Počet záznamů: 1

Frequent silencing of rDNA loci on the univalent-forming genomes contrasts with their stable expression on the bivalent-forming genomes in polyploid dogroses (Rosa sect. caninae)

  1. 1.
    0340701 - BFU-R 2010 RIV GB eng J - Článek v odborném periodiku
    Crhák Khaitová, Lucie - Werlemark, G. - Nybom, H. - Kovařík, Aleš
    Frequent silencing of rDNA loci on the univalent-forming genomes contrasts with their stable expression on the bivalent-forming genomes in polyploid dogroses (Rosa sect. caninae).
    Heredity. Roč. 104, č. 1 (2010), s. 113-120 ISSN 0018-067X
    Grant CEP: GA ČR(CZ) GA521/07/0116; GA MŠk(CZ) LC06004; GA ČR(CZ) GD204/09/H002
    Výzkumný záměr: CEZ:AV0Z50040507; CEZ:AV0Z50040702
    Klíčová slova: polyploidy * rDNA genes * Rosaceae
    Kód oboru RIV: BO - Biofyzika
    Impakt faktor: 4.569, rok: 2010

    Based on several polymorphic sites in the internal transcribed spacers (ITSs), we identified six major rRNA gene families (alpha, beta, gamma, delta, epsilon, omega) in pentaploid R.canina, R. rubiginosa, R. dumalis, R. sherardii, R. caesia and tetraploid (2n = 4x = 28) R.mollis. Results showed that β rDNA family likely occurs preferentially on bivalent forming chromosomes that are transmitted from the pollen and dominantly expresses in all dogrose species, whereas, families carried on univalent chromosomes are, in some cases, silenced.
    Trvalý link: http://hdl.handle.net/11104/0183890