Received for publication 13 Nov. 1984. Published as Technical Paper No. 7341, Oregon Agr. Expt. Sta. The authors wish to acknowledge the assistance of R.L. Gabrielson, Northwest Washington Res. and Ext. Center, and P.H. Williams, Univ. of Wisconsin, in the evaluation of clubroot resistance, and the assistance of Georgia Stem, Goldsmith’s Seeds, Inc., in the evaluation of selfincompatibility. The provision of the source of downy mildew resistance by the USDA Regional Plant Introduction Sta., Geneva, NY, also is gratefully acknowledged. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.