Several morphological mutants were previously identified from screening thousands of germinal revertants generated from the T322 (w4-m) mutable line. These mutants include chlorophyll deficient mutants (T323, T325 and T346) [23, 27], male-sterile, female-fertile mutant (T359)  and partial female sterile (fsp) mutants (T364, T365 and T367)  (Table 1). The genes responsible for the mutant phenotypes in these mutants have been previously genetically mapped [29–31]. To determine if the mutations in these mutants were caused by Tgm9-insertion, we identified the Tgm9-insertion sites using a transposon display approach for each of the mutants (S2 Fig).