Data from: Does phenotypic plasticity for adult size versus food level in Drosophila melanogaster evolve in response to adaptation to different rearing densities?

Recent studies using inbred lines of Drosophila have suggested that there
is extensive genetic variability for phenotypic plasticity of body size
versus food level. If true, we expect that the outcome of evolution at
very different food levels should yield genotypes whose adult sizes show
different patterns of phenotypic plasticity. We have tested this
prediction with six independent populations of Drosophila melanogaster
kept at extreme (low vs. high) densities for 125 generations. We found
that the phenotypic plasticity of body size versus food level is not
affected by selection or the presence of competitors of a different
genotype. However, we document increasing among population variation in
phenotypic plasticity due to random genetic drift. Several reasons are
explored to explain these results including the possibility that the use
of highly inbred lines to make inferences about the evolution of
genetically variable populations may be misleading.