福建省番茄晚疫病菌生理小种鉴定分析

Identification and Analysis on Physiological Races of PhytophthorainfestansIsolated in 2014 from Tomatoes in Fujian

为明确福建省番茄晚疫病菌生理小种组成结构,利用5个鉴别寄主对2014年分离自福建省的78株番茄晚疫病菌的生理小种进行测定。研究结果表明,供试的番茄晚疫病菌由T1、T1,2、T1,5、T1,3,4、T1,2,5、T1,2,3,4和T1,2,3,4,5共7个小种组成,其中T1,2地理分布最广,出现频率最高,占鉴定总数的28.20%,为福建省番茄晚疫病菌优势小种,毒力频率分析显示,对5个抗番茄晚疫病基因Ph-1、Ph-2、Ph-3、Ph-4和Ph-5有毒力的毒性基因出现频率依次为100%、64.1%、35.09%、35.09%和26.92%,表明Ph-1和Ph-2在福建省已丧失抗性。

Thephysiologicalracesof Phytophthorainfestansisolatedin2014fromtomatoesinFujianwerestudied. Seven physiological races from the 78 isolates were identified in 5 hosts .Among them ,T1 ,2 was the most widely distributed and predominant in the province with an appearance frequency of 28.20% .The occurrence frequency of the virulent genes resistant to Ph‐1 , Ph‐2 , Ph‐3 , Ph‐4 and Ph‐5 were 100% ,64.1% ,35.09% ,35.09% and 26.92% ,respectively .It appeared that the tomato cultivars carrying Ph‐1 and Ph‐2 genes had become susceptible to the prevalent races of P .infestans in Fujian .