Non-heading Chinese cabbage (Brassica campestris ssp.chinensis Makino) is a verypopular leafy-vegetable in China, particularly in South of China. It plays a very importantrole in the year-round supply. However, downy mildew, virus disease and soft rot diseaseare so severe that the quality and yield are influnenced, we have to develop new varietiesusing genetic engineering method in addition to conventional methods.
Brassica campestris was hard to regeneration in vitro, while gene engineer ...