ArticleAnnals of botany2021
Concerted and birth-and-death evolution of 26S ribosomal DNA in Camellia L.
Article in Annals of botany, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 13 citations in OpenAlex.
- Comparative synthesis of tandem repeats in the control region of Epinephelus mitogenomes (Peciformes: Epinephelidae).Genetics and molecular biology · 2026Article
- Participation of Wild Species GenusPlants (Basel, Switzerland) · 2025Article
- Genome Variability in Artificial Allopolyploid Hybrids ofInternational journal of molecular sciences · 2024Article
- The Dynamic Interplay Between Ribosomal DNA and Transposable Elements: A Perspective From Genomics and Cytogenetics.Molecular biology and evolution · 2024Article
- Article
- Hybridization and diversity of aquatic macrophyte Sparganium L. (Typhaceae) as revealed by high-throughput nrDNA sequencing.Scientific reports · 2022Article
- New Insights into the Genomic Structure ofPlants (Basel, Switzerland) · 2022Article
- The specific DNA barcodes based on chloroplast genes for species identification ofPhysiology and molecular biology of plants : an international journal of functional plant biology · 2022Article
- Conservation of anFrontiers in plant science · 2022Article
Corrections and comments
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Authors and funding
9 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsThe ribosomal DNA (rDNA) gene family, encoding ribosomal RNA (rRNA), has long been regarded as an archetypal example illustrating the model of concerted evolution. However, controversy is arising, as rDNA in many eukaryotic species has been proved to be polymorphic. Here, a metagenomic strategy was applied to detect the intragenomic polymorphism as well as the evolutionary patterns of 26S rDNA across the genus Camellia.
methodsDegenerate primer pairs were designed to amplify the 26S rDNA fragments from different Camellia species. The amplicons were then paired-end sequenced on the Illumina MiSeq platform. KEY
resultsAn extremely high level of rDNA polymorphism existed universally in Camellia. However, functional rDNA was still the major component of the family, and was relatively conserved among different Camellia species. Sequence variations mainly came from rRNA pseudogenes and favoured regions that are rich in GC. Specifically, some rRNA pseudogenes have existed in the genome for a long time, and have even experienced several expansion events, which has greatly enriched the abundance of rDNA polymorphism.
conclusionsCamellia represents a group in which rDNA is subjected to a mixture of concerted and birth-and-death evolution. Some rRNA pseudogenes may still have potential functions. Conversely, when released from selection constraint, they can evolve in the direction of decreasing GC content and structural stability through a methylation-induced process, and finally be eliminated from the genome.
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