The present disclosure provides Brassica oleracea plants exhibiting broad spectrum resistance to Xanthomonas campestris pv. campestris. Such plants may comprise novel introgressed genomic regions associated with disease resistance from Brassica oleracea var. capitata. In certain aspects, compositions, including novel polymorphic markers and methods for producing, breeding, identifying, and selecting plants or germplasm with a disease resistance phenotype are provided.
