The book entitled "Genetic Improvement in Rice" had mainly been written based on field research data which helps agricultural students, teachers, researchers and scientists to prepare any project and research about paddy crop. This book comprises of various chapters i.e. introduction, review of literature, material and methods, results, discussion and summary. This book provide whole knowledge about rice crop like their classification, floral biology, taxonomy, morphology, combining ability, vigor of hybrids, nutritional value, export data, and area, production and productivity of rice in India, Rajasthan and Kota division. Great focuses on combining ability of genotypes which are used for improvement in crop diversity, stress tolerance, quality and yield.