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Related Experiment Video

Updated: Sep 2, 2025

Author Spotlight: Advanced Enteroid Model for Studying Host-Pathogen Interactions

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Published on: April 5, 2024

The evolution of host specialization in an insect pathogen.

Elisa Visher¹, Lawrence Uricchio², Lewis Bartlett³

¹Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA.

Evolution; International Journal of Organic Evolution

|August 10, 2022

Summary

Parasite infectivity evolves towards specialization, but fitness components like productivity and infectivity can evolve independently. Specialization is a complex, polygenic trait influenced by multiple evolutionary factors.

Keywords:

Experimental evolution host range host-parasite interactions specialization

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Oral Bacterial Infection and Shedding in Drosophila melanogaster

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Area of Science:

Evolutionary biology
Host-parasite interactions
Population genetics

Background:

Niche breadth coevolution is key to biodiversity and disease dynamics.
Understanding parasite infectivity evolution, costs, and genetic basis is crucial.

Purpose of the Study:

Investigate the evolution of parasite specialization using experimental evolution.
Analyze the dynamics of host genotype specialization and fitness trade-offs.

Main Methods:

Serial passage of Plodia interpunctella granulosis virus on inbred host populations.
Time-series collection of phenotypic and genetic data.
Examination of two key fitness components: productivity and infectivity.

Main Results:

The virus consistently evolved increased specialization.
Fitness components evolved independently, allowing specialization in either productivity or infectivity.
Specialization was identified as a polygenic trait influenced by multiple evolutionary mechanisms.

Conclusions:

Parasite specialization is a dynamic process with independent evolution of fitness traits.
Polygenic inheritance underlies specialization, highlighting complex evolutionary pathways.
Findings inform co-existence, diversification, and infectious disease management strategies.