GWAS and multi-omics study reveal OsJAR2 associated jasmonate biosynthesis contributes to Southern rice black-streaked dwarf virus resistance in rice.

ABSTRACT:

Background

Southern rice black-streaked dwarf virus (SRBSDV), transmitted by the white-backed planthopper (WBPH), causes severe yield losses in rice across Asia. However, elite resistant germplasms and molecular defense mechanisms remain elusive, hindering breeding efforts.

Results

Screening of 195 international diverse rice accessions identified a highly resistant (up to 0% disease incidence) variety (R91), exhibiting dual resistance to SRBSDV and rice black-streaked dwarf virus (RBSDV). Multi-omics analysis revealed a rapid defense activation in R91, with an increase in Jasmonic Acid (JA) and Jasmonic Acid-Isoleucine (JA-Ile) by 5 days post-inoculation (dpi), along with upregulation of more than 2,000 defense genes. In contract, susceptible line showed declining JA and JA-

SUBMITTER: Nie S 

PROVIDER: S-EPMC12574106 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature