2007～2009年福建省稻瘟病菌的生理小种变化研究

Physiological Race of Magnaporthe grisea in Fujian from 2007 to 2009

摘要: 采用全国统一生理小种鉴别品种、CO39-NILs鉴别品种和LTH-NILs鉴别品种鉴定2007～2009年从福建省各地采集分离的223株单孢稻瘟病菌生理小种和致病型组成。结果表明,223株稻瘟病菌被鉴定出20个生理小种,其中ZB13为优势生理小种,出现频率为26.91%;CO39-NILs鉴别品种鉴定出18个致病型,其中I34.1为优势致病型,出现频率为47.09%;LTH-NILs鉴别品种鉴定出23个致病型,其中J76.2为优势致病型,出现频率为41.26%,从而表明福建省稻瘟病菌的优势生理小种组成相对稳定。

Abstract: From 2007 to 2009,223 isolates of Magnaporthe grisea were collected in different parts of Fujian,China.The virulence of these isolates was assayed with Chinese race differentials,CO39 near-isogenic lines(NILs) and LTH NILs.The results showed that these 223 isolates could be classified into 20 physiological races by the Chinese race differentials,or 18 and 23 pathogenic types by CO39 NILs and LTH NILs.The dominant physiological race was ZB13 with occurring frequency of 26.91%,and the dominant types were I34.1 and J76.2 with occurring frequency of 47.09% and 41.26%,respectively.It seemed apparent that the dominant physiological race of M.grisea found in Fujian remained basically unchanged.