Fig. 4

Differences between Sitobion avenae biotypes 1 and 3 in the distribution of Log₂ fold changes of common DEGs (a and b, for genes downregulated and upregulated, respectively) and specific DEGs (c and d, for genes downregulated and upregulated, respectively) in response to host plant transfer [Lines represent the relative density (amount) of genes corresponding to the fold changes indicated on the x-axis for biotype 1 (solid lines) and biotype 3 (dashed lines); the relatively higher density of genes at a low range of magnitudes of Log₂ fold change indicates a reduced scope for transcriptional plasticity; the shift of the distribution between biotypes is statistically significant for comparisons in both (c) and (d) based on the Wilcoxon rank-sum test]