Microsporogenesis of Several Male2Sterile Lines in Brassica rapa L. ssp. pekinensis Microsporogenesis of Several Male2Sterile Lines in Brassica rapa L. ssp. pekinensis Production and Identification of Interspecific Hybrids between Chinese Cabbage and Purple Cabbage 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) Development of Molecular Markers and Map Integration for Seed Color Traits in Dahuang Rape (Brassica rapa L.) Effect of Decomposing Walnut Green Husk on Growth and Physiological Characteristics of Brassica rapa L.var.chinensis Seedling Gene expression profiling in response to copper stress in Brassica rapa L. Chinensis by cDNA-AFLP