Plant breeding is an applied branch of botany that deals with the improvement of Agricultural crops. Plant breeding science has crucial role to increase the productivity of the crop plants to fulfill the huge demand of the food. Breeding new crops is important to develop new varieties which are high-yielding, biotic and abiotic stress tolerant, and better adaptable to different environmental and climatic conditions. The book has been written in the form of a manual which is very useful for various graduate students. Students' success depends on practical knowledge, acquiring the minimal skills to perform basic procedures can be obtained by several means. Hybridization technique in major field crops is very beneficial to graduate level Students.