Biological implications of a detailed repeat annotation in Octopus vulgaris

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ID: 316008
2026
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Abstract
Octopuses are phenotypically distinctive organisms, and recent genomic work raises questions about the contributions of transposable elements (TE) to their genomic architecture. We leveraged a robust repeat annotation pipeline, in combination with manual and automated curatorial techniques, to produce a more comprehensive repeat annotation of Octopus vulgaris. This revealed that ∼66% of the genome are repeats, in contrast to previous estimates of 43-50% in closely related octopus species. Whereas previous studies of TE expansion in Octopus bimaculoides identified two bursts of activity, 25 and 56 MYA, our re-annotation revealed four such expansions at 18, 25, 33, and 56 MYA. We further identified a landscape of TE hot- and cold spots. This much refined TE timescape and landscape will serve as a useful basis for understanding TE contributions to O. vulgaris evolution, and also for identifying factors contributing to variation in the TE community across genomic space and evolutionary time.
Reference Key
openalex_W7163662324 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Maegwin Bonar, Tyler A. Elliott, Mirza A M Ahmadi, Karl Cottenie, Stefan Linquist
Journal genome biology and evolution
Year 2026
DOI
10.1093/gbe/evag137
URL
Keywords Keywords not found

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