黄淮和长江中下游地区大豆花叶病毒株系鉴定与分布

通过生物学测定和血清学方法检测了从黄淮和长江中下游地区采集的135个病样，其中81个表现为SMV阳性反应。证明大豆花叶病毒仍为该地区的优势病毒，根据这81个SMV分离物在25个鉴别寄主上的反应，结合分离物来源进行分析，结果表明：(1)黄淮和长江中下游地区大豆花叶病毒可划为SC～1～SC-8八个株系群；(2)从多组鉴别寄主体系中挑选出的南农1138-2、齐黄10号、8101、铁丰25、Davis、Buffalo、早熟18、Kwanggyo、齐黄1号九个大豆品种可以作为一套综合的SMV株系鉴别寄主；(3)弱毒株系群SC-1和SC-3在黄淮和长江中下游地区分布较广，强毒株系群SC-8仅在江苏南京发现。

CLASSIFICATION AND DISTRIBUTION OF STRAIN GROUPS OF SOYBEAN MOSAIC VIRUS IN MIDDLE AND LOWER HUANG-HUAI AND CHANGJIANG VALLEYS

The symptomatology and serology of 135 specimens of soybean virus collected from Middle and Lower Huang-Huai and Changjiang Valleys were studied. The reactions to SMV antiserum of the 81 out of 135 specimens were positive. The conclusions were obtained as follows: (1)The soybean mosaic virus in this area could be classified into eight strain groups designated as SC-1,SC-2,SC-3,SC-4,SC-5,SC-6,SC-7 and SC-8, respectively. (2)The soybean cultivars, such as Nannong 133-3, Qihuang No.10, 8101, Tiefeng No.25, Davis, Zaoshu 18, Buffalo, Kwanggyo, and Qiuang No.1 were chosen as the differential hosts to identify the SMV strain groups in the Middle and Lower Huang-Huai and Changjiang Valleys. (3)The distribution of the low virulence strain groups SC-1 and SC-3 were wide in and the Middle and Lower Huang-Huai and Changjiang Valleys, while the high virulence strain group SC-8 was only found in Nanjing, Jiangsu province.