ArticleAnnals of botany2020
Genome size variation at constant chromosome number is not correlated with repetitive DNA dynamism in Anacyclus (Asteraceae).
Article in Annals of botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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20 citing papers in PubMed, 45 citations in OpenAlex.
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- Tracing the Evolution of the Angiosperm Genome from the Cytogenetic Point of View.Plants (Basel, Switzerland) · 2022Review
- Morphological and Genome-Wide Evidence of Homoploid Hybridisation inPlants (Basel, Switzerland) · 2022Article
- Evolutionary Dynamics of the Repeatome Explains Contrasting Differences in Genome Sizes and Hybrid and Polyploid Origins of Grass Loliinae Lineages.Frontiers in plant science · 2022Article
- Measuring the Invisible: The Sequences Causal of Genome Size Differences in Eyebrights (Frontiers in plant science · 2022Article
- The relationship between transposable elements and ecological niches in the Greater Cape Floristic Region: A study on the genusFrontiers in plant science · 2022Article
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- The nature of intraspecific and interspecific genome size variation in taxonomically complex eyebrights.Annals of botany · 2021Article
- Comparative phylogenetics of repetitive elements in a diverse order of flowering plants (Brassicales).G3 (Bethesda, Md.) · 2021Article
- A phylogenetic analysis of Momordica (Cucurbitaceae) in India based on karyo-morphology, nuclear DNA content and rDNA ITS1-5.8S-ITS2 sequences.Protoplasma · 2021Article
- Horizontally Acquired nrDNAs Persist in Low Amounts in HostFrontiers in plant science · 2021Article
- Genome Size Doubling Arises From the Differential Repetitive DNA Dynamics in the GenusFrontiers in genetics · 2021Article
- Integrated Genomic Analyses From Low-Depth Sequencing Help Resolve Phylogenetic Incongruence in the Bamboos (Poaceae: Bambusoideae).Frontiers in plant science · 2021Article
- Characterization and Dynamics of Repeatomes in Closely Related Species ofFrontiers in plant science · 2020Article
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Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsChanges in the amount of repetitive DNA (dispersed and tandem repeats) are considered the main contributors to genome size variation across plant species in the absence of polyploidy. However, the study of repeatome dynamism in groups showing contrasting genomic features and complex evolutionary histories is needed to determine whether other processes underlying genome size variation may have been overlooked. The main aim here was to elucidate which mechanism best explains genome size evolution in Anacyclus (Asteraceae).
methodsUsing data from Illumina sequencing, we analysed the repetitive DNA in all species of Anacyclus, a genus with a reticulate evolutionary history, which displays significant genome size and karyotype diversity albeit presenting a stable chromosome number. KEY
resultsBy reconstructing ancestral genome size values, we inferred independent episodes of genome size expansions and contractions during the evolution of the genus. However, analysis of the repeatome revealed a similar DNA repeat composition across species, both qualitative and quantitative. Using comparative methods to study repeatome dynamics in the genus, we found no evidence for repeat activity causing genome size variation among species.
conclusionsOur results, combined with previous cytogenetic data, suggest that genome size differences in Anacyclus are probably related to chromosome rearrangements involving losses or gains of chromosome fragments, possibly associated with homoploid hybridization. These could represent balanced rearrangements that do not disrupt gene dosage in merged genomes, for example via chromosome segment exchanges.
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