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前言 国外早在1932年即开始探讨西瓜枯萎病菌(Fusarium oxysporum f.sp.niveum(Smith Snyd.and Hans.)的致病性分化问题,迄今已发现3个生理小种,按基因对基因关系上的差异,被命名为小种0、1、2。据报道,小种1的分布最广,美国各地均有;小种2亦已在以色列、希腊、土耳其、美国的德克萨斯、佛罗里达和俄克拉荷马、法国及西班牙等地存在,它能侵害现在已知的所有携带抗枯萎基因的栽培材料,包括Calhoun Gray.Smokylee、Sugarlee和Summit等“高抗”品种,表明此小种潜在巨大的危险性。国内在这方面至今未见报道,因此,迅速查明该菌在我国的分化现状,对制定西瓜抗枯萎病育种策略很有实际意义。
Foreword Abroad as early as 1932 began to explore the pathogenic differentiation of Fusarium oxysporum f.sp. niveum (Smith Snyd.and Hans.), So far has been found that three physiological races, gene-to-gene relationship , Was named races 0,1,2. Race 1 is reported to be the most widely distributed throughout the United States; races 2 have also been reported in Israel, Greece, Turkey, the United States of America in Texas, Florida And Oklahoma, France and Spain, it can invade all currently known cultivars carrying anti-wilt genes, including “high resistance” varieties such as Calhoun Gray. Smokylee, Sugarlee and Summit, indicating the potential of this races Huge danger.The domestic has not been reported in this respect so far, therefore, to quickly identify the status of the bacteria in China differentiation, watermelon fusarium wilt breeding strategy is of great practical significance.