Xanthomonas campestris pv. campestris resistant Brassica plant homozygously comprising in its genome a Quantitative Trait Locus 1 (QTL1) and a Quantitative Trait Locus 2 (QTL2) of a plant with deposit number NCIMB 41553; said Quantitative Trait Locus 1 (QTL1) is characterized by RAMP markers consisting of a fragment of 158 to 162 bp with primer combination SEQ ID No: 1 and primer 6; a fragment of 283 to 287 bp with primer combination SEQ ID No: 2 and primer 6; a fragment of 370 to 374 bp with primer combination SEQ ID No: 3 and primer 6; and a fragment of 41 to 45 bp with primer combination SEQ ID No: 4 and primer 6; and said Quantitative Trait Locus 2 (QTL2) is characterized by RAMP markers consisting of a fragment of 88 to 92 bp with primer combination SEQ ID No: 5 and primer 6; a fragment of 125 to 129 bp with primer combination SEQ ID No: 6 and primer 6; a fragment of 334 to 338 bp with primer combination SEQ ID No: 7 and primer 6; and a fragment of 47 to 51 bp with primer combination SEQ ID No: 8 and primer 6; wherein primer 6 denotes Operon RAPD ® 10-mer kits A-01 to BH20; and wherein said Xanthomonas campestris pv. Campestris resistant Brassica plant is obtained by a method comprising: - providing Xanthomonas campestris pv. Campestris resistant Brassica plant with deposit number NCIMB 41553; - introgressing of, or genomically combining, Quantitative Trait Locus 1 (QTL1) and Quantitative Trait Locus 2 (QTL2) from NCIMB 41553 in a Brassica acceptor plant using isolated genomic material of the acceptor plant and SEQ ID Nos 1 to 8 and RAPD primers from Operon RAPD 10-mer kits A-01 - BH-20 for identifying QTL 1 and QTL 2. said Quantitative Trait Locus 1 (QTL1) is characterized by RAMP markers consisting of a fragment of 158 to 162 bp with primer combination SEQ ID No: 1 and primer 6; a fragment of 283 to 287 bp with primer combination SEQ ID No: 2 and primer 6; a fragment of 370 to 374 bp with primer combination SEQ ID No: 3 and primer 6; and a fragment of 41 to 45 bp with primer combination SEQ ID No: 4 and primer 6; and said Quantitative Trait Locus 2 (QTL2) is characterized by RAMP markers consisting of a fragment of 88 to 92 bp with primer combination SEQ ID No: 5 and primer 6; a fragment of 125 to 129 bp with primer combination SEQ ID No: 6 and primer 6; a fragment of 334 to 338 bp with primer combination SEQ ID No: 7 and primer 6; and a fragment of 47 to 51 bp with primer combination SEQ ID No: 8 and primer 6; wherein primer 6 denotes Operon RAPD ® 10-mer kits A-01 to BH20; and wherein said Xanthomonas campestris pv. Campestris resistant Brassica plant is obtained by a method comprising: - providing Xanthomonas campestris pv. Campestris resistant Brassica plant with deposit number NCIMB 41553; - introgressing of, or genomically combining, Quantitative Trait Locus 1 (QTL1) and Quantitative Trait Locus 2 (QTL2) from NCIMB 41553 in a Brassica acceptor plant using isolated genomic material of the acceptor plant and SEQ ID Nos 1 to 8 and RAPD primers from Operon RAPD 10-mer kits A-01 - BH-20 for identifying QTL 1 and QTL 2. - providing Xanthomonas campestris pv. Campestris resistant Brassica plant with deposit number NCIMB 41553; - introgressing of, or genomically combining, Quantitative Trait Locus 1 (QTL1) and Quantitative Trait Locus 2 (QTL2) from NCIMB 41553 in a Brassica acceptor plant using isolated genomic material of the acceptor plant and SEQ ID Nos 1 to 8 and RAPD primers from Operon RAPD 10-mer kits A-01 - BH-20 for identifying QTL 1 and QTL 2. <EOS>