The test tube micro--selection and breeding fo tree is a new typeof genetic breeding system for tree selection, introduction, breeding andreproduction. Beside utilizing natural variation .and variations created bynormal breeding, it can create new genetic variations by ways of monop-loid cultivation, protoplast cultivation and cell hybridization, clone varia-tions of vegetative cell and gamete, rejuvenation through detoxication,genetic engineering etc. In this system, it is quite easy to design micro-enviro...