Co-option of wing-patterning genes underlies the evolution of the treehopper helmet
| Autor: | Elizabeth L. Jockusch, Cera R Fisher, Jill L. Wegrzyn |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Natural selection Wing Ecology biology media_common.quotation_subject Novelty Morphology (biology) Insect biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Evolutionary biology Evolutionary developmental biology human activities Gene Treehopper Ecology Evolution Behavior and Systematics 030304 developmental biology media_common |
| Zdroj: | Nature Ecology & Evolution. 4:250-260 |
| ISSN: | 2397-334X |
| DOI: | 10.1038/s41559-019-1054-4 |
| Popis: | Understanding the origin of novelty is a key question in evolutionary developmental biology. In arthropods, the body wall has served as a repeated source of morphological novelty. In treehoppers, an ancestrally flat part of the dorsal body wall (the pronotum) was transformed into a three-dimensional structure (the helmet), which was subsequently moulded by natural selection into diverse shapes. Here, we test three hypotheses for the developmental origin of the helmet by comparing body-region transcriptomes in a treehopper and a leafhopper that retains more ancestral morphology. In leafhoppers, pronotal gene expression is most similar to that of its serial homologue, the mesonotum. By contrast, in treehoppers, helmet gene expression is most similar to that of wings, supporting the wing-patterning network co-option hypothesis for the origin of the helmet. These results suggest that serial homologues may diverge evolutionarily through replacement of, rather than tinkering with, their ancestrally shared patterning network. |
| Databáze: | OpenAIRE |
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