Department of Plant Pathology, North Dakota State University, Fargo, ND 58102.
Department of Plant Sciences, North Dakota State University, Fargo, ND 58102.
Plant Dis. 2023 Dec;107(12):3817-3824. doi: 10.1094/PDIS-03-23-0590-RE. Epub 2023 Nov 28.
Root-lesion nematode (RLN; ) is a migratory endoparasite and a major soilborne pathogen that affects wheat ( spp.) production worldwide. Genetic resistance is one of the most economical and effective ways to manage in wheat. This study evaluated 37 local cultivars and germplasm lines in seven greenhouse experiments, including 26 hexaploid wheat, six durum wheat, two synthetic hexaploid wheat, one emmer wheat, and two triticale for resistance from 2016 to 2020. North Dakota field soils infested with two RLN populations (350 to 1,125 nematodes per kilogram of soil) were used for resistance screening under controlled greenhouse conditions. The final nematode population density for each cultivar and line was counted under the microscope to categorize the resistance ranking of these entries as resistant, moderately resistant, moderately susceptible, and susceptible. Out of the 37 cultivars and lines, one was classified as resistant (Brennan); 18 were moderately resistant (Divide, Carpio, Prosper, Advance, Alkabo, SY Soren, Barlow, Bolles, Select, Faller, Briggs, WB Mayville, SY Ingmar, W7984, PI 626573, Ben, Grandin, and Villax St. Jose); 11 were moderately susceptible; and seven were susceptible to . The resistant to moderately resistant lines identified in this study could be used in breeding programs after the resistance genes or loci are further elucidated. This research provides valuable information about resistance among wheat and triticale cultivars used in the Upper Midwest region of the United States.
根结线虫（RLN； ）是一种迁移内寄生线虫，也是一种主要的土传病原体，影响着全球小麦（ spp.）的生产。遗传抗性是管理小麦中 的最经济和有效的方法之一。本研究在 2016 年至 2020 年的七个温室试验中评估了 37 个当地品种和种质系，包括 26 个六倍体小麦、6 个杜伦小麦、2 个合成六倍体小麦、1 个普通小麦和 2 个黑小麦，以评估其对 的抗性。北达科他州受两种 RLN 种群（每千克土壤中 350 至 1125 条线虫）感染的田间土壤用于在受控温室条件下进行抗性筛选。在显微镜下对每个品种和系的最终线虫种群密度进行计数，以将这些品系的抗性等级分类为抗性、中度抗性、中度敏感和敏感。在 37 个品种和系中，有一个被归类为抗性（Brennan）；18 个为中度抗性（Divide、Carpio、Prosper、Advance、Alkabo、SY Soren、Barlow、Bolles、Select、Faller、Briggs、WB Mayville、SY Ingmar、W7984、PI 626573、Ben、Grandin 和 Villax St. Jose）；11 个为中度敏感；7 个为敏感。本研究中鉴定的抗性到中度抗性系在进一步阐明抗性基因或基因座后可用于育种计划。这项研究提供了有关美国中西部地区小麦和黑小麦品种中 抗性的有价值信息。
