Summary
Laboratory and field experiments on egg-laying preferences of cabbage root fly revealed differences between types of radish varieties which were expressed consistently in all experimental environments. First generation progenies showed responses to low selection pressure but expression of this response was considerably affected by the environment, even when environmental differences consisted only of replications of the same experiment. It is postulated that a genetic factor in the plant affects ontogeny-dependent preference by the fly, that the expression of this factor is itself highly affected by the environment, and that this may be maintained in radish as an adaptive polymorphism.
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References
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Crisp, P., Johnson, A., Ellis, P. et al. Genetical and environmental interactions affecting resistance in radish to cabbage root fly. Heredity 38, 209–218 (1977). https://doi.org/10.1038/hdy.1977.26
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DOI: https://doi.org/10.1038/hdy.1977.26