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The concept of minimal genome assumes that genomes can be reduced to a bare minimum, given that they contain many non-essential genes of limited or situational importance to the organism. Therefore, if a collection of all the essential genes were put together, a minimum genome could be created artificially in a stable environment. By adding more genes, the creation of an organism of desired properties is possible. The concept of minimal genome arose from the observations that many genes do not appear to be necessary for survival.
Minimal Genome (https://en.wikipedia.org/wiki/Minimal_genome) - wikipedia
Landmark as lab creates synthetic cell with minimum genes needed for life (https://www.theguardian.com/science/2016/mar/24/landmark-lab-creates-synthetic-cell-with-minimum-genes-needed-for-life-craig-ventner)