Fig. S1 Phylogenetic relationships of grass FUL-like genes and number of associated SPL binding sequences in the putative promoters and introns.

Fig. S2 Andropogoneae species relationships based on combined analyses of waxy, ndhF, phyB, tb1 and tga1-like genes.

Table S1 Species sampled for phylogenetic analyses of tga1 with vouchers and GenBank accession numbers.

Table S2 Species sampled for combined phylogenetic analyses with vouchers and GenBank accession numbers.

Table S3tga1 allele-specific expression assay.

Table S4not1 allele-specific expression assay.

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