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丹玉旅系是我国玉米育种界公认的五大优良自交系之一,为扩增玉米种质资源,培育高产优质杂交种做了巨大贡献。许多育种者对丹玉旅系进行了大量的改良、扩增与创新,选育出旅9、旅9宽、E28、丹340等31个优良自交系,在生产上大面积应用。丹玉旅系改良的成功思路是从变异中选择,旅系间相互改良,旅系与黄改系改良,旅系与综合种的改良。为进一步改良旅系的抗病性、抗倒性、配合力等,探讨新的创新思路:用外杂选亚群自交系改良旅系,用Reid群自交系改良旅系,以提高玉米育种效率和杂种优势利用水平。
Danyu Brigade is one of the five elite inbred lines recognized by China’s corn breeding community. It has made great contributions to the expansion of maize germplasm resources and the cultivation of high-yield and high-quality hybrids. Many breeders made a lot of improvements, amplifications and innovations to Dan Yu Journey. Breeding brigade 9, Brigade 9 wide, E28, Dan 340 and other 31 good inbred lines, large-scale production in the application. Dan Yu Journey to improve the success of the train of thought is to choose from the mutation, mutual improvement between the travel department, the Department of Tourism and the Department of yellow to improve, travel and comprehensive species improvement. In order to further improve the disease resistance, lodging resistance, combining ability and so on, this paper explores new innovative ideas: improving the tourism with out-of-selection sub-population inbred lines and improving travel with Inbreds of Reid Group to improve maize Breeding efficiency and utilization of heterosis.