【摘要】 本文讨论了甜菜品种的逐级杂种优势利用的育种技术路线及建立与之相适应的良种繁育程序的技术与理论。认为稳定的世代间不发生或少发生分离的杂种优势为逐级杂种优势利用改良种性提供了可能。这种原种的初级杂种优势和生产用种的次级杂种优势的复合余种优势的现代品种要求建立“原种一生产用种”两级繁育体系。其技术核心是系号的选择、维持和提高而不是传统良种繁育的群体混合含糖选择技术。育种家和育种机构为“两级制”繁育体系提供了技术保障和现实选择。更多还原

【Abstract】 This paper discussed the breeding of gradual heterosis utiiization and change of seed production program. Stable heterosis in different generation is possible for using gradual generation heterosis. The primary heterosis of breeder’s seed and the secondary heterosis of commercial seed formed morden Varieties. The mordern yariety need to establish breeder’s seed-comtnercial seed program. Producing technique are not mixing mass sugar content selection and the selection maintance and improvement of different systems Breeder and Breeding organization giye the possibility of techiques in such seed production program更多还原