东北亚四国（地区）SMV株系毒力比较

将我国，韩国，日本及俄罗斯远东地区的ＳＭＶ株系与鉴别寄主交互接种测定其毒力。结果指出采用外国的株系鉴别寄坟难以区分我国株系毒力。同样，用我国鉴别寄坟也难以区分外国毒株的毒力，所测定的我国９个株系的１３个代表毒株全部能侵染最抗病的鉴别寄主韩国的Ｂｕｆｆａｌｏ和日本的Ｈａｒｏｊｏｙ。

COMPARISON OF VIRULENCE OF SMV STRAINS FROM DISTRICTS OF NORTHEAST ASIAN COUNTRIES

Virulence of SMV isolates was tested by cross-inoculation of representative strains on differentials from northeast part of China, South Korea, Japan and Far East Russia. Chinese strains could not be classified by foreign differentials. All 9 strains including 13 isolates tested severely in fected Buffalo from South Korea and Harosoy from Japan which were the most resistant differential cultivars respectively. Only part of foreign differentials could separate virulence of Chinese strains, such as Kwanggyo from South Korea and Tachiyutaka from Japan could separate S1 and S2 from S3, Davis from South Korea and Tomoyutake from Japan could separate S1 from other strains. G7, the highest virulent strain of South Korea, and SMV-B, intermediate virulent strain of Japan, were classified only as S1, the lowest virulent strain of China. Strain could not and need not be classified by foreign differentials without any relationship to domestic cultivars. Using current domestic cultivars as differentials is more reasonable and valuable for soybean breeding.