玉米双杂交种的育成是世界农业生产上的一次革命,它为玉米育种开辟了一条新路;中国育种家培育玉米单杂交种成功,标志着玉米育种进入一个新阶段,并显著地提高玉米产量。4 单杂交种的培育和紧凑型玉米的推广20世纪60年代末至70年代初,一场突发的“文化革命”使发展杂交玉米育种10年规划流产,大部分科研院所解散或下放,农业教育和科学研 Breeding of two-hybrid corn is a revolution in agricultural production in the world, which opens a new path for maize breeding. The success of Chinese breeders cultivating single hybrid corn shows that maize breeding has entered a new stage and markedly increased the yield of maize . Cultivation of single hybrids and popularization of compact corn A sudden “Cultural Revolution” in the late 1960s and early 1970s led to the abortion of 10-year hybrid maize breeding programs and the dissolution or decentralization of most scientific research institutes. Agricultural Education and Scientific Research