1952年詹森提出,通过混合某些亲和的燕麦纯系的种子就可产生多系品种。布劳格等人(1953,1959)曾报导用修改过的回交育种法培育出多系小麦“亚奎50”。然而,由于半矮型小麦的问世,致使高秆的亚奎50的研究停顿了下来。最先投入生产的小麦多系品种是“马瑞马尔63”,已在哥伧比亚推广(Anon,1963)。马瑞马尔63是由10个“弗若考尔”回交品系组 In 1952 Jensen proposed that multi-line varieties can be produced by mixing seeds of some sweet oats with pure lines. Bragg et al. (1953, 1959) reported the breeding of a multi-line wheat “Yakui 50” with a modified backcross breeding method. However, due to the advent of semidwarf wheat, the study of the tall stalky kui 50 has been halted. The first multi-line wheat variety that was put into production was “Marimar 63”, which has been introduced in Colombia (Anon, 1963). Maramar 63 is made up of 10 “Freaux” backcross groups