ArticleGenetics2004
Dynamic changes in the distribution of a satellite homologous to intergenic 26-18S rDNA spacer in the evolution of Nicotiana.
Article in Genetics, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.
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Who cites it
35 citing papers in PubMed.
- Independent evolution of satellite DNA sequences in homologous sex chromosomes of Neotropical armored catfish (Harttia).Communications biology · 2025Article
- Genomic and cytogenetic analyses reveal satellite repeat signature in allotetraploid okra (Abelmoschus esculentus).BMC plant biology · 2024Article
- Comparative analysis of repetitive DNA in dysploid and non-dysploid Phaseolus beans.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2023Article
- Study and Physical Mapping of the Species-Specific Tandem Repeat CS-237 Linked with 45S Ribosomal DNA Intergenic Spacer inPlants (Basel, Switzerland) · 2022Article
- Chromosomal Mapping of Tandem Repeats Revealed Massive Chromosomal Rearrangements and Insights IntoFrontiers in plant science · 2021Article
- Personal Perspectives on Plant Ribosomal RNA Genes Research: From Precursor-rRNA to Molecular Evolution.Frontiers in plant science · 2021Review
- Intragenomic heterogeneity of intergenic ribosomal DNA spacers in Cucurbita moschata is determined by DNA minisatellites with variable potential to form non-canonical DNA conformations.DNA research : an international journal for rapid publication of reports on genes and genomes · 2019Article
- Islands of retroelements are major components of Drosophila centromeres.PLoS biology · 2019Article
- Evolutionary trends in animal ribosomal DNA loci: introduction to a new online database.Chromosoma · 2018Article
- Pilot satellitome analysis of the model plant,Comparative cytogenetics · 2018Article
- Gene conversion events and variable degree of homogenization of rDNA loci in cultivars of Brassica napus.Annals of botany · 2017Article
- NaturalFrontiers in plant science · 2017Review
- Distribution of new satellites and simple sequence repeats in annual and perennial Glycine species.Botanical studies · 2015Article
- Differential amplification of satellite PaB6 in chromosomally hypervariable Prospero autumnale complex (Hyacinthaceae).Annals of botany · 2014Article
- Molecular organization of the 25S-18S rDNA IGS of Fagus sylvatica and Quercus suber: a comparative analysis.PloS one · 2014Article
- Whole genome profiling physical map and ancestral annotation of tobacco Hicks Broadleaf.The Plant journal : for cell and molecular biology · 2013Article
- Tobacco karyotyping by accurate centromere identification and novel repetitive DNA localization.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2013Article
- Tandem repeats derived from centromeric retrotransposons.BMC genomics · 2013Article
- Next generation sequencing analysis reveals a relationship between rDNA unit diversity and locus number in Nicotiana diploids.BMC genomics · 2012Article
- Physical mapping of 5S and 45S rDNA in Chrysanthemum and related genera of the Anthemideae by FISH, and species relationships.Journal of genetics · 2012Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
An approximately 135-bp sequence called the A1/A2 repeat was isolated from the transcribed region of the 26-18S rDNA intergenic spacer (IGS) of Nicotiana tomentosiformis. Fluorescence in situ hybridization (FISH) and Southern blot analysis revealed its occurrence as an independent satellite (termed an A1/A2 satellite) outside of rDNA loci in species of Nicotiana section Tomentosae. The chromosomal location, patterns of genomic dispersion, and copy numbers of its tandemly arranged units varied between the species. In more distantly related Nicotiana species the A1/A2 repeats were found only at the nucleolar organizer regions (NOR). There was a trend toward the elimination of the A1/A2 satellite in N. tabacum (tobacco), an allotetraploid with parents closely related to the diploids N. sylvestris and N. tomentosiformis. This process may have already commenced in an S(3) generation of synthetic tobacco. Cytosine residues in the IGS were significantly hypomethylated compared with the A1/A2 satellite. There was no clear separation between the IGS and satellite fractions in sequence analysis of individual clones and we found no evidence for CG suppression. Taken together the data indicate a dynamic nature of the A1/A2 repeats in Nicotiana genomes, with evidence for recurrent integration, copy number expansions, and contractions.
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