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Beetle horns evolved from wing serial homologs

ABSTRACT: Beetle horns evolved from wing serial homologs

PROVIDER: PRJNA565591 | ENA |

REPOSITORIES: ENA

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Beetle horns evolved from wing serial homologs

Project description:Understanding how novel complex traits originate is a foundational challenge in evolutionary biology. Yet how descent with modification in developmental evolution may lead to morphological innovation remains poorly understood. We investigated the origin of thoracic horns in scarabaeine beetles, one of the most dramatic classes of secondary sexual traits in the animal kingdom. We show that thoracic horns derive from bilateral source tissues, that diverse wing genes are functionally required for instructing this process, and that in the absence of Hox-input thoracic horn primordia transform to contribute to ectopic wings. Once induced, however, the transcriptional profile of thoracic horns diverges markedly from that of wings and other wing serial homologs. Our results provide evidence for the serial homology between thoracic horns and insects wings, and suggest that other insect innovations may similarly derive from wing serial homologs and the concomitant recruitment of diverse genes from outside a wing formation context.

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