数字农科院2.0

Identification Of A Novel Locus, Bph38(T), Conferring Resistance To Brown Planthopper (Nilaparvata Lugens Stal.) Using Early Backcross Population In Rice (Oryza Sativa L.)

文献类型： 外文期刊

作者： Balachiranjeevi, CH; Prahalada, GD; Mahender, A; Jamaloddin, M; Sevilla, MAL; Marfori-Nazarea, CM; Vinarao, R; Sushanto, U; Baehaki, SE; Li, ZK; Ali, J

作者机构：

关键词： Brown Planthopper; Qtl Mapping; Resistance; Mas; Early Backcross Population

期刊名称： EUPHYTICA

ISSN： 0014-2336

年卷期： 2019 年 215 卷 11 期

页码：

收录情况： JCR（2021版）

摘要： Rice is the most important staple food crop, and it feeds more than half of the world population. Brown planthopper (BPH) is a major insect pest of rice that causes 20-80% yield loss through direct and indirect damage. The identification and use of BPH resistance genes can efficiently manage BPH. A molecular marker-based genetic analysis of BPH resistance was carried out using 101 BC1F5 mapping population derived from a cross between a BPH-resistant indica variety Khazar and an elite BPH-susceptible line Huang-Huan-Zhan. The genetic analysis indicated the existence of Mendelian segregation for BPH resistance. A total of 702 high-quality polymorphic single nucleotide polymorphism (SNP) markers, genotypic data, and precisely estimated BPH scores were used for molecular mapping, which resulted in the identification of the BPH38(t) locus on the long arm of chromosome 1 between SNP markers 693,369 and id 10,112,165 of 496.2 kb in size with LOD of 20.53 and phenotypic variation explained of 35.91%. A total of 71 candidate genes were predicted in the detected locus. Among these candidate genes, LOC_Os01g37260 was found to belong to the FBXL class of F-box protein possessing the LRR domain, which is reported to be involved in biotic stress resistance. Furthermore, background analysis and phenotypic selection resulted in the identification of introgression lines (ILs) possessing at least 90% recurrent parent genome recovery and showing superior performance for several agro-morphological traits. The BPH resistance locus and ILs identified in the present study will be useful in marker-assisted BPH resistance breeding programs.

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