An overview of transgenic pea development. (a) Seed surface sterilization and overnight soaking in sterile distilled water (Days 1–2). (b) Explants(embryo slices)
preparation and inoculation withAgrobacteriumsuspension harboring transformation vector (Days 2). (c) Co-cultivation of explants for 3–4 days under dark condition at
22 ± 2C (Days 2–6). (d) Multiple shoot induction from co-cultivated explants on MST medium for 10 days under 16/8 h light/dark at 22 ± 2C (Days 6–16). (e) Selective
regeneration of shoots on P2 medium supplemented with 2.5–10 mg/l PPT at 3 weeks interval (Days 16–90). (f) Putative transgenic shoots on P2 medium supplemented with
10 mg/l PPT ready for micro-grafting. (g) Recovery of putative transgenic shoots through micro-grafting on seedling rootstock (The arrow indicatesthe graft union tied with
tape). During the first two weeks, it was necessary to maintain high relative humidity around the grafted shoots in order to facilitate graft-union healing. (h) Successfully
grafted putative transgenic shoots with flower and pods (arrows). (i) Greenhouse grown subsequent generations