ArticlePloS one2017
45S rDNA external transcribed spacer organization reveals new phylogenetic relationships in Avena genus.
Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Ribosome Heterogeneity in Plants: The Causes of This Phenomenon and Its Implications on Gene Expression.Plants (Basel, Switzerland) · 2026Review
- Comparative assessment of species identification methods for EuropeanFrontiers in plant science · 2025Article
- Genome Variability in Artificial Allopolyploid Hybrids ofInternational journal of molecular sciences · 2024Article
- The Divergence of Chromosome Structures and 45S Ribosomal DNA Organization inPlants (Basel, Switzerland) · 2022Article
- Molecular cytogenetics of valuable Arctic and sub-Arctic pasture grass species from the Aveneae/Poeae tribe complex (Poaceae).BMC genetics · 2019Article
- Oat evolution revealed in the maternal lineages of 25 Avena species.Scientific reports · 2018Article
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3 authors.
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Abstract
The genus Avena comprises four distinct genomes organized in diploid (AA or CC), tetraploid (AABB or AACC) and hexaploid species (AACCDD), constituting an interesting model for phylogenetic analysis. The aim of this work was to characterize 45S rDNA intergenic spacer (IGS) variability in distinct species representative of Avena genome diversity-A. strigosa (AA), A. ventricosa (CvCv), A. eriantha (CpCp), A. barbata (AABB), A. murphyi (AACC), A. sativa (AACCDD) and A. sterilis (AACCDD) through the assessment of the 5' external transcribed spacer (5'-ETS), a promising IGS region for phylogenetic studies poorly studied in Avena genus. In this work, IGS length polymorphisms were detected mainly due to distinct 5'-ETS sequence types resulting from major differences in the number and organization of repeated motifs. Although species with A genome revealed a 5'-ETS organization (A-organization) similar to the one previously described in A. sativa, a distinct organization was unraveled in C genome diploid species (C-organization). Interestingly, such new organization presents a higher similarity with other Poaceae species than A-genome sequences, supporting the hypothesis of C-genome being the ancestral Avena genome. Additionally, polyploid species with both genomes mainly retain the A-genome 5'-ETS organization, confirming the preferential elimination of C-genome sequences in Avena polyploid species. Moreover, 5'-ETS sequences phylogenetic analysis consistently clustered the species studied according to ploidy and genomic constitution supporting the use of ribosomal genes to highlight Avena species evolutive pathways.
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