【摘要】 瓜类细菌性果斑病严重危害新疆乃至我国甜瓜产业的健康发展。选育抗病品种是最有效的病害防治方法，然而目前新疆地区缺乏免疫或者高抗的甜瓜品种。本文评估了西瓜噬酸菌对新疆地区主栽甜瓜品种种子发芽的影响、甜瓜幼苗发病的影响以及甜瓜品种对瓜类细菌性果斑病的抗病性，为选育抗病品种提供理论依据及种质资源。使用西瓜噬酸菌Paracidovorax citrulliⅠ组菌株和Ⅱ组菌株分别对6个品种的甜瓜种子进行人工接菌，其发芽率和病苗率结果表明，人工接菌不影响甜瓜种子的发芽，根长与清水对照相比无显著差异；接菌种子播种后第17天，6个品种之间的病苗率存在显著差异。使用喷雾接种法对12个甜瓜品种的苗期抗性评价结果表明，12个品种中无高抗和免疫的品种，‘科宝留香2号’‘蜜甜17号’‘益抗伽师瓜’‘玉如依力’4个品种对果斑病菌Ⅰ组和Ⅱ组菌株均表现为抗病。更多还原

【Abstract】 Bacterial fruit blotch(BFB), caused by Paracidovorax citrulli, threatens the sustainable development of the melon industry in Xinjiang and across China. Breeding resistant cultivars is the most effective control strategy, however, immune or highly resistant Xinjiang melon varieties are currently lacking. Here, the effects of P.citrulli on seed germination and seedling disease incidence of major Xinjiang melon cultivars and seedling resistance to BFB were evaluated. Seeds from six varieties were artificially inoculated with P.citrulli group Ⅰ and group Ⅱ strains, respectively. Germination rate and and root length were not significantly affected compared to the control group, whereas by 17 days after sowing, diseased seedling incidence differed significantly among varieties. In spray-inoculation assays at the seedling stage across 12 melon varieties, none exhibited immunity or high resistance. Four varieties(‘Kebaoliuxiang No.2’ ‘Mitian No.17’ ‘Yikangjiashigua’ and ‘Yuruyili’) showed resistance to both group Ⅰ and group Ⅱ P.citrulli strains.更多还原