Fig. 2

Characterization of the anthocyanin-related GST gene (Bract1) in Euphorbia pulcherrima. a Schematic representation of the full-length sequence (2314 bp) of Bract1 in the ‘Vintage’ variety. Black arrows represent the exonic regions. Black lines represent the intronic regions. The red square represents the location of the tetranucleotide motif SSR locus (CTTC₃). b Nucleotide alignment of the Bract1 CDS for 14 red- and white-bracted poinsettia varieties. The figure shows a 100 bp region of the CDS in which a 4 bp deletion (red box) is observed only in the white varieties. Black arrows below the sequences show the location of the sequences in each exon. The first sequence corresponds to Bract1 from the ‘Vintage’ variety and was used as a reference for the alignment