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
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| 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
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| URL | |
| Keywords | Keywords not found |
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