ArticleBMC research notes2025
Genomic characterization of repetitive DNA and transposable elements in Dyckia (Pitcairnioideae) species.
Article in BMC research notes, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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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.
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7 authors.
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Abstract
objectiveRepetitive DNA comprises the majority of nuclear genomes in eukaryotes and is critical for genome stability, gene regulation and evolutionary innovation. Yet, most genomic surveys focus on lowcopy regions, leaving repeats underexplored. Here, we assess how repetitive elements shape genomic diversity and rapid radiation in Dyckia (Bromeliaceae) by characterizing the abundance, composition and variability of major repeat families using lowcoverage whole-genome sequencing and the RepeatExplorer2 pipeline. RESULTS DESCRIPTION: A substantial proportion of Dyckia genome consists of repetitive DNA, reaching ~ 71% in D. densiflora, D. elata, and D. consimilis. Notable interspecific and intraspecific variation was observed, with D. consimilis ranging from 50.3 to 69.1%. Satellite DNA, though present in all species, varied in abundance (0.1-4.7%), indicating heterochromatin flexibility. Ty3/Gypsy and Ty1/Copia LTR retrotransposons dominate the repeatome, with lineage-specific expansions of Tekay and Ogre elements. Despite general conservation, population-level differences in repeat composition suggest a role in genome restructuring and phenotypic plasticity. These patterns point to repeat dynamics as a key driver of genome evolution, taxonomic complexity, and ecological adaptability in Dyckia.
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