The book has detailed information on genetic diversity of different durum wheat both for agronomic and quality traits. It has basic information on how the genetic makeup of the crop and the environment affect both qualitative and quantitative traits. The relationships between each agronomic and qualitative traits specially important for pasta production was clearly studied and presented. The direct and indirect relationships between each traits also assessed in this book. Generally the book will provide full information how the genetic property of the crop affected by the environment and how this traits will be handled in the research specially for production of heterosis in durum wheat and can be a good research inputs for industries and researchers.