Breeding lines with two,three and four resistance genes were tested for resistance to different races of bacterial blight pathogen( Xanthomonas oryzae pv.

• 基因聚合品种对水稻白叶枯病菌的抗性达到高抗至免疫水平,病斑长度比单基因品系明显缩短,表明聚合抗病基因提高了水稻品种的抗性。