Bacteria belonging to the Pectobacterium and Dickeya genera are globally distributed phytopathogens that are responsible for economically important soft rot and blackleg diseases of potatoes. Since 2014, there have been increased outbreaks of blackleg disease in the Eastern US, with many cases caused by an especially virulent, nearly clonal strain of Dickeya dianthicola. This disease is thought to be spread via commercial trade of seed tubers with latent infections of these bacteria. There is an urgent need to develop resistant potato varieties to help reduce the accidental spread and damage caused by these diseases. In this study, we conducted an iterative screen of US Potato Genebank (Sturgeon Bay, WI) collections to find wild potato relatives with resistance to tuber soft rot. We found several Solanum microdontum lines with high-level resistance that may be useful as source germplasm for breeding soft rot resistance into commercial potato varieties.

属于Pectobacterium和Dickeya属的细菌是全球分布的植物病原体，它们是造成经济上重要的马铃薯软腐病和黑腿病的原因。自 2014 年以来，美国东部的黑腿病暴发有所增加，其中许多病例是由一种特别致命的、近乎克隆的Dickeya dianthicola菌株引起的. 这种疾病被认为是通过潜在感染这些细菌的种子块茎的商业贸易传播的。迫切需要开发抗性马铃薯品种，以帮助减少这些疾病造成的意外传播和损害。在这项研究中，我们对美国马铃薯基因库（威斯康星州鲟鱼湾）收集品进行了迭代筛选，以寻找对块茎软腐病具有抗性的野生马铃薯亲缘植物。我们发现了几个具有高水平抗性的Solanum microdontum品系，这些品系可能可用作将软腐病抗性培育成商业马铃薯品种的源种质。