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

Physiological races of Xanthomonas oryzae pv. oryzae from japonica rice in Northeast China and resistance of rice varieties to the Race 9

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。

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 Race9 were widely distributed in Jilin,Liaoning and Heilongjiang provinces,while Race3 and Race8 only in Heilongjiang Province,and Race 6 only in Liaoning Province.Among all 30 tested rice varieties,13 varieties were resistant to Race 9,7 were medium resistant,6 were medium susceptible,and4 were susceptible.The results provide the basis for developing resistant resource of japonica rice for control of bacterial blight disease.