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1987～1988年应用全国统一的稻瘟病菌鉴别品种对采自省内30个县(市)的145价标样的167个有效单孢分离菌进行测定,鉴定出包括过去尚未出现过的ZD群小种在内的7群36个生理小种。较1978～1982年多26个以籼型种群为主的新小种,分别是:ZA13、15、29、35、47、53、59、61,ZB1、7、11、13、15、17、19、21、25、27、ZC1、3、5、7、9、11,ZD1、7。省内籼型小种大量增加,其频率由1978～1982年的11.4％上升为38.91％。但优势小种仍为ZG1。各地区稻瘟病菌生理小种的组成都发生了变化,均出现了新的致病性小种。一度为我省主栽品种的桂朝2号、汕优2号、威优2号等在生产上相继感病,据测定浸染菌系以籼型小种为主。威优481、D优63、汕优64等7个杂稻及育417、金麻粘的抗菌系谱测定结果表明,除威优481和D优63不受侵染外,其它品种都存在致病性不同、数量不等的侵染菌系。
From 1987 to 1988, 167 valid single-spore isolates of 145 price standard samples collected from 30 counties (cities) in the province were determined using a unified national identification strain of Magnaporthe grisea, including the ZD group that had not appeared in the past Small races, including 7 groups of 36 physiological races. Compared with 1978 to 1982, more than 26 new indica-based races, namely: ZA13,15,29,35,47,53,59,61, ZB1,7,11,13,15,17, 19,21,25,27, ZC1,3,5,7,9,11, ZD1,7. The number of indica races in the province increased significantly, with the frequency increasing from 11.4% in 1978 ~ 1982 to 38.91%. However, the dominant race is still ZG1. The composition of physiological races of Magnaporthe grisea in different regions all changed, and new pathogenic races appeared. Once for the main cultivars in our province Gui Chaoyan 2, Shanyou 2, Weiyou 2 have been in the production of disease, it is determined that the dip in the main line of indica races. Weiyou 481, D you 63, Shanyou 64 and other seven hybrid rice and breeding 417, Jinma stick antibacterial lineage determination results show that, except for Weiyou 481 and D You 63 are not infected, the other species are pathogenic Different sex, ranging from the number of infecting bacteria.