Summary of PERMANOVAs assessing overall cross-peak differences in each of the three Rt ranges in rectal gland volatiles in the five data sets.

Analysis I assessed the differences across all 24 lines. If that term was significant, Analysis II, which excluded S06, then assessed the differences due to locality of origin and lines within localities. F ratios are shown with degrees of freedom in brackets. * p < 0.05; ** p < 0.01; *** p < 0.001.