Abstract
Biotechnology in forest tree breeding research in Japan is summarized including some important research held in abroad. In DNA analysis it is very important to select adequate kind of marker for each purpose. Methods and current status of marker aided selection and quantitative trait locus (QTL) analysis are discussed. As somatic embryogenesis is a promising method in tissue culture, its research process in Japanese tree species is summarized. Genetic modification system in Japanese cedar and Japanese cypress is introduced. The future of tree breeding using biotechnology is discussed.
