REACTION OF YELLOW PASSION FRUIT TO MELOIDOGYNE INCOGNITA RACE 3

ABSTRACT This study concerned the reaction of yellow passion fruit ‘Maguary’ and ‘Afruvec’ to the phytonematode Meloidogyne incognita race 3 in greenhouse conditions. An entirely randomized experimental design with 3 treatments (‘Maguary’, ‘Afruvec’, and tomato cv. ‘Rutgers’) and 4 repetitions was used, each plot consisting of 1 vase containing 1 plant. After 6 months, an evaluation was made of the index of galls and egg mass in the yellow passion fruit varieties and in the tomato cv. ‘Rutgers’. The classification of resistance to the phytonematode was made by criterion of the reproduction factor (RF). ‘Maguary’ presented a zero index of galls and egg mass, while ‘Afruvec’ showed a low index of galls and egg mass in relation to the tomato cv. Rutgers. According to the RF, ‘Maguary’ was characterized as immune to the phytonematode, while ‘Afruvec’ was resistant, and the tomato cv. ‘Rutgers’ was susceptible.**摘要** 本研究探讨了温室条件下，黄色西番莲（yellow passion fruit）品种‘Maguary’与‘Afruvec’对植物线虫（phytonematode）南方根结线虫3号生理小种（Meloidogyne incognita race 3）的抗性反应。试验采用完全随机试验设计，设置3个处理组（‘Maguary’、‘Afruvec’以及番茄栽培品种‘Rutgers’），共4次重复，每个试验小区为1盆种植1株植株的盆栽单元。试验持续6个月后，对供试黄色西番莲品种及番茄栽培品种‘Rutgers’的虫瘿指数与卵块指数进行了评估。本研究以繁殖系数（RF）为分级标准，对供试材料的抗线虫性进行分类。结果显示，‘Maguary’的虫瘿指数与卵块指数均为0，而‘Afruvec’的虫瘿与卵块指数相对番茄栽培品种‘Rutgers’更低。基于繁殖系数的评判结果表明，‘Maguary’对该植物线虫表现为免疫型，‘Afruvec’表现为抗病型，而番茄栽培品种‘Rutgers’则为感病型。