中文摘要：

为明确大豆花叶病毒侵染大豆后引发症状的不同类型及比例,对726个大豆品种接种SMV弱毒株系SC3和强毒株系SC7后引发的症状进行了调查。结果显示：SC3可系统侵染726个供试大豆品种中的643个,有313个表现花叶和坏死混合症状,275个表现花叶症状,57个表现坏死症状。在坏死症状中,有154个表现为枯斑坏死症状,156个表现叶脉坏死症状,60个表现叶脉和枯斑混合坏死症状;SC7可系统侵染726个供试大豆品种中的607个,有359个表现花叶和坏死混合症状,203个表现花叶症状,45个表现坏死症状。在坏死症状中,有167个表现为枯斑坏死症状,152个表现叶脉坏死症状,70个表现叶脉和枯斑混合坏死症状,15个表现顶端坏死症状。结果说明SMV引发的症状以花叶和坏死混合症状为主,花叶症状次之,坏死症状最少;而坏死症状多以单独类型出现,混合坏死症状出现比例较低,顶端坏死出现比例最低。

英文摘要：

We investigated the symptoms on 726 soybean varieties leaves inoculated by soybean mosaic virus（ SMV） strains SC3 and SC7 to determine the different types and proportions of the symptoms on soybean leaves infected by SMV. SC3 systematic infected 643 out of 726 soybean varieties,among these,313 showed mosaic and necrotic mixing symptoms,272 showed mosaic and 57 showed necrosis. In the necrosis,there were 154 spots necrosis,156 vein necrosis and 60 vein and spots necrotic mixing symptoms. SC7 systematic infected 607 out of 726 soybean varieties,among these,359 showed mosaic and necrotic mixing symptoms,203 showed mosaic and 45 showed necrosis. In the necrosis,there were 167 spots necrosis,152 vein necrosis,79 vein and spots necrotic mixing symptoms and 15 dieback necrosis. The results showed that the primary symptom caused by SMV was mosaic and necrotic mixing symptoms,followed by mosaic,and the ratio of necrosis was the lowest; the necrotic symptoms usually showed as spots necrosis or vein necrosis,followed by vein and spots necrotic mixing symptoms,the ratio of dieback necrosis was the lowest.