Production and Identification of Interspecific Hybrids between Chinese Cabbage and Purple Cabbage Microsporogenesis of Several Male2Sterile Lines in Brassica rapa L. ssp. pekinensis Gene expression profiling in response to copper stress in Brassica rapa L. Chinensis by cDNA-AFLP Effect of Decomposing Walnut Green Husk on Growth and Physiological Characteristics of Brassica rapa L.var.chinensis Seedling Development of Molecular Markers and Map Integration for Seed Color Traits in Dahuang Rape (Brassica rapa L.) Effects of spraying aquatic extraction substance from residue of <i>P. baumii</i> on <i>Brassica rapa</i> L. Identification of SCAR Markers Linked to Orange Head Leaf Gene inChinese Cabbage ( Brassica rapa L. ssp. pekinensis) Microsporogenesis of Several Male2Sterile Lines in Brassica rapa L. ssp. pekinensis Seed DNA Methylation in Response to Heat Stress in Brassica rapa L.