1 选育目的和依据良种是茶叶高产优质的物质基础,茶叶市场的供求变化又反馈制约着茶树育种的目标。茶树为多年生木本作物,其经济树龄长达50年左右,茶园一经建立,品种更新很困难。茶树品种具有特定的适制性,生产单位普遍难于适应红绿茶及名优茶的市场起伏变化需 Breeding purposes and basis Breeding is the material basis of high yield and good quality of tea. The change of supply and demand in the tea market also hinders the goal of tea tree breeding. Tea tree perennial woody crops, the economic age of up to 50 years or so, the establishment of the tea plantation, the species is very difficult to update. Tea varieties have a specific adaptability, the production unit is generally difficult to adapt to the ups and downs of red and green tea and famous tea needs change