Glucosinolate levels in leaves were determined in a collection of 113 varieties of turnip greens (Brassica rapa L.) from northwestern Spain grown at two sites. Sixteen glucosinolates; belonging to the three chemical classes; were detected in the whole collection. For gluconapoleiferin; glucoalyssin; 4-
hydroxyglucobrassicin; and glucoiberverin; analyses of variance showed significant differences among varieties (Padilla et al. 2007)