Molecular Mapping of a New Brown Planthopper Resistance Gene Bph43 in Rice (Oryza sativa L.)

Brown planthopper (BPH) has become the most devastating insect pests of rice and a serious threat to production. To combat newly occurring virulent BPH populations, it is still urgent explore more new broad-spectrum resistance genes integrate them into cultivars. In present study, we explored genetic basis in IRGC 8678. We identified mapped gene Bph43 region ~380 kb on chromosome 11. Genes encoding nucleotide-binding domain leucine-rich repeat-containing (NBS-LRR)-type disease proteins or Leucine Rich Repeat family annotated this were predicted as possible candidates for Bph43. Meanwhile, developed near isogenic lines (NIL-Bph43-9311) an elite restorer line 9311 background using marker-assisted selection (MAS). The further characterization NIL-Bph43-9311 demonstrated that confers strong antibiosis antixenosis effects BPH. Comparative transcriptome analysis revealed related defense response gene-dependent signaling pathway significantly uniquely enriched BPH-infested NIL-Bph43-9311. Our work can be deployed valuable donor breeding programs.