This book covers different male sterility systems employed for genetic improvement of vegetable crops. Various aspects such as cytoplasmic male sterility (CMS), genic male sterility (GMS) and cytoplasmic genic male sterility (CGMS), and their exploitation in hybrid breeding of vegetable crops is also discussed. This book provides the timeline of key breakthroughs made in the male sterility systems and their exploitation in vegetable crop improvement. The information compiled is of great relevance to current need of global food security. Precise genome editing through CRISPR/Cas9 and other advanced techniques has made it possible to engineer male sterility in vegetable crops. Due to the pressing issue of climate change, the diversification of cytoplasm is important and hence, the role of alien cytoplasm in developing novel male sterility systems in vegetable crops is also explored. This book is resourceful for the researchers, students, scientists, teachers and private players interested in hybrid vegetable seed industry.