1 State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China.
2 Plant Protection Institute, Ningxia Agriculture and Forestry Academy, Yinchuan, Ningxia 750002, China.
Plant Dis. 2019 Jun;103(6):1357-1362. doi: 10.1094/PDIS-10-18-1815-RE. Epub 2019 Apr 19.
Verticillium wilt caused by spp., also called potato early dying disease, is one of the most serious soilborne diseases affecting potato production in China. The disease has been expanding into most potato production areas over the past few years. Information on host resistance against Verticillium wilt among the potato cultivars in China is scarce, but it is critical for sustainable management of the disease. This study, therefore, evaluated 30 commercially popular potato cultivars against strain Vdp83 and strain Vnp24, two well-characterized strains causing Verticillium wilt of potato in China. Both strains were isolated from diseased potato plants, and they were previously proven to be highly virulent. Ten plants of each cultivar were inoculated with the strain and incubated on greenhouse benches. Symptoms were rated at weekly intervals, and the relative area under the disease progress curve was calculated. The experiment was repeated once, and nonparametric analysis was used to calculate the relative marginal effects and the corresponding confidence intervals. Five resistant cultivars and four susceptible cultivars identified from the analyses were then challenged with the strain. Cultivar responses to were like those exhibited against , except for one cultivar. This study showed that resistance among potato cultivars exists in China against spp. and that the resistance to identified in potato is also effective against the other species that cause Verticillium wilt with a few exceptions. Cultivars identified as resistant to Verticillium wilt can be deployed to manage the disease until the breeding programs develop new cultivars with resistance from the sources identified in this study.
由 spp. 引起的黄萎病，也称为马铃薯早死病，是中国影响马铃薯生产的最严重的土传病害之一。近年来，该病害已扩展到中国大部分马铃薯产区。中国马铃薯品种对黄萎病的抗性信息稀缺，但这对于该病的可持续管理至关重要。因此，本研究评估了 30 个商业上流行的马铃薯品种对中国马铃薯黄萎病菌株 Vdp83 和 Vnp24 的抗性。这两个菌株均从患病马铃薯植株中分离得到，并且先前已被证明具有高度致病力。每个品种的 10 株植物均用菌株接种，并在温室长椅上培养。每周评估一次症状，并计算病害进展曲线下的相对面积。该实验重复进行了一次，并使用非参数分析计算了相对边缘效应及其相应的置信区间。从分析中确定了五个抗性品种和四个敏感性品种，然后用菌株对它们进行了挑战。对 的反应与 一致，除了一个品种。本研究表明，中国的马铃薯品种存在对 spp. 的抗性，并且对马铃薯中鉴定出的抗性也对引起黄萎病的其他 种有效，除了少数例外。鉴定为抗黄萎病的品种可以用于管理该病害，直到育种计划从本研究中确定的来源培育出具有抗性的新品种。
