Caddisfly H-fibroin Gene Evolves Rapidly While Maintaining Silk Adhesive Properties

Researchers from the University of Utah and Brigham Young University have identified that the H-fibroin gene in caddisflies undergoes rapid evolutionary changes while maintaining the adhesive properties of the silk it produces. This protein allows the freshwater insects to construct protective cases and capture nets that remain functional in flowing water environments.

The study examines how the genetic sequence of the H-fibroin gene shifts over time despite the consistent performance of the resulting bioadhesive. By analyzing the silk production process, the team observed that the insect’s ability to anchor its structures in aquatic habitats persists even as the underlying genetic code experiences significant variation. These findings provide insight into how biological materials retain their mechanical utility throughout the evolutionary process.

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Date: July 9, 2026

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GOAI