Broccoli (Brassica oleracea L. Italica Group) breeding lines OSU CR-2 to OSU CR-8 were selected and tested for clubroot (Plasmodiophora brassicae Wor.) resistance in the field at Corvallis and Tillamook, Oregon. All of the lines have shown resistance to downy mildew [Peronospora parasitica (Fr.) Tul.] in the field at Corvallis, and most have useful horticultural characteristics and are potentially useful as parents for F1 hybrids.