Centre for Functional Ecology-Science for People and the Planet (CFE), Department of Life Sciences, University of Coimbra, 3000-456, Coimbra, Portugal.
Polytechnic Institute of Coimbra, High School of Agriculture, Department of Agronomic Sciences and Research Centre for Natural Resources, Environment and Society (CERNAS), Bencanta, 3045-601, Coimbra, Portugal.
Sci Rep. 2021 Feb 10;11(1):3484. doi: 10.1038/s41598-020-77905-2.
Root-knot nematodes (RKN), Meloidogyne spp., are important crop pests that cause severe losses in crop production worldwide, reducing both productivity and crop quality. Meloidogyne chitwoodi Golden, O'Bannon, Santo & Finley, 1980 is considered a quarantine organism by the European and Mediterranean Plant Protection Organization (EPPO) causing damage in tomato and potato crops. The development of nonchemical and sustainable management strategies to reduce nematode damage is crucial. The resistance of Solanum linnaeanum Hepper & P.-M.L. Jaeger and S. sisymbriifolium Lamarck cv. Sis 6001 to M. chitwoodi was evaluated based on gall index (GI), the Bridge & Page (1980) rating chart and reproduction factor (RF). Both plant species were resistant to M. chitwoodi. Solanum linnaeanum had an average of 519 small root swellings/plant, with 45% adult nematodes inside the roots, all males. Solanum sisymbriifolium had GI ≤ 2 and RF ≤ 1 with a high percentage (69%) of nematodes inside the roots that did not develop beyond the sexually undifferentiated second-stage. The use of S. linnaeanum as a new source of resistance is a good alternative for the control of RKN in the quest to develop nonchemical and sustainable management strategies to protect crops.
根结线虫（RKN），Meloidogyne 属，是重要的作物害虫，在全球范围内造成严重的作物减产，降低生产力和作物质量。Meloidogyne chitwoodi Golden、O'Bannon、Santo 和 Finley，1980 年被欧洲和地中海植物保护组织（EPPO）视为检疫性生物，对番茄和马铃薯作物造成损害。开发非化学和可持续的管理策略来减少线虫损害至关重要。评估了 Solanum linnaeanum Hepper 和 P.-M.L. Jaeger 以及 S. sisymbriifolium Lamarck cv. Sis 6001 对 M. chitwoodi 的抗性，基于根结指数（GI）、Bridge 和 Page（1980）评级图表和繁殖因子（RF）。这两个植物物种都对 M. chitwoodi 具有抗性。Solanum linnaeanum 每株平均有 519 个小根肿，45%的成年线虫在根内，均为雄性。Solanum sisymbriifolium 的 GI≤2 和 RF≤1，根内有很高比例（69%）的线虫没有发育到性未分化的第二阶段。利用 Solanum linnaeanum 作为新的抗性来源是控制 RKN 的一种很好的替代方法，有助于开发非化学和可持续的管理策略来保护作物。
