To better understand the transposition patterns of Tgm9, we identified 124 germinal revertants bearing only purple flowers, each from individual T322 (w4-m) mutable plants (S1 Fig). Therefore, each revertant was unique. We were able to determine insertion sites from 105 mutants (S3 Table). Whether Tgm9 failed to insert into new genetic loci or we failed to recover the insertion sites among the remaining 19 mutants is unknown.