ArticlebioRxiv : the preprint server for biology2026
Parasite defense covaries with reproductive timing, not with resistance.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Parasite defense is the ability of a host to minimize fitness loss to parasites, and it is among the most variable phenotypes in natural populations. We expect this variation in defense to facilitate rapid adaptation under parasite-mediated selection. What we do not know is what traits are most likely to evolve in response to this selection. A common assumption is that the most defended hosts are the most resistant, meaning they limit the establishment and growth of infecting parasites. Under this assumption, resistance traits should evolve readily under parasite selection. Resistance is, however, just one of many strategies hosts use to defend against parasites, and it does not consistently covary with parasite defense. We accordingly ask: which host traits covary with parasite defense and are thus likely to respond to parasite selection? We use controlled exposures to characterize genetic variation in defense of the nematode
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