东北水稻白叶枯病菌生理小种及水稻品种对9号小种的抗性

摘要

Population structure and distribution of Xanthomonas oryzae pv.oryzae physiological races from japonica rice in Northeast China were investigated,and resistance of 30 rice varieties to Race 9 was tested.The results suggested that there were six races in Northeast China,including Race 1,Race 2,Race 3,Race 6,Race 8 and Race 9.The Race 1, Race 2 and Race 9 were widely distributed in Jilin,Liaoning and Heilongjiang provinces,while Race 3 and Race 8 only in Heilongjiang Province,and Race 6 only in Liaoning Province.Among all 30 tested rice varieties,13 varieties were resist-ant to Race 9,7 were medium resistant,6 were medium susceptible,and 4 were susceptible.The results provide the basis for developing resistant resource of japonica rice for control of bacterial blight disease.%对东北地区水稻白叶枯病菌生理小种群体的构成及分布，以及水稻品种对白叶枯病菌9号小种的抗性进行了研究。结果表明，东北地区水稻白叶枯病菌生理小种群体由6个小种，即 Race 1、Race 2、Race 3、Race 6、Race 8和 Race 9构成。小种 Race 1、Race 2和 Race 9在东北三省吉林、辽宁和黑龙江都有分布，小种 Race 3和 Race 8只存在黑龙江省，Race 6只存在辽宁省。在30个水稻品种中，对9号生理小种表现抗病的有13个，出现频率为43．3％；中抗7个，频率23．3％；中感6个，频率20．0％；感病4个，频率13．3％。本研究为在东北粳稻地区挖掘白叶枯病的抗源，以及利用抗病品种控制白叶枯病危害提供依据。