条形柄锈菌大麦专化型分布区域的新发现

The New Discovery on Geographic Distribution of Puccinia striiformis West.ft sp.hordei in China

在26个小麦品种和20个大麦品种上,对采自陕西、青海和河南的10份大麦条锈病菌标样进行了致病性测定。除陕西的2份标样被鉴定为小麦专化型条中29号小种外,其余来自3省的8份标样均属大麦专化型。首次发现并证实了条形柄锈菌大麦专化型(Pucciniastriiformis West.f.sp.hordei)在中国西藏以外地区的分布,并确认大麦上发生的条形柄锈菌可以是大麦专化型,也可以是小麦专化型。

Pathogenicity of 10 isolates of barley stripe rust collected from Shaanxi, Qinghai and Henan was determined on 26 wheat cultivars and 20 barley cultivars. Eight isolates from the three provinces were identified as Puccinia striiformis West. f. sp. hordei, and two isolates from Shaanxi as the race CY29 belonging to P. striiformis West. f. sp. tritici. It is first verified that P. striiformis West. f. sp. hordei is distributed not only in Xizang but also in other regions in China, and the stripe rust on barley in China can be either P. striiformis West. f. sp. hordei or f. sp. tritici.