Transfer of resistance to clubroot (Plasmodiophora brassicae) to swedes (Brassica napus L. var. napobrassica Peterm) from B. rapa

brassica campestris brassica napus brassica oleracea breeding methods breeding programmes chou vert col cultivars disease resistance enfermedades de las plantas enfermedades fungosas fitomejoramiento fungal diseases genetica genetics interspecific hybridization kales maladie des plantes maladie fongique pathogens plant breeding plant diseases plasmodiophora brassicae resistencia a la enfermedad rutabaga rutabagas selection variedades varieties