Bacterial wilt (BW), caused by Ralstonia solanacearum species complex (RSSC), is a major disease affecting tomato and other solanaceous crops produced in Louisiana and worldwide. The most effective and economic management strategy for BW is the use of crop genetic resistance. However, regional genetic variation among RSSC strains has made stable and durable resistance elusive. A collection of tomato, eggplant and pepper (TEP) accessions that responds to globally diverse strains in the RSSC was screened for resistance to six RSSC strains, belonging to phylotypes I and II, from Louisiana, United States (US). Wilt severity was quantified from six days up to 25 days post-inoculation (DPI). Wilting increased most rapidly to 10 DPI and was generally more severe with Phylotype II strains. However, wilt response profiles depended on the accession-strain combination. Differences in aggressiveness, as measured by the area under the disease progress stairs, were observed among the phylotype I and II strains on TEP. Wilting responses were the most severe with the tomato accessions. Hawaii 7996, TML46, CLN1463 and R3034 were highly resistant to all phylotype I strains, but Hawaii 7996 displayed the best resistance to phylotype II strains. Remarkably, eggplant accession Ceylan SM 164 was resistant to all six strains. Eggplant accessions SM6, Surya, and AG91–25, as well as pepper accessions CA8 and MC4, were moderately to highly resistant to all six strains. Although resistance spectrum and levels of these tomato, eggplant and pepper accessions need to be confirmed by further experiments, our results already indicate that these accessions are potential BW-resistant rootstock candidates for grafting to susceptible market-driven tomato, eggplant and pepper produced in this US state.

青枯病（BW），由青枯雷尔氏菌种复合物（RSSC）是影响路易斯安那州和世界各地生产的番茄和其他茄科作物的主要疾病。BW最有效和经济的管理策略是利用作物遗传抗性。然而，RSSC菌株之间的区域遗传变异已使稳定和持久的抗性难以捉摸。对来自RSSC中全球不同菌株的番茄，茄子和辣椒（TEP）品种进行了筛选，筛选出对六种RSSC菌株的抗性，这些菌株分别来自美国路易斯安那州，属于系统型I和II。从接种后六天到25天（DPI）定量萎严重程度。枯萎最迅速地增加到10 DPI，通常在Phylotype II菌株中更严重。但是，枯萎的响应曲线取决于登录菌株的结合。攻击力的差异，如通过疾病进展阶梯下的面积所测量的，在TEP的I型和II型系统型菌株中观察到。番茄品种的枯萎反应最严重。Hawaii 7996，TML46，CLN1463和R3034对所有I型菌株均具有高度抗性，但Hawaii 7996对II型菌株表现出最佳抗性。值得注意的是，茄子种Ceylan SM 164对所有6个菌株均具有抗性。茄子登录号SM6，Surya和AG91–25，以及胡椒登录号CA8和MC4对所有六种菌株均具有较高的抗性。尽管这些番茄，茄子和辣椒种质的抗性谱和水平需要通过进一步的实验来确认，但我们的结果已经表明，这些种质是潜在的抗BW抗性砧木，可以嫁接到易受市场驱动的番茄上，