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)

0340701 - BFÚ 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. E-ISSN 1365-2540
Grant CEP: GA ČR(CZ) GA521/07/0116; GA MŠMT(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