Nucleotide diversity and linkage disequilibrium in antioxidant genes of Brachypodium distachyon

► The average nucleotide diversity in CAT, GPX, DHAR, MDHAR, and APX was 0.0027 in Brachypodium distachyon. ► The average single nucleotide polymorphism frequency was one SNP per 131 bp. ► The linkage disequilibrium decay extended to a distance of 1.2 kb. ► The neighbor-joining tree of accessions based on DHAR, MDHAR, and CAT was analyzed.