Department of Biotechnology, Ghent University, 9000, Ghent, Belgium.
Phytopathology. 2020 Sep;110(9):1572-1577. doi: 10.1094/PHYTO-11-19-0433-R. Epub 2020 Jul 8.
The sedentary root-knot nematodes, spp., and the migratory root-lesion nematodes, spp., cause significant yield losses, particularly in aerobic and upland rice production systems. Recently, the Asian rice accessions LD 24 and Khao Pahk Maw (KPM) were shown to be highly resistant to . In this study, we have analyzed the responses and broadness of resistance of these two rice genotypes to another root-knot nematode . and a root-lesion nematode . . The penetration as well as post-penetration development and reproduction of nematodes were compared including known susceptible and resistant genotypes. Our results indicate that the genotype KPM confers strong resistance to both and , while LD 24 was resistant to and susceptible to . Detailed observations revealed that similar numbers of or penetrated the resistant and susceptible hosts during early infection stages. However, the development and reproduction of both nematodes were arrested or reduced in resistant genotypes, implying that resistance occurs at the post-penetration stage.
半穿刺根结线虫，和穿刺根腐线虫，造成显著的产量损失，特别是在有氧和旱地水稻生产系统中。最近，亚洲水稻品种 LD24 和 Khao Pahk Maw（KPM）被证明对高度抗性。在这项研究中，我们分析了这两个水稻基因型对另一种根结线虫和根腐线虫的反应和广泛抗性。包括已知的敏感和抗性基因型在内，比较了线虫的穿透以及穿透后的发育和繁殖。我们的结果表明，基因型 KPM 对和均具有强抗性，而 LD24 对具有抗性，对敏感。详细观察表明，在早期感染阶段，相同数量的或穿透抗性和敏感宿主。然而，两种线虫的发育和繁殖都在抗性基因型中被阻止或减少，这意味着抗性发生在穿透后阶段。
