the mutation L–R in the CDS of pds (green) conferring resistance to norflurazon is indicated in purple. The map of pBS–pds short is presented with confirmed insertion options for transgenes 5′ and 3′ of the selection marker using the polylinker sequences bordering the pds cassette in pBS–pds. pBS–pds long is of exactly the same structure with a 1000 bp promoter region longer. B. linear fragments of pds with insertion of Gene 1, Gene 2 or both.