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Resistance analysis of the rice variety Huaidao 5 against root-knot nematode Meloidogyne graminicola

文献类型： 外文期刊

作者： Feng, Hui 1 ; Zhou, Can-rong 1 ; Zhu, Feng 2 ; Le, Xiu-hu 3 ; Jing, De-dao 4 ; Daly, Paul 1 ; Zhou, Dong-mei 1 ; Wei, Li-hui 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China

2.Plant Protect & Quarantine Stn Jiangsu Prov, Nanjing 210009, Peoples R China

3.Hebei Univ Engn, Sch Landscape & Ecol Engn, Handan 056038, Peoples R China

4.Zhenjiang Inst Agr Sci Hilly Area Jiangsu Prov, Zhenjiang 212400, Peoples R China

关键词： root-knot nematode; Meloidogyne graminicola; rice; resistance

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.8； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2023 年 22 卷 10 期

页码：

收录情况： SCI

摘要： Meloidogyne graminicola has emerged as one of the most destructive plant-parasitic nematodes affecting rice (Oryza sativa) production worldwide. Resistance to M. graminicola in rice could be the most effective option for its management. However, sources of germplasm with resistance to M. graminicola in rice remain limited. Here, we describe the root attraction, gall formation and genetic analysis of the resistance to M. graminicola in the rice variety Huidao 5. A nematode attraction assay showed that second-stage juveniles (J2s) of M. graminicola were attracted at the root tip of Huaidao 5 within 8 h without a significant reduction in attraction compared to the susceptible rice variety Nanjing 9108. Microscopic observation of the infection revealed that the J2s invaded root tissues 12 h after inoculation, but their subsequent movement to the root tip was hindered in Huaidao 5, resulting in decreased nematode number compared to Nanjing 9108. Additionally, we used the soil and hydroponic culture systems to simulate upland and flooding conditions in the paddy fields respectively, and found that gall number was significantly reduced, and nematode development was clearly suppressed in Huaidao 5. To investigate the genetic basis of this resistance, cross breeding was performed between the Huaidao 5 and Nanjing 9108 varieties. There was no reduction in the resistance of the F1 offspring to M. graminicola in the greenhouse or field trials, suggesting that a dominant gene could control resistance in Huaidao 5. In summary, this study provides a detailed characterization of a novel source of resistance to M. graminicola in rice, which is of great potential for use in crop breeding.

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