Leaf Na+ effects and multi-trait GWAS point to salt exclusion as the key mechanism for reproductive stage salinity tolerance in rice.

ABSTRACT:

Background and aims

Since salinity stress may occur across stages of rice (Oryza sativa) crop growth, understanding the effects of salinity at the reproductive stage is important, although it has been much less studied than at the seedling stage.

Methods

Lines from the Rice Diversity Panel 1 (RDP1) and the 3000 Rice Genomes (3KRG) were used to screen morphological and physiological traits, map loci controlling salinity tolerance through genome-wide association studies (GWAS), and identify favourable haplotypes associated with reproductive stage salinity tolerance.

Key results

Salt exclusion was identified as the key tolerance mechanism in this study, based on reduced panicle length as flag leaf Na+ increased and a lack of effect of trimming the leaves on genotypic ran

SUBMITTER: de Ocampo MP 

PROVIDER: S-EPMC12064422 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature