There is no difference between artificially produced induced mutants and spontaneous mutants found in nature. Compared to cross-breeding, special care is
taken in selecting homozygous, non-chimerical mutant lines when working with artificially induced mutants. To achieve this, induced mutants are passed through several generations of selfing
(in order to achieve homozygosity); or clonal propagation, usually through in vitro techniques (in order to dissociate chimeras). This is exactly what happens in nature (through evolution)
and leads to the fixation of the mutation events. All that plant breeders do is mimic nature in this regard. It should also be noted that in most cases, the induced mutants are merely "raw materials"
that in order for their potentials to be realized must be integrated into established breeding schemes through hybridizations and repeated backcrosses. Like in all such processes that involve
crossing, care should be taken to eliminate linkage drags of agronomically unfavorable alleles as such mediocre or undesirable alleles could show up in subsequent generations through
segregation.