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采用中国稻瘟病菌鉴别品种,在本地区8个县(市)63个乡117个村的43个水稻品种上,采集分离了564个有效单孢菌株,鉴定出7群19个中国小种和7群58个吉林小种。其中ZE、ZF、ZD和ZG4个群为主要菌群,ZE_1小种出现频率高(46.2％),分布广,是我州优势小种。主要小种有ZF_1、ZD_1、ZG_1,其出现频率分别为16.3、15.1、9.6％。以侵染粳稻鉴别品种的小种为主,但不能忽视籼稻小种的存在。研究结果表明,我地区主栽品种的致病小种组成比较复杂,京引127、松前、姬穗波、牡丹江4号等品种已严重地感病。因此。今后必经不断地培育后继品种的同时,有目的地轮换和搭配种植具有田间抗性和多抗性品种,以及结合药剂防治措施,延长栽培品种的寿命。
In this study, 434 rice cultivars from 117 Chinese villages in 63 townships of 8 counties (cities) in this region were collected and 564 effective monospora strains were isolated and identified. Seven Chinese races 7 groups of 58 Jilin race. Among them, ZE, ZF, ZD and ZG4 were the main groups. ZE_1 races appeared in high frequency (46.2%) and distributed widely. The main race ZF_1, ZD_1, ZG_1, the frequency of occurrence of 16.3,15.1,9.6%. In order to infiltrate the races of japonica differentiated varieties, but can not ignore the existence of indica races. The results showed that the composition of pathogenic races of the main cultivars in our region is quite complex, and varieties such as Jingyin 127, Songze, Ji Suibo and Mudanjiang 4 have been severely infected. therefore. The future will continue to cultivate the successor species at the same time, with the purpose of rotation and with the planting of field-resistant and multi-resistant varieties, combined with chemical control measures to extend the life of cultivated varieties.