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首页> 外文期刊>Plant Disease >Screening of Wild Potatoes Identifies New Sources of Late Blight Resistance
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Screening of Wild Potatoes Identifies New Sources of Late Blight Resistance

机译：筛选野生土豆识别新的枯萎性抗性的新来源

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Late blight (LB) of potato is considered one of the most devastating plant diseases in the world. Most cultivated potatoes are susceptible to this disease. However, wild relatives of potatoes are an excellent source of LB resistance. We screened 384 accessions of 72 different wild potato species available from the U.S. Potato GeneBank against the LB pathogen Phytophthora infestans in a detached leaf assay (DLA). P. infestans isolates US-23 and NL13316 were used in the DLA to screen the accessions. Although all plants in 273 accessions were susceptible, all screened plants in 39 accessions were resistant. Resistant and susceptible plants were found in 33 accessions. All tested plants showed a partial resistance phenotype in two accessions, segregation of resistant and partial resistant plants in nine accessions, segregation of partially resistant and susceptible plants in four accessions, and segregation of resistant, partially resistant, and susceptible individuals in 24 accessions. We found several species that were never before reported to be resistant to LB: Solanum albornozii, S. agrimoniifolium, S. chomatophilum, S. ehrenbergii, S. hypacrarthrum, S. iopetalum, S. palustre, S. piurae, S. morelliforme, S. neocardenasii, S. trifidum, and S. stipuloideum. These new species could provide novel sources of LB resistance. P. infestans clonal lineagespecific screening of selected species was conducted to identify the presence of RB resistance. We found LB resistant accessions in Solanum verrucosum, Solanum stoloniferum, and S. morelliforme that were susceptible to the RB overcoming isolate NL13316, indicating the presence of RB-like resistance in these species.
机译：马铃薯晚疫病被认为是世界上危害最严重的植物病害之一。大多数种植的土豆都容易感染这种疾病。然而，马铃薯的野生近亲是抗LB的极好来源。我们在离体叶片分析（DLA）中筛选了来自美国马铃薯基因库的72种不同野生马铃薯品种的384份材料，以对抗LB病原体晚疫霉。在DLA中使用晚疫病菌分离株US-23和NL13316来筛选材料。尽管273份材料中的所有植株都是敏感的，但39份材料中的所有筛选植株都是抗性的。在33份材料中发现了抗性和感病植株。所有受试植株在两份材料中表现出部分抗性表型，9份材料中抗性和部分抗性植株分离，4份材料中部分抗性和敏感植株分离，24份材料中抗性、部分抗性和敏感个体分离。我们发现了一些以前从未报道过的对LB有抗药性的物种：白花茄、仙鹤草、嗜酸乳杆菌、埃伦贝吉杆菌、海巴氏杆菌、伊波塔鲁姆杆菌、帕卢斯特杆菌、皮乌拉杆菌、莫雷利福姆杆菌、新卡德纳西杆菌、三裂杆菌和托叶杆菌。这些新物种可能提供新的抗LB来源。对所选物种进行马铃薯晚疫病菌克隆谱系特异性筛选，以确定是否存在抗RB。我们在疣状龙葵、匍匐茎龙葵和羊肚菌中发现了抗LB的材料，这些材料对RB克服分离物NL13316敏感，表明这些物种中存在类似RB的抗性。

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