Study on optimization for ISSR reaction system in Brassica campestris ssp.chinensis using orthogonal design Clone,Phylogenetic and Expression Analysis of BcHSP70-1 Gene from Brassica campestris ssp.chinensis Pathogenic infection of the secondary zoospores of Plasmodiophora brassicae Woron Response of Gene BcLRK01 to TuMV Infection and Stress in Non-heading Chinese Cabbage Cloning and Expression Characterization of BcMPK4 from Brassica campestris ssp.chinensis Cloning and Expression Characterization of PR4 Protein Gene in Brassica campestris ssp.chinensis Induction of Autotetraploid Non-heading Chinese Cabbage with High-quality and Heat-tolerance by Colchicine Studies on Optimal Detection System of Immunofluorescence Labeling for Cell Microtubules in Brassica campestris ssp. chinensis Studies on Optimal Detection System of Immunofluorescence Labeling for Cell Microtubules in Brassica campestris ssp. chinensis Production of the Ogura Cytoplasmic Male Sterile(CMS)Lines of ChineseCabbage-pak-choi(Brassica campestris L.ssp.chinensis var.communis)and Turnip(B.campestris L.ssp.rapifera)and Cytological Observation ofTheir Sterile Organs Growth, Physiological and Biochemical Characteristics of Non-heading Chinese Cabbage under Low Temperature Stress Anther Development of Pol CMS and Its Corresponding Maintainer Line in Autotetraploid Non-Heading Chinese Cabbage Cloning and Expression Analysis of HSP Gene from Brassica campestris ssp. chinensis Induction of Tetraploidy of Non-heading Chinese Cabbage with Late-bolting and Identification of Chromosome Configuration Study on Nutritional Traits and Isoenzymes of Diploid and Autotetraploid Non-heading Chinese Cabbage Binomial sampling models for aphids on Brassica campestris ssp. chinensis and thir sampling precision analysis