A modified vector comprising a reporter gene having a STOP codon upstream of the multiple cloning site of the vector which is characterized in that the recombinant clones show fluoresce or show color in presence of inducer. A method for identification and selection of recombinant clones comprising the modified vector wherein the recombinant clones florescence or show color in a suitable suppressor strain of the STOP codon associated with the gene of interest. A method of preparation of recombinant clone comprising gene of interest and modified vector comprising amplification of gene of interest using specific primers containing STOP codon different from STOP codon used with reporter gene; cloning the amplified gene of interest in the modified vector; transformation of cloned modified vector in the STOP codon suppressor host cell wherein the STOP codon suppressor host cell is specific for STOP codon used with the gene of interest wherein the recombinant clones either fluorescence or show color depending upon the reporter gene used.