Soybean rust, caused by the biotrophic fungus Phakopsora pachyrhizi, is the most important foliar disease of soybean (Glycine max) worldwide. Deployment of resistant soybean cultivars is the best option for managing this disease. Genes conferring resistance to P. pachyrhizi have been identified, but pathotypes of the rust fungus overcoming these resistance genes have also been found. To identify novel resistance genes, soybean genotypes from both local and international sources were screened at multiple locations in Tanzania and Uganda in 2016 and 2017. The results from this screening revealed that infection types, disease severities, and sporulation levels varied among the genotypes and locations. The majority of the genotypes had tan‐coloured (TAN) lesions and developed moderate sporulation, implying susceptibility, while only seven of the 71 lines had reddish‐brown (RB) lesions and showed low disease severities in all of the screening environments. We identified seven genotypes that were the most resistant to rust in the most locations over the two years. These genotypes will be useful for further studies and, ultimately, for rust management, as they show broad resistance to various pathotypes of the rust fungus.

中文翻译：

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评估东非大豆基因型对锈锈菌Phakopsora pachyrhizi的抗性

大豆锈病是由生物营养性真菌菜豆（Phakopsora pachyrhizi）引起的，是全世界最重要的大豆叶面疾病（Glycine max）。部署抗性大豆品种是控制该病的最佳选择。赋予对P的抗性的基因。ach子已经鉴定出铁锈菌克服这些抗性基因的致病型。为了鉴定新的抗性基因，于2016年和2017年在坦桑尼亚和乌干达的多个地点筛选了来自本地和国际来源的大豆基因型。筛选结果表明，感染类型，疾病严重程度和孢子形成水平在基因型和位置之间有所不同。 。大多数基因型具有棕褐色（TAN）病变，并形成中度孢子形成，这意味着易感性，而71个品系中只有7个具有红褐色（RB）病变，并且在所有筛查环境中均显示出较低的疾病严重度。我们确定了两年内在大多数地方对锈病抵抗力最强的七个基因型。这些基因型将有助于进一步的研究，并且