The evaluation of some Brassica oleracea L. lines as a source of resistance to downy mildew (Peronospora parasitica Pers. ex Fr.) for cauliflower breeding.

摘要

A backcrossing programme initiated in 1990 with a view to the introduction of P. parasitica resistance into susceptible cauliflower lines with good quality traits is briefly outlined. The following were used as sources of resistance: B. oleracea var. botrytis PI231210 and PI189028, B. oleracea var. capitata PI246063, PI246077 and PI245013, the broccoli inbred No.5 and the broccoli-cauliflower line No.8 of Polish origin. All these material were resistant to 3 isolates of P. parasitica from the mainregions of cabbage cultivation in Poland.