ArticleBMC plant biology2011
Dynamic distribution patterns of ribosomal DNA and chromosomal evolution in Paphiopedilum, a lady's slipper orchid.
Article in BMC plant biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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30 citing papers in PubMed, 78 citations in OpenAlex.
- Reticulate evolutionary history underpins a revised generic circumscription of Paphiopedilum (Orchidaceae): insights from integrative phylogenomics and historical biogeography.BMC plant biology · 2025Article
- Comparative Analysis of the Chloroplast Genomes of Cypripedium: Assessing the Roles of SSRs and TRs in the Non-Coding Regions of LSC in Shaping Chloroplast Genome Size.International journal of molecular sciences · 2025Article
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- The Dynamic Interplay Between Ribosomal DNA and Transposable Elements: A Perspective From Genomics and Cytogenetics.Molecular biology and evolution · 2024Article
- Fluorescence in situ Hybridization Analysis of Oligonucleotide 5S Ribosomal DNA, 45S Ribosomal DNA, and (TTTAGGG)3 Locations in Gloriosa superba L.Cytogenetic and genome research · 2024Article
- Investigating the Origin and Evolution of PolyploidPlants (Basel, Switzerland) · 2023Article
- The Chromosome Number and rDNA Loci Evolution inInternational journal of molecular sciences · 2022Article
- Molecular and Cytogenetic Analysis of rDNA Evolution in Crepis Sensu Lato.International journal of molecular sciences · 2022Article
- Distribution patterns of rDNA loci in theComparative cytogenetics · 2022Article
- Species Phylogeny versus Gene Trees: A Case Study of an Incongruent Data Matrix Based onInternational journal of molecular sciences · 2021Article
- Molecular Evolution and Organization of Ribosomal DNA in the Hawkweed Tribe Hieraciinae (Cichorieae, Asteraceae).Frontiers in plant science · 2021Article
- Comparative chromosome studies in species of subtribe Orchidinae (Orchidaceae).Comparative cytogenetics · 2021Article
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- Cytogenetic and molecular genotyping in the allotetraploid Festuca pratensis × Lolium perenne hybrids.BMC genomics · 2019Article
- Low coverage sequencing for repetitive DNA analysis in Passiflora edulis Sims: citogenomic characterization of transposable elements and satellite DNA.BMC genomics · 2019Article
- Karyotype analysis of eight cultivated Allium species.Journal of applied genetics · 2019Article
- The Repetitive DNA Composition in the Natural Pesticide ProducerFrontiers in plant science · 2019Article
- Satellite DNA in Paphiopedilum subgenus Parvisepalum as revealed by high-throughput sequencing and fluorescent in situ hybridization.BMC genomics · 2018Article
- Taxonomic placement of Paphiopedilum rungsuriyanum (Cypripedioideae; Orchidaceae) based on morphological, cytological and molecular analyses.Botanical studies · 2017Article
- Molecular cytogenetic characterization and comparison of the two cultivatedComparative cytogenetics · 2017Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPaphiopedilum is a horticulturally and ecologically important genus of ca. 80 species of lady's slipper orchids native to Southeast Asia. These plants have long been of interest regarding their chromosomal evolution, which involves a progressive aneuploid series based on either fission or fusion of centromeres. Chromosome number is positively correlated with genome size, so rearrangement processes must include either insertion or deletion of DNA segments. We have conducted Fluorescence In Situ Hybridization (FISH) studies using 5S and 25S ribosomal DNA (rDNA) probes to survey for rearrangements, duplications, and phylogenetically-correlated variation within Paphiopedilum. We further studied sequence variation of the non-transcribed spacers of 5S rDNA (5S-NTS) to examine their complex duplication history, including the possibility that concerted evolutionary forces may homogenize diversity.
results5S and 25S rDNA loci among Paphiopedilum species, representing all key phylogenetic lineages, exhibit a considerable diversity that correlates well with recognized evolutionary groups. 25S rDNA signals range from 2 (representing 1 locus) to 9, the latter representing hemizygosity. 5S loci display extensive structural variation, and show from 2 specific signals to many, both major and minor and highly dispersed. The dispersed signals mainly occur at centromeric and subtelomeric positions, which are hotspots for chromosomal breakpoints. Phylogenetic analysis of cloned 5S rDNA non-transcribed spacer (5S-NTS) sequences showed evidence for both ancient and recent post-speciation duplication events, as well as interlocus and intralocus diversity.
conclusionsPaphiopedilum species display many chromosomal rearrangements--for example, duplications, translocations, and inversions--but only weak concerted evolutionary forces among highly duplicated 5S arrays, which suggests that double-strand break repair processes are dynamic and ongoing. These results make the genus a model system for the study of complex chromosomal evolution in plants.
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