Cytogenetics Meets Genomics: Cytotaxonomy and Genomic Relationships among Color Variants of the Asian Arowana Scleropages formosus

0572903 - ÚŽFG 2024 RIV CH eng J - Článek v odborném periodiku
Toma, G. A. - dos Santos, N. - dos Santos, R. - Ráb, Petr - Kretschmer, R. - Ezaz, T. - Bertollo, L.A.C. - Liehr, T. - Porto-Foresti, F. - Hatanaka, T. - Tanomtong, A. - Utsunomia, R. - Cioffi, M.B.
Cytogenetics Meets Genomics: Cytotaxonomy and Genomic Relationships among Color Variants of the Asian Arowana Scleropages formosus.
International Journal of Molecular Sciences. Roč. 24, č. 10 (2023), č. článku 9005. ISSN 1661-6596
Institucionální podpora: RVO:67985904
Klíčová slova: Osteoglossiformes * cytogenomics * chromosome * molecular cytogenetics * SatDNA
Obor OECD: Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology
Impakt faktor: 5.6, rok: 2022
Způsob publikování: Open access
https://www.mdpi.com/1422-0067/24/10/9005

Scleropages formosus (Osteoglossiformes, Teleostei) represents one of the most valued ornamental fishes, yet it is critically endangered due to overexploitation and habitat destruction. This species encompasses three major color groups that naturally occur in allopatric populations, but the evolutionary and taxonomic relationships of S. formosus color varieties remain uncertain. Here, we utilized a range of molecular cytogenetic techniques to characterize the karyotypes of five S. formosus color phenotypes, which correspond to naturally occurring variants: the red ones (Super Red), the golden ones (Golden Crossback and Highback Golden), the green ones (Asian Green and Yellow Tail Silver). Additionally, we describe the satellitome of S. formosus (Highback Golden) by applying a high-throughput sequencing technology. All color phenotypes possessed the same karyotype structure 2n = 50 (8m/sm + 42st/a) and distribution of SatDNAs, but different chromosomal locations of rDNAs, which were involved in a chromosome size polymorphism. Our results show indications of population genetic structure and microstructure differences in karyotypes of the color phenotypes. However, the findings do not clearly back up the hypothesis that there are discrete lineages or evolutionary units among the color phenotypes of S. formosus, but another case of interspecific chromosome stasis cannot be excluded.
Trvalý link: https://hdl.handle.net/11104/0343687