Tree breeding is the application of genetic, reproductive biology and economic principles to the genetic improvement and management of forest trees. In contrast to the selective breeding of livestock, arable crops, and horticultural flowers over the last few centuries, the breeding of trees, with the exception of fruit trees, is a relatively recent occurrence. The topics of different chapters have so chosen as to give a comprehensive idea about forest genetics and tree breeding. Forests have multiple roles, including, traditional timber and fibre production, to sequestering global carbon emissions, preserving water systems and providing ecosystem services and shelter. This book is an invaluable resource for researchers, agriculturists, plant breeders and students working with genetics and breeding of forest trees.