Molecular mechanisms of drought resistance using genome-wide association mapping in maize (Zea mays L.).

ABSTRACT:

Background

Drought is a critical abiotic stress that influences maize yield and reduces grain yield when it occurs at the flowering or filling stage. To dissect the genetic architecture of grain yield under drought stress (DS), a genome-wide association analysis was conducted in a maize population composed of diverse inbred lines from five locations under well-watered and DS conditions at flowering in 2019 and 2020.

Results

Using a fixed and random model circulating probability unification model, a total of 147 loci associated with grain yield or the drought resistance index (DRI) were identified, of which 54 loci were associated with a DRI with an average phenotypic variation explanation of 4.03%. Further, 10 of these loci explained more than 10% of the phenotypic variation

SUBMITTER: Ningning Z 

PROVIDER: S-EPMC10557160 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature