This book is a comprehensive account of Mutagenesis and Cytotoxicity. it contains eight chapters which are updated with recent research trends. It is beneficial and reference book for all the researchers who are working on mutagenesis and cytotoxicity. The mutagenesis aims to create novel genetic variability which is highly beneficial for crop improvement so it is a powerful tool to improve the agronomic characters of plant species. The book contains a detailed account of chromosomal aberrations and throws light on their causes and consequences. The recent information on chlorophyll mutations is a detailed outcome of authors own research on legumes. The chapters are explained with field diagram which author has himself taken during his research on Broad bean.