ArticleThe Plant journal : for cell and molecular biology2020
The fate of 35S rRNA genes in the allotetraploid grass Brachypodium hybridum.
Article in The Plant journal : for cell and molecular biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 18 citations in OpenAlex.
- Dynamic evolution and hierarchical regulation of rDNA in polyploid oat.The Plant journal : for cell and molecular biology · 2026Article
- The impact of genome duplication on agronomically valuable traits in Ribes nigrum L.: a morpho-anatomical, physiological and cytogenetic evaluation.BMC plant biology · 2026Article
- Hybridization and embryological patterns underpinning reproductive barriers in Dactylorhiza (Orchidaceae).Scientific reports · 2025Article
- Thriving or Withering? Plant Molecular Cytogenetics in the First Quarter of the 21st Century.International journal of molecular sciences · 2025Review
- A cost-effective oligo-based barcode system for chromosome identification in longan and lychee.Horticulture research · 2025Article
- Hybrid Origin of ×International journal of molecular sciences · 2024Article
- Does time matter? Intraspecific diversity of ribosomal RNA genes in lineages of the allopolyploid model grass Brachypodium hybridum with different evolutionary ages.BMC plant biology · 2024Article
- Uniparental silencing of 5S rRNA genes in plant allopolyploids - insights from Cardamine (Brassicaceae).The Plant journal : for cell and molecular biology · 2024Article
- Diversity of Arbuscular Mycorrhizal Fungi in Distinct Ecosystems of the North Caucasus, a Temperate Biodiversity Hotspot.Journal of fungi (Basel, Switzerland) · 2023Article
- Uniparental expression of ribosomal RNA in ×Frontiers in plant science · 2023Article
- Hybridization and diversity of aquatic macrophyte Sparganium L. (Typhaceae) as revealed by high-throughput nrDNA sequencing.Scientific reports · 2022Article
- Cytomolecular Organisation of the Nuclear Genome.International journal of molecular sciences · 2022Article
- The Divergence of Chromosome Structures and 45S Ribosomal DNA Organization inPlants (Basel, Switzerland) · 2022Article
- Tracing the Evolution of the Angiosperm Genome from the Cytogenetic Point of View.Plants (Basel, Switzerland) · 2022Review
- Structure and Methylation of 35S rDNA in AllopolyploidsFrontiers in plant science · 2022Article
- To Be or Not to Be Expressed: The First Evidence of a Nucleolar Dominance Tissue-Specificity inFrontiers in plant science · 2021Article
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Authors and funding
8 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Nucleolar dominance (ND) consists of the reversible silencing of 35S/45S rDNA loci inherited from one of the ancestors of an allopolyploid. The molecular mechanisms by which one ancestral rDNA set is selected for silencing remain unclear. We applied a combination of molecular (Southern blot hybridization and reverse-transcription cleaved amplified polymorphic sequence analysis), genomic (analysis of variants) and cytogenetic (fluorescence in situ hybridization) approaches to study the structure, expression and epigenetic landscape of 35S rDNA in an allotetraploid grass that exhibits ND, Brachypodium hybridum (genome composition DDSS), and its putative progenitors, Brachypodium distachyon (DD) and Brachypodium stacei (SS). In progenitor genomes, B. stacei showed a higher intragenomic heterogeneity of rDNA compared with B. distachyon. In all studied accessions of B. hybridum, there was a reduction in the copy number of S homoeologues, which was accompanied by their inactive transcriptional status. The involvement of DNA methylation in CG and CHG contexts in the silencing of the S-genome rDNA loci was revealed. In the B. hybridum allotetraploid, ND is stabilized towards the D-genome units, irrespective of the polyphyletic origin of the species, and does not seem to be influenced by homoeologous 35S rDNA ratios and developmental stage.
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