Repeated co-option of a conserved gene regulatory module underpins the evolution of the crustacean carapace, insect wings and other flat outgrowths


Journal article


Shiga, Kato, Aragane-Nomura, Haraguchi, Saridaki, Watanabe, Iguchi, Yamagata, Averof
bioRxiv, 2017

DOI: doi.org/10.1101/160010

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APA   Click to copy
Shiga, Kato, Aragane-Nomura, Haraguchi, Saridaki, Watanabe, … Averof. (2017). Repeated co-option of a conserved gene regulatory module underpins the evolution of the crustacean carapace, insect wings and other flat outgrowths. BioRxiv. https://doi.org/doi.org/10.1101/160010


Chicago/Turabian   Click to copy
Shiga, Kato, Aragane-Nomura, Haraguchi, Saridaki, Watanabe, Iguchi, Yamagata, and Averof. “Repeated Co-Option of a Conserved Gene Regulatory Module Underpins the Evolution of the Crustacean Carapace, Insect Wings and Other Flat Outgrowths.” bioRxiv (2017).


MLA   Click to copy
Shiga, et al. “Repeated Co-Option of a Conserved Gene Regulatory Module Underpins the Evolution of the Crustacean Carapace, Insect Wings and Other Flat Outgrowths.” BioRxiv, 2017, doi:doi.org/10.1101/160010.


BibTeX   Click to copy

@article{shiga2017a,
  title = {Repeated co-option of a conserved gene regulatory module underpins the evolution of the crustacean carapace, insect wings and other flat outgrowths},
  year = {2017},
  journal = {bioRxiv},
  doi = {doi.org/10.1101/160010},
  author = {Shiga and Kato and Aragane-Nomura and Haraguchi and Saridaki and Watanabe and Iguchi and Yamagata and Averof}
}

Abstract

Summary statement The genes vestigial, scalloped and wingless comprise a conserved regulatory module that was co-opted repeatedly for the evolution of flat structures, such as insect wings, and crustacean carapace, tergites and coxal plates. Summary How novelties arise is a key question in evolutionary developmental biology. The crustacean carapace is a novelty that evolved in the early Cambrian. In an extant crustacean, Daphnia magna, the carapace grows from the body wall as a double-layered sheet with a specialized margin. We show that the growing margin of this carapace expresses vestigial, scalloped and wingless, genes that are known to play key roles in regulating growth at the insect wing margin. RNAi-mediated knockdown of scalloped and wingless impair carapace development, indicating that carapace and wing might share a common mechanism for margin outgrowth. However, carapace and wings arise in different parts of the body and their margins have different orientations, arguing that these structures have independent evolutionary origins. We show that scalloped is also expressed at the margin of unrelated flat outgrowths (tergites and coxal plates) in the distantly related crustacean Parhyale hawaiensis. Based on these observations, we propose that the vestigial-scalloped-wingless gene module has a common role in the margin of diverse flat structures, originating before the divergence of major crustacean lineages and the emergence of insects. Repeated co-option of this module occurred independently in the carapace, wing and other flat outgrowths, underpinning the evolution of distinct novelties in different arthropod lineages.





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