The science of crop breeding delves into the study of genetics of plants to develop desirable characteristics. Modern crop breeding builds on the principles of molecular biology and genetics to replace existing and time-intensive classical approaches of selective breeding. This is achieved by developing innovative practices of marker-assisted selection, double haploids and genetic modification. There has been a lot of progress in this field and its applications are being widely used and studied. Some of the diverse topics covered in this book address the multiple branches that fall under this category. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. The book includes contributions of experts and scientists, which will provide innovative insights into this field.