Mutation is sudden heritable change in DNA sequence which leads to change in characteristics of an organism as classically defined by Hugo de Vries in 1900. It is the phenomenon of a sudden intermittent change in the hereditary character. In vegetable breeding Mutagenesis have a great importance. Mutagenesis is all about treating a biological material with a mutagen in order to induce mutations. The entire operation of the mutation induction & isolation of mutants for crop improvement is called as 'Mutation breeding'.