摘要
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％。
groups with 33 physiological races of rice blast fungus Magnaporthe grisea(Pyricularia oryzae) were identified from 584 isolates obtained from farmer's field using Chinese Differential Variaties in Guangdong Province during 1995～1997. Among them, Zhong C group was the dominant group with the frequency of 45.3% in general and race ZC13 was the most prevalent race with the total frequency of 27.3% over the past 3 years.The results showed race constitution changed from year to year: ZC13 (23.7%), ZG1 (21.9%), ZC15 (15.6%) and ZA45 (11.5%) were the dominant race in 1995,but ZG1 (22.9%),ZC13(20.3%) and ZC15 (19.6%) in 1996 and ZC13 (39.8%),ZB13( 18.6% ),ZC15(10.6%) and ZG1(10.6%)in 1997.A pattern of race distribution over 2 geographical regions was also noticed:the frequency of ZC13 was higher in plain and coastal areas than in mountainous areas. In contrast the frequency of ZB13 was higher in mountainous areas. And specially ,the frequency of ZB13 was as high as 24.3% in mountainous areas while in plain and coastal areas was as low as 10.4% in 1997.
出处
《植保技术与推广》
1998年第2期3-5,共3页
Plant Protection Technology and Extension
关键词
水稻
稻瘟病
生理小种
类型
分布
广东
rice Magnaporthe grisea(Pyricularia oryzae) physiological race
