5个省52份水稻品种对9个白叶枯病菌的抗性鉴定
毕业论文关键词：水稻；白叶枯病菌；抗性鉴定；致病力
Identification of Resistance to Nine Bacterial Blight Races in Fifty-two Rice Varieties in Five Provinces
Abstract：The bacterial blight of rice which caused by Xanthomonas oryzae pv.oryzae is one of the most destructive disease in the world. Fifty-two rice varieties collected from five provinces, including Guangxi, Guizhou, Heilongjiang, Jiangxi and Sichuan, were inoculated with 9 races (R1~R9) of Xanthomonas oryzae pv. Oryzae (Xoo) in the field conditions respectively, in order to assess the resistance of these varieties to bacterial leaf blight. The results showed that the resistance of varieties collected from Heilongjiang provinces to bacterial leaf blight was relatively weaker, they were resistant to only 4 Xoo races（R1, R3, R5, R6）. The resistance of varieties collected from Guizhou provinces to bacterial leaf blight was relatively stronger, they were resistant to 8 Xoo races（R1~R7, R8）. The varieties from Guangxi, Jiangxi and Sichuan provinces were resistant to 7 Xoo races. 96.2% of the varieties tested in this study were susceptible or moderately susceptible to strong-virulence races R8 and R9. The weak-virulence race R1 can not infect all varieties. It suggested that more isolates should be collected from rice-growing fields in order to analyze the population variation of Xoo races, the resistance level of the commercial varieties be evaluated to locally prevalent races of Xoo and the commercial varieties be reasonably grown based on the distribution of prevalent races of Xoo．
Key words: Rice；Xanthomonas oryzae pv.oryzae；resistance assessment；virulence
目 录
摘要 1
关键词 1
Abstract 1
Key words 2
0 引言 2
1 材料与方法 2
1.1 材料 2
1.1.1 供试品种 2
1.1.2 供试菌株 4
1.2 方法 4
1.2.1 种植与管理 4
1.2.2 病原菌培养与接种 4
1.2.3 抗病性调查 4
2 结果与分析 4
2.1 不同省份的水稻品种对白叶枯病的抗性 4
2.1.1 广西壮族自治区的水稻品种对白叶枯病的抗性 6
2.1.2 贵州省的水稻品种对白叶枯病的抗性 6
2.1.3 黑龙江省的水稻品种对白叶枯病的抗性 6
2.1.4 江西省的水稻品种对白叶枯病的抗性 7
2.1.5 四川省的水稻品种对白叶枯病的抗性 7