulo
88881.136128/2017-01 CAPES/Alexander von Humboldt
PHD/0165/2559 and MRG6080020 Thailand Research Fund (TRF)

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.

Departamento de Biologia Celular e Genética Centro de Biociências Universidade Federal do Rio Grande do Norte Natal RN 59078970 Brazil

Departamento de Genética e Evolução Universidade Federal de São Carlos Rodovia Washington Luiz Km 235 C P 676 São Carlos SP 13565 905 Brazil

Department of Conservation Biology Mahidol University Kanchanaburi Campus Sai Yok Kanchanaburi Province 71150 Thailand

Department of Genetics and Cytology Yerevan State University Yerevan 0025 Armenia

Department of Genetics Development and Molecular Biology Faculty of Sciences School of Biology Aristotle University of Thessaloniki University Campus Thessaloniki 54124 Greece

Department of Zoology and Fisheries Faculty of Agrobiology Food and Natural Resources Czech University of Life Sciences Kamýcká 129 Prague 165 00 Czech Republic

Faculty of Applied Science and Engineering Khon Kaen University Nong Khai Campus Muang Nong Khai 43000 Thailand

Institute of Human Genetics University Hospital Jena Jena 07747 Germany

Laboratorie Evolution Paris Seine Institut de Biologie Paris Seine Sorbonne Universités Case 5 7 Quai St Bernard Paris 75952 Paris CEDEX 05 France

Laboratory of Fish Genetics Institute of Animal Physiology and Genetics Czech Academy of Sciences Rumburská 89 Liběchov 277 21 Czech Republic

School of Agricultural of Technology Walailak University Thasala Nakhon Si Thammarat 80160 Thailand

Toxic Substances in Livestock and Aquatic Animals Research Group Department of Biology Faculty of Science Khon Kaen University Muang Khon Kaen 40002 Thailand

Citace poskytuje Crossref.org

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