CHEMOTAXONOMIC STUDY OF SEED GLUCOSINOLATE COMPOSITION IN COINCYA ROUY (BRASSICACEAE)

A total of 68 populations belonging to the genus Coincya Rouy (Brassic aceae) from the Iberian Peninsula was examined for seed glucosinolate composition. The presence of progoitrin, epiprogoitrin, glucosinalbin and gluconapin was recorded plus a fifth glucosinalate that could not be identified. A geographical clinal variation between progoitrin and epiprogoitrin was observed in the more widespread taxa, C. monensis su bsp. orophila (Franco) Aedo, Leadlay & Munoz Garm. and G. monensis sub sp. cheiranthos var. recurvata (All.) Leadlay. The fewest types of glu cosinate were observed in taxa with morphological characters considere d more primitive, viz. subsp. hispida and var. recurvata. On the other hand, more complex and diverse composition was observed in the taxon with more advanced characters, viz. C. rupestris subsp. rupestris Port a & Rigo.