Plasmodiophora brassicae-resistant Brassica plant, seeds and plant parts thereof and methods for obtaining the same

A Plasmodiophora brassicae-resistant hybrid Brassica oleracea plant comprising in its genome three or more genetic factors imparting resistance, wherein the Plasmodiophora brassicae-resistance is from a plant with deposit number NCIMB 41685;

• wherein the genome includes a Quantitative Trait Locus 1 (QTL1) and a Quantitative Trait Locus 3 (QTL3) and a Quantitative Trait Locus 5 (QTL5),
• wherein QTL1 is characterized by a Random Amplified Microsatellite Polymorphism (RAMP) marker comprising a fragment of 294 bp with primer combination SEQ ID NOs:1 and 7;
• QTL3 is characterized by a RAMP marker comprising a fragment of 159 bp with primer combination SEQ ID NOs:9 and 7;
• and
• QTL5 is characterized by a RAMP marker comprising a fragment of 276 bp with primer combination SEQ ID NOs:16 and 7.