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Mapping and characterization of a quantitative trait locus resistance to the brown planthopper in the rice variety IR64

文献类型： 外文期刊

作者： Yang, Meng 2 ; Cheng, Ling 3 ; Yan, Liuhui 1 ; Shu, Wan 2 ; Wang, Xinyi 1 ; Qiu, Yongfu 1 ;

作者机构： 1.Guangxi Univ, Agr Coll, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530005, Peoples R China

2.Guangxi Acad Agr Sci, Maize Res Inst, Nanning 530007, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou 434025, Peoples R China

关键词： Brown planthopper (Nilaparvata lugens Stal); Tolerance; Genetic mapping; Preliminary-near-isogenic line (pre-NIL); Insect resistance mechanism

期刊名称：HEREDITAS （ 影响因子：3.271； 五年影响因子：2.807 ）

ISSN： 1601-5223

年卷期： 2019 年 156 卷

页码：

收录情况： SCI

摘要： BackgroundRice planthoppers (main brown planthopper, Nilaparvata lugens Stal; BPH) was one of substantial threats to Asia rice production as its serious destruction and difficulties in control under field conditions. Notably, host-plant resistance was proved to be one of the effective ways to manage the pest. And stronger virulence will probably emergence when continuous use of insecticides. Therefore, more resistance genes with different resistance mechanisms were needed to be detected and then applied in the rice breeding practice.ResultsResistance genes in the rice variety IR64 were evaluated considering the seedling bulk test and seedling survival rate. As a result, a locus with a large LOD score of 7.23 was found between markers RM302 and YM35 on chromosome 1. The locus explained 36.9% of phenotypic variation and was tentatively denominated Bph37. Moreover, Bph1 was detected to be harbored by the markers RM28366 and RM463, and had the largest LOD score of 2.08, explaining 7.7% of phenotypic variance in the same mapping population. Finally, the preliminary-near-isogenic-lines (pre-NILs) carrying Bph37 exhibited significant tolerance to the insects. But no antibiotic or antixenotic effects were observed in the resistant plants when infested with the insects.ConclusionsWe mapped one major BPH resistance gene Bph37 in consideration of seedling survival rate and the resistance lines showed tolerance to BPH. The detected gene should be beneficial for understanding the resistance mechanism of rice to BPH and for insect-resistance rice breeding programs.

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