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马铃薯(Solanum tuberosum L.)是贵州省六盘水市第三大粮食作物,具有重要的经济地位。由茄科雷尔氏菌(Ralstonia solanacearum)引起的马铃薯青枯病(Bacterial wilt)是一种世界性病害,是马铃薯生产中继晚疫病之后第二个最主要的限制性病害。本试验通过对贵州省六盘水市的马铃薯青枯病病原菌的生理小种及生化变种进行调查,为六盘水市马铃薯的抗病育种、引种栽培及青枯病的综合防治提供参考价值。结果表明,生理小种3号(生化变种2号)为优势小种,但生理小种1号(生化变种3号)、生理小种3号(生化变种2号)在本地区普遍流行,且两个生理小种分布无明显的地域特征,在海拔高度上亦无差异。
Solanum tuberosum L. is the third largest food crop in Liupanshui City, Guizhou Province, and has an important economic status. Bacterial wilt caused by Ralstonia solanacearum is a worldwide disease that is the second most dominant disease after potato late blight production. In this study, physiological races and biochemical variants of potato bacterial wilt pathogens were investigated in Liupanshui City of Guizhou Province to provide reference value for disease-resistant breeding, introduction and cultivation of potato and comprehensive control of bacterial wilt in Liupanshui City. The results showed that Physiological Race 3 (biochemical variant 2) was the dominant race, but Physiological Race 1 (Biochemical No.3) and Physiological Race 3 (Biochemical No.2) were prevalent in the region, and The distribution of two races showed no obvious regional characteristics and no difference in altitude.