If divergence in glucosinolate tolerance is mapped globally for *P. rapae*, where might divergence rates in detoxifying pathways be highest?

In agricultural zones where populations consume varied crops and introduced weeds

The comparison between different feeding environments suggests that the intensity of selection pressures related to diet drives genetic divergence. In agricultural zones, *P. rapae* populations are exposed to a wider array of brassicas—both cultivated crops and introduced weeds—each potentially possessing unique profiles of glucosinolate defenses. This continuous exposure to novel or varied chemical challenges means that the genes governing detoxification enzymes are constantly being selected upon, leading to measurable, faster rates of genetic divergence in these pathways compared to populations in more isolated areas feeding on less diverse, stable host plants.