Genetics of Resistance to Bacterial Blight(Xanthomonas campestris pv.oryzae) in Rice Ⅲ.Allelism Analysis of Two Adult Plant Resistance Genes X_a-6 and X_a-3 Rice Transformation with a Phytoalexin Gene and Bioassay of the Transgenic Plants Effects of silicon application on resistance against bacterial blight and antioxidant defense activities of rice leaves Genetic Studies of Resistance to Bacterial Blight (Xanthomonas oryzae pv.oryzae) in Nine Rice Cultivars STUDY ON THE CORRELATION OF RESISTANCE AND SUSCEPTIBILITY TO BACTERIAL BLIGHT WITH THE ACTIVE OXYGEN AND THE DEFENSIVE ENZYMES IN HYBRID RICE SEEDINGS