DETECTION AND ANALYSIS OF QTLS BASED ON RAPD MARKERS FOR POLYGENIC RESISTANCE TO PLASMODIOPHORA-BRASSICAE WORON IN BRASSICA-OLERACEA L

Resistance to Plasmodiophora brassicae Woron, the causal fungus of clu broot, was examined in an F-2 population of a cross between a clubroot -resistant kale (Brassica oleracea L. var, acephala) and a susceptible cauliflower (Brassica oleracea L. var. botrytis). QTL detection was p erformed with RAPD markers. Two resistance notations, carried out at d ifferent times after inoculation, were used. Three markers were associ ated with these two notations and three were specifically linked to on ly one notation. QTL analysis the existence of at least two genetic me chanisms implicated in the resistance phenomenon.