Significant differences in genera proportions between NOR- and NOD-fostered pups. This is a heatmap showing bacterial genera with statistically significant differences in proportion (P < 0.05 after FDR correction) between NOR- and NOD-fostered mice at 4 weeks of age. Color shading is based on the proportion of each genera within fecal samples from each mouse, with the darkest color being the highest observed proportion (by time point) and white being zero (that is, not present). Mouse ID is shown above each column with the following naming convention: Nursing Mother-Pup Strain (where R = NOR and D = NOD). (A) Differences at 4 weeks of age. (B) Differences at 32 weeks of age.