Haplotypes and predicted cis -acting regulatory elements in the promoter regions of TaGW2-6A and TaGW2-6B. A, two haplotypes were formed by 8 SNPs in the TaGW2-6A promoter region. B, four haplotypes were formed by 11 SNPs in the TaGW2-6B promoter region. The ellipses mean the polymorphic sites where markers were developed. The rectangles mean cis-acting regulatory elements. ABRE, abscisic acid-responsive element; GCN4_motif, endosperm tissue-specific expression; GT1-motif, light responsive element; WUN-motif, wound responsive element; AuxRR-core, auxin responsive element; G-box, light responsive element.