Mutation breeding,a known well established technique complementary to conventional breeding method.In this book, the induced mutagenesis in groundnut in inquire into the relation effect of mutagen on the genotype VRI-2 in enhancing variability of different traits and in altering the association of characters and in producing deviants of importance and value in morphological and productive traits have been discussed.This can be used as a text/reference book in Botany,Life science and Agricultural science and also be useful to researches who are concerned with crop breeding.I am to grateful to authorities of Annamalai university for their permission to write this book.