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First chromosomal analysis in Gymnarchus niloticus (Gymnarchidae: Osteoglossiformes): insights into the karyotype evolution of this ancient fish order
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SYSNO ASEP 0495749 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název First chromosomal analysis in Gymnarchus niloticus (Gymnarchidae: Osteoglossiformes): insights into the karyotype evolution of this ancient fish order Tvůrce(i) Hatanaka, T. (BR)
de Oliveira, E. A. (BR)
Ráb, Petr (UZFG-Y) RID, ORCID
Yano, C. F. (BR)
Bertollo, L.A.C. (BR)
Ezaz, T. (AU)
Jegede, O. I. (NG)
Liehr, T. (DE)
Olaleye, V. F. (NG)
Cioffi, M. de B. (BR)Zdroj.dok. Biological Journal of the Linnean Society. - : Oxford University Press - ISSN 0024-4066
Roč. 125, č. 1 (2018), s. 83-92Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova ancient fishes ; chromosome banding ; comparative genome hybridiztaion Vědní obor RIV EB - Genetika a molekulární biologie Obor OECD Genetics and heredity (medical genetics to be 3) CEP EF15_003/0000460 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UZFG-Y - RVO:67985904 UT WOS 000442937000008 EID SCOPUS 85054860856 DOI 10.1093/biolinnean/bly098 Anotace Osteoglossiformes is one of the most ancient (Early Triassic) groups of freshwater teleosts and has at least one representative on each continent of the Southern Hemisphere, with the exception of Antarctica. Among its six described families, the Gymnarchidae occurs in many African rivers, including the river Nile, where Gymnarchus niloticus is its only representative. In this study we provide, for the first time, a comprehensive cytogenetic analysis for G. niloticus, which includes definition of the standard karyotype, C-banding, repetitive DNA mapping and comparative genomic hybridization, in order to investigate its chromosomal patterns and provide new data for comparative analyses with other Osteoglossiformes species. The 2n was 34 (26 metacentric + 8 submetacentric) in both sexes, and C-positive heterochromatic bands were detected in the centromeric/pericentromeric regions of all chromosomes. The simultaneous detection of 18S and 5S ribosomal DNAs showed simple and non-syntenical locations for such sequences, and a Chromomycin A3-positive band was observed, which is co-localized within the 18S ribosomal RNA gene sequences. Fluorescence in situ hybridization using U2 small nuclear RNA, Rex6 and some microssatelites as probes showed a scattered distribution among chromosomes. Data from comparative genomic hybridization experiments with some other African Osteoglossiformes species showed that all these species have an advanced stage of sequence divergence. The results highlight the evolutionary diversification of osteoglossiform fishes. Pracoviště Ústav živočišné fyziologie a genetiky Kontakt Jana Zásmětová, knihovna@iapg.cas.cz, Tel.: 315 639 554 Rok sběru 2019
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