Recent advances in genomics‐assisted breeding of brown planthopper (<i>Nilaparvata lugens</i>) resistance in rice (<i>Oryza sativa</i>)

Abstract

Abstract Brown planthopper (BPH), Nilaparvata lugens (Stål), is one of the most destructive insects that impair rice productivity per year. Till to date, 38 BPH resistance loci have been mapped from cultivated and wild species of rice. Of 38 resistance genes, eight genes ( Bph14, Bph3, Bph26, bph29, Bph18, Bph6, Bph32 and Bph9 ) were positionally cloned. Four genes ( Bph14, Bph26, Bph18 and Bph9 ) encode a typical CC‐NBS‐LRR domain‐containing protein. The Bph3 encodes a cluster of three Lectin Receptor Kinase genes ( OsLecRK1‐3 ) that confer broad‐spectrum resistance. Numerous other genes including WRKY , MYB , DELLA , OsGID1 , CYP71A1 , mitogen‐activated protein kinase and micro RNAs have been functionally characterized that mediate resistance response to BPH. The comparative gene expression profiling, transcriptomics, proteomics and metabolomics studies have also accelerated the resistance breeding programme. In this review, we comprehensively updated the advances made in the identification of the BPH resistance genes and their functional validation to understand the molecular basis of host–BPH interaction. We also discuss the potential utility of the cutting‐edge genomics tools for breeding BPH resistance cultivars.