Method for producing ultraviolet resistant trees and forming woods and forests comprises planting seedlings whose chromosomes ploid is multiploid such as triploid or tetraploid obtained by breeding mutation or artificial crossing

摘要

An ultraviolet resistant tree produced by planting seedlings of particularly Japanese cedar and cypress whose chromosomes ploid is multiploid species such as triploid or tetraploid obtained by increasing the basic number of chromosomes by breed mutation or artificial crossing. An Independent claim is included for planting woods and forests with ultraviolet resistant trees.