三十年来随着生产的发展,我国生产上应用的小麦品种组成起了重大变化。解放前,生产上应用的品种近1万个。五十年代统计地方品种占81%;选商品种占14.9%;引进品种占4.1%。到七十年代据不完全统计,生产上应用的品种只有1千个左右。而选育品种占91%;引进品种占4%;地方品种占5%。如果按种植面积,则选育品种与引进品种的比 Over the past 30 years, with the development of production, the composition of wheat varieties used in our production has undergone major changes. Before liberation, the production of nearly 10,000 species used. Fiscal statistics in the fifties accounted for 81% of local varieties; commodity selection accounted for 14.9%; imported varieties accounted for 4.1%. According to incomplete statistics in the seventies, only about 1,000 varieties were used in production. Breeding varieties accounted for 91%; introduced varieties accounted for 4%; local varieties accounted for 5%. If by planting area, then breeding varieties and the introduction of species ratio