【摘要】 采用离体叶片接种法,用2个马铃薯品种:春薯4号(对马铃薯晚疫病菌表现高度抗病)和津引8号(对马铃薯晚疫病菌表现高度感病)对采自中国马铃薯主产区(河北、云南、四川、黑龙江)的60个马铃薯晚疫病菌菌株进行了致病性(侵染率、病斑面积、产孢能力)和寄生适合度的测定。结果表明:菌株的致病性、寄生适合度和其地域来源有一定的相关性,来源于河北的菌株致病性和寄生适合度最强,而来源于四川的菌株致病性和寄生适合度最弱。更多还原

【Abstract】 Sixty isolates of Phytophthora infestans were isolated and purified from potato in four potato production areas including Hebei, Yunnan, Sichuan and Heilongjiang province. Pathogenicity(infection frequency, lesion size, sporulation capacity)and parasitic fitness of these isolates were conducted on two potato varieties(Chunshu 4, high resistant to late blight; Jinyin 8, high susceptible to late blight)in virto. The results showed that there were significant differences in infection frequency, lesion size, sporulation capacity and parasitic fitness of the 60 isolates. There were certain correlation between parasitic fitness and geographical origin. The isolates from Hebei province had the highest parasitic fitness and the isolates from Sichuan Province had the lowest fitness.更多还原