农业学大寨群众运动不断深入发展,农业生产水平不断提高,对农作物的良种选育工作提出了日益迫切的要求。许多单位采用常规育种法育成不少优良品种,为农业生产的迅速发展起到积极作用。但是,采用常规育种法,手续繁琐,周期性 Agriculture Studies The mass movement of Dazhai continues to develop in depth and the level of agricultural production has been constantly raised, raising ever-increasing demands on the breeding of improved varieties of crops. Many units using conventional breeding method into a lot of fine varieties, for the rapid development of agricultural production has played a positive role. However, using conventional breeding method, the procedure is cumbersome and periodic