| Literature DB >> 10841046 |
J Inafuku1, M Nabeyama, Y Kikuma, J Saitoh, S Kubota, S Kohno.
Abstract
5S ribosomal DNAs (rDNAs) from two cyprinid species, Acheilognathus tabira subsp. 1 and Cyprinus carpio, were isolated and sequenced. Tandemly arranged rDNAs were 179 bp in A. tabira and 204 bp in C. carpio. The non-transcribed spacer region elucidates the size difference of 5S rDNA between the two species. Fluorescence in-situ hybridization (FISH) localized 5S rDNAs to the short arms of two pairs of chromosomes in A. tabira and two to four pairs in C. carpio. Subsequent analysis demonstrated NORs in one pair of chromosomes in both species. Both the NOR and 5S rDNA are carried by a chromosome pair in A. tabira, but they are located on different chromosomes separately in C. carpio. Karyotype evolution by tetraploidy seems complex in cyprinid species.Entities:
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Year: 2000 PMID: 10841046 DOI: 10.1023/a:1009292610618
Source DB: PubMed Journal: Chromosome Res ISSN: 0967-3849 Impact factor: 5.239