Comprehensive Morphological and Molecular Insights into Drought Tolerance Variation at Germination Stage in <i>Brassica napus</i> Accessions.

ABSTRACT: Drought constitutes a noteworthy abiotic stressor, detrimentally impacting seed germination, plant development, and agricultural yield. In response to the threats imposed by climate change and water paucity, this study examined the morphological divergence and genetic governance of drought resilience traits at the germination stage in 196 rapeseed (Brassica napus L.) lines under both normal (0 MPa) and drought-induced stress (-0.8 MPa) scenarios. Our study showed that the composite drought tolerance D value is a reliable index for identifying drought resilience. Through a genome-wide association study (GWAS), we uncovered 37 significant SNP loci and 136 putative genes linked to drought tolerance based on the D value. A key discovery included the gene BnaA01g29390D (BnNCED3),

SUBMITTER: Lu G 

PROVIDER: S-EPMC11644293 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature