Data from: Cheaper isn’t always worse: more protective isolates of a defensive symbiont are less costly to the aphid host

Luis Cayetano, Lukas Rothacher, Jean-Christophe Simon, Christoph Vorburger & J.-C. Simon
Defences against parasites are typically associated with costs to the host that contribute to the maintenance of variation in resistance. This also applies to the defence provided by the facultative bacterial endosymbiont Hamiltonella defensa, which protects its aphid hosts against parasitoid wasps while imposing life-history costs. To investigate the cost–benefit relationship within protected hosts, we introduced multiple isolates of H. defensa to the same genetic backgrounds of black bean aphids, Aphis fabae, and we quantified...
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