The use of living organisms to make or develop or modify products is under the broad field of biotechnology. Plant biotechnology is a branch of this discipline that is concerned with the application of the techniques of biotechnology for plant breeding and improvement. Some of the objectives include improving plant quality, increasing crop yield, increasing tolerance to environmental stresses, viruses, fungi, bacteria and pests. Such modifications are of immense use in agriculture. The techniques of marker assisted selection, doubled haploidy, reverse breeding and genetic modification facilitate such changes. This book is compiled in such a manner, that it will provide in-depth knowledge about the theory and practice of plant biotechnology. It aims to shed light on some of the unexplored aspects of this field. This book is an essential guide for both academicians and those who wish to pursue this discipline further.