Allelic diversity in an NLR gene BPH9 enables rice to combat planthopper variation.

Journal Article

Brown planthopper (BPH), Nilaparvata lugens Stål, is one of the most devastating insect pests of rice (Oryza sativa L.). Currently, 30 BPH-resistance genes have been genetically defined, most of which are clustered on specific chromosome regions. Here, we describe molecular cloning and characterization of a BPH-resistance gene, BPH9 , mapped on the long arm of rice chromosome 12 (12L). BPH9 encodes a rare type of nucleotide-binding and leucine-rich repeat (NLR)-containing protein that localizes to the endomembrane system and causes a cell death phenotype. BPH9 activates salicylic acid- and jasmonic acid-signaling pathways in rice plants and confers both antixenosis and antibiosis to BPH. We further demonstrated that the eight BPH-resistance genes that are clustered on chromosome 12L, including the widely used BPH1 , are allelic with each other. To honor the priority in the literature, we thus designated this locus as BPH1/9 These eight genes can be classified into four allelotypes, BPH1/9-1 , -2 , -7 , and -9 These allelotypes confer varying levels of resistance to different biotypes of BPH. The coding region of BPH1/9 shows a high level of diversity in rice germplasm. Homologous fragments of the nucleotide-binding (NB) and leucine-rich repeat (LRR) domains exist, which might have served as a repository for generating allele diversity. Our findings reveal a rice plant strategy for modifying the genetic information to gain the upper hand in the struggle against insect herbivores. Further exploration of natural allelic variation and artificial shuffling within this gene may allow breeding to be tailored to control emerging biotypes of BPH.

Full Text

Duke Authors

Cited Authors

  • Zhao, Y; Huang, J; Wang, Z; Jing, S; Wang, Y; Ouyang, Y; Cai, B; Xin, X-F; Liu, X; Zhang, C; Pan, Y; Ma, R; Li, Q; Jiang, W; Zeng, Y; Shangguan, X; Wang, H; Du, B; Zhu, L; Xu, X; Feng, Y-Q; He, SY; Chen, R; Zhang, Q; He, G

Published Date

  • November 2016

Published In

Volume / Issue

  • 113 / 45

Start / End Page

  • 12850 - 12855

PubMed ID

  • 27791169

Pubmed Central ID

  • 27791169

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.1614862113

Language

  • eng