Genetic Analysis and Gene Mapping of Whitebacked Planthopper Resistance Genes from Rice Varieties

文献类型： 外文期刊

第一作者： Nong, Baoxuan

作者： Nong, Baoxuan;Nong, Baoxuan;Xu, Anlong;He, Wenai;Qiu, Yongfu;Wu, Biqiu

作者机构：

关键词： Whitebacked planthopper (WBPH); Sogatella furcifera (Horvath); Rice; Resistance gene; Gene mapping; Honeydew excretion

期刊名称：PAKISTAN JOURNAL OF ZOOLOGY （ 影响因子：0.6； 五年影响因子：0.7 ）

ISSN： 0030-9923

年卷期： 2023 年 55 卷 6 期

页码：

收录情况： SCI

摘要： The whitebacked planthopper (WBPH), also named Sogatella furcifera (Horvath), has become a significant threat to rice production. Identification of WBPH-resistant germplasm and genes can promote the development of resistance varieties and effectively limit pest damage. In this study, fourteen varieties of rice were surveyed for insect resistance by assessing growth rates via seedbox screening, feeding activity via measurements of honeydew excretion, and insect development by counting the number of hatched nymphs. Two resistance varieties N22 and OB677 were crossed with susceptible line 9311 to develop mapping populations, which were applied to map the resistance genes/QTLs. In the results, rice variety PTB33 showed high resistance to both brown planthopper (BPH) and WBPH, varieties N22, RBPH327, and OB677 showed moderate resistance to WBPH. Host choice test and seedling survival rates further verified the WBPH resistance of PTB33, N22, and OB677. By using two F 2 mapping populations, two WBPH resistance genes were detected in N22 and OB677. Wbph1 was mapped on chromosome 2 of N22 in a region that harbored the markers RM13650 and RM13478. Its largest logarithm of the odds (LOD) score was 3.94, which explained a 16.6% of the phenotypic variation. Wbph9 was mapped on chromosome 3 of OB677, where it was flanked by markers RM3513 and RM3525. It had a LOD score of 3.4, explaining a 17.2% of the phenotypic variation. Four varieties PTB33, N22, RBPH327, and OB677 showed resistance to WBPH, of which OB677 was a novel resistance germplasm; and a novel resistance gene Wbph9 was mapped on chromosome 3. In conclusion, four WBPH resistance varieties were detected and one novel resistance gene was mapped.

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