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Fig. S1. The ectopic expression of RoKSN in the rootstock of R. hybrida ‘RI’ did not influence flowering of the scion.

Fig. S2. R. hybrid ‘RI’ genotype is homozygous at the RoKSN locus with only the copia allele.

Table S1 List of vectors used in this study

Table S2 List of primers used in this study

Table S3 List of media used for regeneration and transformation of rose

Table S4 Flowering time of A. thaliana mutant complemented with rose floral genes

Table S5 Flowering times of T2 transgenic Arabidopsis tfl1 mutants that ectopically expressed RoKSN