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Divergent location of ribosomal genes in chromosomes of fish thorny-headed worms, Pomphorhynchus laevis and Pomphorhynchus tereticollis (Acanthocephala)

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F07%3A00045460" target="_blank" >RIV/60077344:_____/07:00045460 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Divergent location of ribosomal genes in chromosomes of fish thorny-headed worms, Pomphorhynchus laevis and Pomphorhynchus tereticollis (Acanthocephala)

  • Original language description

    We studied distribution of ribosomal DNA (rDNA) sequences along with chromosomal location of the nucleolar organizer regions (NORs) in two fish parasites, Pomphorhynchus laevis and P. tereticollis. Fluorescence in situ hybridization with 18S rDNA probe identified two clusters of rDNA in each species, but revealed a remarkable difference in their location on chromosomes. In P. laevis, the rDNA-FISH signals were found in long arms of the first chromosome pair and in short arms of the second pair. Whereasin P. tereticollis, rDNA clusters were located in long arms of both the first and second chromosome pairs. A possible scenario of the second chromosome rearrangement during karyotype evolution of the two species involves two successive pericentric inversions. The divergent location of rDNA clusters in the chromosome No. 2 supports current classification of P. tereticollis, previously considered a synonym of P. laevis, as a separate species.

  • Czech name

    Divergence ribosomálních genů na chromosomech vrtejšů Pomphorhynchus laevis and P. tereticollis (Acanthocephala)

  • Czech description

    Studovali jsem distribuci ribosomálních sekvencí DNA (rDNA) spolu s lokalizací organizátorů jadérek (NOR) u dvou parazitů ryb, Pomphorhynchus laevis and P. tereticollis. Fluorescenční in situ hybridizací (FISH) se sondou pro 18S rDNA identifikovala dva klastry rDNA u obou druhů, ale prokázala značné rozdíly v jejich chromosomální lokalizaci. U P. laevis byly klastry rDNA zjištěny na dlouhém raménku prvního páru a na krátkém raménku druhého páru chromosomů. Kdežto u P. tereticollis byly oba klastry rDNAlokalizovány na dlouhých raméncích prvního i druhého páru chromosomů. K této evoluční změně došlo pravděpodobně dvěmi po sobě následujícími pericentrickými inverzemi během speciace. Naše výsledky podporují současnou klasifikaci P. tereticollis, dříve považovaného za synonymum P. laevis, jako samostatného druhu.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    EB - Genetics and molecular biology

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Genetica

  • ISSN

    0016-6707

  • e-ISSN

  • Volume of the periodical

    131

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    9

  • Pages from-to

    141-149

  • UT code for WoS article

  • EID of the result in the Scopus database