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１９９５～１９９７年，从广东省各市、县田间采集并经单孢分离获得的５８４份水稻稻瘟病菌菌株，用全国鉴别品种鉴定出８群３３个生理小种。３ａ来，ＺＣ群一直是优势小种群，总的出现频率是４５．３％，ＺＣ１３一直是最优势小种，总的出现频率是２７．３％。优势小种的组成随年份而变化：１９９５年，优势小种是ＺＣ１３、ＺＧ１、ＺＣ１５和ＺＡ４５，频率分别为２３．７％、２１．９％、１５．６％和１１．５％；１９９６年，优势小种是ＺＧ１、ＺＣ１３和ＺＣ１５，频率分别是２２．９％、２０．３％和１９．６％；１９９７年，优势小种是ＺＣ１３、ＺＢ１３、ＺＣ１５和ＺＧ１，频率分别是３９．８％、１８．６％、１０．６％和１０．６％。生理小种的生态分布特点是：ＺＣ１３在平原与沿海地区出现的频率较高；而ＺＢ１３则正相反，在山区市、县出现的频率较高，特别是１９９７年，ＺＢ１３在山区出现的频率为２４．７％，而在平原与沿海地区出现的频率是１０．４％。
From 1995 to 1997, 584 strains of Magnaporthe grisea were collected from the cities and counties of Guangdong Province and isolated from single strains. Eight groups of 33 physiological races were identified with the national differential varieties. 3a, the ZC group has been a dominant small population, the total occurrence frequency is 45.3%, ZC13 has been the most predominant race, the total frequency of occurrence is 27.3%. The composition of dominant races varied with years: in 1995, the dominant races were ZC13, ZG1, ZC15 and ZA45 with frequencies of 23.7%, 21.9%, 15.6% and 11.5% respectively; in 1996 , And the dominant races were ZG1, ZC13 and ZC15 with frequencies of 22.9%, 20.3% and 19.6%, respectively; in 1997, the dominant races were ZC13, ZB13, ZC15 and ZG1 with frequencies of 39.8 %, 18.6%, 10.6% and 10.6%. The ecological distribution of physiological races is characterized by: ZC13 in the plains and coastal areas appear higher frequency; and ZB13 is the opposite, in mountainous cities and counties appear higher frequency, especially in 1997, ZB13 in mountainous area frequency 24.7%, while in plain and coastal areas the frequency is 10.4%.