Genome-wide association mapping and transcriptional analysis uncover genetic determinants of minor tocopherols in rice seeds.

ABSTRACT: Despite the nutritional importance of tocopherols, current knowledge of the genetic architecture underlying the accumulation of minor tocopherols-gamma (γ) and delta (δ)-in rice (Oryza sativa L.) grains remains limited. In this study, we investigated the genetic basis of γ- and δ-tocopherol contents in rice using a genome-wide association study (GWAS) and post-GWAS analysis. Accordingly, 34,323 SNP markers were obtained from 179 genotypically diverse accessions of O. sativa. Minor tocopherol contents had a strong positive correlation (r = 0.76) with each other and varied greatly across the accessions: 0.015-1.74 and 0.005-0.81 (µg/g) for γ and δ, respectively. A total of 18 QTL on nine rice chromosomes were mapped. Eight transcription factor (TF) genes, five lncRNAs, and two transposons we

SUBMITTER: Kazemzadeh S 

PROVIDER: S-EPMC12325677 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature