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本文通过时双丰系列甜菜多倍体品种的种性介绍及其系谱分析，揭示了双丰系列多倍体品种的遗传构成和血缘来源，双丰多倍体品种共有１２个，参与亲本形成的血缘共有７个。利用天然多交逐级改良种性的逐级杂种优势利用育种技术构成了双丰系列多倍体的育种特色，建立平衡群体和改良平衡群体是双丰系列多倍体育种技术的理论依据。
In this paper, the introduction and phylogenetic analysis of the polyphylla species in Shuangfeng series revealed the genetic constitution and origin of the polyphylla series in Shuangfeng series. Twelve polyphylla species in Shuangfeng were involved in the formation of the parents A total of seven blood. Breeding characteristics of Shuangfeng series polyploid breeds were exploited by the use of natural multi-crossover improvement breeds. The establishment of breed groups and improvement of balance groups were the theoretical basis of Shuangfeng series of polyploid breeds.