Besides the traditional breeding & screening techniques, biotechnological and molecular mappings are useful to identify the resistance genes at selection stage. So, it is possible to screen the susceptible clones prior to release and spread at agriculture sector. This book deals with the background uses, methods, case studies regarding molecular and biotechnological tools used in identification and characterizations of genes against specific traits or disease. It will be useful addition for the scientist, students working on the aspect of genes and molecular mappings for crops especially wheat. This book has complete description of methods, interpretation of results and discussions with references. This book has been written in simple English, easily understandable figures and tables. By studying of this book, students & scientists can perform experiments independently. Although much literature is available regarding these topics but not so descriptive, comprehensive, simple explanatory & brief as this book has. His book is equally important for scientist, undergraduate, graduate & doctorate students within low price.