Evidence map›Paper›PMID 17200233›Full record

ArticleGenome research2007

Highly efficient concerted evolution in the ribosomal DNA repeats: total rDNA repeat variation revealed by whole-genome shotgun sequence data.

Austen R D Ganley, Takehiko Kobayashi

Abstract readComparative Study
In one paragraph

Article in Genome research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 168 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
168citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

168 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Guidelines for the Choice of Sequences for Molecular Plant Taxonomy.Methods in molecular biology (Clifton, N.J.) · 2021
    Guideline
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  9. Regulation of nucleolar dominance through allopolyploidization of hexaploid wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025
    Article
  10. From minor loci to major players? Satellite DNA diversification in Crepis sensu stricto.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025
    Article
  11. Article
  12. Article
  13. Extensive nrDNA Polymorphism inPlants (Basel, Switzerland) · 2025
    Article
  14. Article
  15. Assessing Human Ribosomal DNA Variation and Its Association With Phenotypic Outcomes.BioEssays : news and reviews in molecular, cellular and developmental biology · 2025
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

108 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Austen R D GanleyNational Institute for Basic Biology, Okazaki, 444-8585, Japan. gausten@lab.nig.ac.jp
Takehiko Kobayashi

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Repeat families within genomes are often maintained with similar sequences. Traditionally, this has been explained by concerted evolution, where repeats in an array evolve "in concert" with the same sequence via continual turnover of repeats by recombination. Another form of evolution, birth-and-death evolution, can also explain this pattern, although in this case selection is the critical force maintaining the repeats. The level of intragenomic variation is the key difference between these two forms of evolution. The prohibitive size and repetitive nature of large repeat arrays have made determination of the absolute level of intragenomic repeat variability difficult, thus there is little evidence to support concerted evolution over birth-and-death evolution for many large repeat arrays. Here we use whole-genome shotgun sequence data from the genome projects of five fungal species to reveal absolute levels of sequence variation within the ribosomal RNA gene repeats (rDNA). The level of sequence variation is remarkably low. Furthermore, the polymorphisms that are detected are not functionally constrained and seem to exist beneath the level of selection. These results suggest the rDNA is evolving via concerted evolution. Comparisons with a repeat array undergoing birth-and-death evolution provide a clear contrast in the level of repeat array variation between these two forms of evolution, confirming that the rDNA indeed does evolve via concerted evolution. These low levels of intra-genomic variation are consistent with a model of concerted evolution in which homogenization is very rapid and efficiently maintains highly similar repeat arrays.

Indexed as

Evolution, MolecularAspergillus nidulansCryptococcus neoformansDNA, FungalDNA, RibosomalFungiGenetic VariationGenome, FungalModels, GeneticMutationPolymorphism, GeneticRepetitive Sequences, Nucleic AcidSaccharomycesSaccharomyces cerevisiaeSaccharomycetalesSpecies SpecificityDNA, FungalDNA, Ribosomal

Identifiers

PMID17200233
PMCPMC1781350

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.