Developmental stage, organ and tissue-specific expression patterns of BeMADS genes. B. edulis RNA was extracted from different in vitro tissues and subjected to cDNA synthesis: R: roots; L: leaves; S: stems; F: flowers; 1–5: young to old florets, see Additional file 5; and the floral organs Le: lemma; Pa: palea; Lo: lodicules; An: anther; and Pi: pistil. Quantitative RT-PCR was undertaken using the primers in Additional file 6. The B. edulis tubulin gene was used as the internal control. The color intensity is related to the expression level, with darker indicating higher expression. The colors represent the classes of the gene from Figure 3: A: green, B: orange, C: blue, D: grey, E: pink.