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- W3031489035 abstract "Abstract Background Gene duplication events play an important role in the evolution and adaptation of organisms. Duplicated genes can arise through different mechanisms, including whole-genome duplications (WGDs). Recently, WGD was suggested to be an important driver of evolution, also in hexapod animals. Results Here, we analyzed 20 high-quality hexapod genomes using whole-paranome distributions of estimated synonymous distances ( K S ), patterns of within-genome co-linearity, and phylogenomic gene tree-species tree reconciliation methods. We observe an abundance of gene duplicates in the majority of these hexapod genomes, yet we find little evidence for WGD. The majority of gene duplicates seem to have originated through small-scale gene duplication processes. We did detect segmental duplications in six genomes, but these lacked the within-genome co-linearity signature typically associated with WGD, and the age of these duplications did not coincide with particular peaks in K S distributions. Furthermore, statistical gene tree-species tree reconciliation failed to support all but one of the previously hypothesized WGDs. Conclusions Our analyses therefore provide very limited evidence for WGD having played a significant role in the evolution of hexapods and suggest that alternative mechanisms drive gene duplication events in this group of animals. For instance, we propose that, along with small-scale gene duplication events, episodes of increased transposable element activity could have been an important source for gene duplicates in hexapods." @default.
- W3031489035 created "2020-06-05" @default.
- W3031489035 creator A5023955946 @default.
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- W3031489035 date "2020-05-27" @default.
- W3031489035 modified "2023-09-26" @default.
- W3031489035 title "Multi-faceted analysis provides little evidence for recurrent whole-genome duplications during hexapod evolution" @default.
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- W3031489035 doi "https://doi.org/10.1186/s12915-020-00789-1" @default.
- W3031489035 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7251882" @default.
- W3031489035 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32460826" @default.
- W3031489035 hasPublicationYear "2020" @default.
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