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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)
- 1.0340701 - BFÚ 2010 RIV GB eng J - Journal Article
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
R&D Projects: GA ČR(CZ) GA521/07/0116; GA MŠMT(CZ) LC06004; GA ČR(CZ) GD204/09/H002
Institutional research plan: CEZ:AV0Z50040507; CEZ:AV0Z50040702
Keywords : polyploidy * rDNA genes * Rosaceae
Subject RIV: BO - Biophysics
Impact factor: 4.569, year: 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.
Permanent Link: http://hdl.handle.net/11104/0183890
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