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.

The present invention relates to clubroot resistance in Brassica. More specifically, the invention relates to the CRT clubroot resistance gene, as well as to methods to create clubroot resistant Brassica plants.

The present invention relates to Brassica oleracea plants resistant to the plant pest diamondback moth Plutella xylostella and, additionally, tolerant to the plant pathogen Xanthomonas campestris pv. campestris. The present invention further relates to methods for identifying the present plants and nucleic acid sequences allowing characterizing, or identifying, the present plants. Specifically, the present invention relates to Brassica oleracea plants resistant to the diamondback moth Plutella xylostella and the plant pathogen Xanthomonas campestris campestris, wherein said resistance to the diamondback moth Plutella xylostella and said tolerance to the plant pathogen Xanthomonas campestris campestris are obtainable from a Brassica oleracea plant deposited under deposit number NCIMB 43822.

The present invention relates to resistance to Xanthomonas campestris pv. campestris (Xcc) in cauliflower. According to the invention, the resistance is provided by DNA sequences, introgressed from a green cauliflower at specific loci in the genome of a white cauliflower. The introgressed sequences can be present homozygously or heterozygously in the genome of the white cauliflower, and they confer resistance to Xcc. The invention further relates to part of these cauliflowers, to seeds, to the progeny of these cauliflowers, and to method for producing cauliflowers resistant to Xcc.