After identifying a useful gene in bacteria, following steps should be undertaken:

$(i)$ Isolation of useful gene using Restriction Endonucleases

$(ii)$ Transferring the gene to a suitable vector to create a recombinant $DNA$ molecule

$(iii)$Transfer of these recombinant $DNA$ molecules to the target cells

$(iv)$ Screening of cells for transformation

$(v)$ Selection of transformed cells

$(vi)$ Regeneration of plants from the transformed cells to get transgenic plants.