title: Chromosomal location and nucleotide sequences of 5S ribosomal DNA of two cyprinid species (Osteichthyes, Pisces).
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.
authors.affiliation: Department of Biology, Faculty of Science, Toho University, Funabashi, Chiba, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Inafuku
authors.forename: M
authors.initials: M
authors.lastname: Nabeyama
authors.forename: Y
authors.initials: Y
authors.lastname: Kikuma
authors.forename: J
authors.initials: J
authors.lastname: Saitoh
authors.forename: S
authors.initials: S
authors.lastname: Kubota
authors.forename: S
authors.initials: S
authors.lastname: Kohno
mesh_terms: D000818:Animals; D001483:Base Sequence; D003530:Cyprinidae / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics* / Q000302:isolation & purification; D017404:In Situ Hybridization, Fluorescence; D008969:Molecular Sequence Data; D009697:Nucleolus Organizer Region; D020161:Physical Chromosome Mapping; D012341:RNA, Ribosomal, 5S / Q000235:genetics* / Q000302:isolation & purification; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D020080:Tandem Repeat Sequences
chemical_list: D004275:DNA, Ribosomal; D012341:RNA, Ribosomal, 5S