Virulence Differentiation of Xanthomonas oryzae pv. oryzicola in Southern Region of China

Chinese Journal of Rice Science

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Virulence Differentiation of Xanthomonas oryzae pv. oryzicola in Southern Region of China

GUO Ya-hui^{1; 2}; XU Zhi-gang ^{1; *}; HU Bai-shi¹; SHEN Xiu-ping¹; CHEN Zhi-yi ³; LIU Yong-feng ³

（¹College of Plant Protection; Nanjing Agricultural University; Nanjing 210095; China; E-mail:ms_ gyh5095_ cn@sina.com; ²Handan Agricultural College; Handan 057150; ³Plant Protection Institute; Jiangsu Academy of Agricultural Sciences; Nanjing 210014; China）

Received:1900-01-01 Revised:1900-01-01 Online:2004-01-10 Published:2004-01-10

中国南方水稻条斑病菌小种分化研究

郭亚辉1,2; 许志刚1,*; 胡白石1; 沈秀萍1; 陈志谊3; 刘永峰3

1南京农业大学植物保护学院，江苏南京 210095; 2邯郸农业高等专科学校，河北邯郸 057150; 3江苏省农业科学院植物保护研究所，江苏南京 210014

Abstract

Abstract: The virulence differentiation of 62 isolates of X. oryzae pv. oryzicola collected from different areas in southern China were identified based on strain-cultivar interaction by using 28 varieties with different resistance genes. Flag leaves at booting stage were inoculated with selected strains by needle puncture. It showed that the virulence of strains were differentiated distinctly. Weak interaction patterns were found mainly between bacterial isolates and rice varieties, but there were specific interaction significantly. It was suggested that the X.oryzae pv. oryzicola could be divided into six race groups, the interaction patterns on six differential varieties were RRRRRS, RRRRSS, RRRSSS, RRSRSS, RRSSSS, and RSSSSS.

Key words: Xanthomonas oryzae pv. oryzicola, rice streak, virulence, differential variety, race

摘要： 采用针刺接种的方法，在水稻孕穗期的剑叶上接种测定了国内南方稻区细菌性条斑病菌62个菌株的致病力。根据病菌与鉴别品种互作反应和亲和性的差异，将供试条斑病菌株区分为6个小种。大多数条斑病菌株与鉴别品种的互作反应表现为弱互作模式，部分菌株与品种间存在强互作关系.

关键词: 水稻条斑病菌, 水稻条斑病, 致病力, 鉴别品种, 小种

GUO Ya-hui ,XU Zhi-gang ,HU Bai-shi,SHEN Xiu-ping,CHEN Zhi-yi ,LIU Yong-feng . Virulence Differentiation of Xanthomonas oryzae pv. oryzicola in Southern Region of China[J]. Chinese Journal of Rice Science.

郭亚辉, 许志刚, 胡白石, 沈秀萍, 陈志谊, 刘永峰. 中国南方水稻条斑病菌小种分化研究[J]. 中国水稻科学.

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Virulence Differentiation of Xanthomonas oryzae pv. oryzicola in Southern Region of China

中国南方水稻条斑病菌小种分化研究

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