highly significantP = 4.58 × 10 −7
An analysis of gene expression considering all genes and DGRP lines revealed a highly significant five-way interaction among injury, diet, age, gene, and line (ANOVA, F 144,2736 = 1.72, P = 4.58 × 10 −7 ), with interaction meaning that the effect of one factor on gene expression depends on the level(s) or one or more other factors.