为了达到甜菜块根丰产高糖及多抗的育种目标,过去及现在在选育方法上主要是生育期间选择抗病株,收获时再从抗病株中选择根重大含糖高的块根。用这种方法收到了明显的育种效果,根中含糖率由二百年前的3—4%,上升到现在的16—17%,个别品种甚至高达24%以上,块根产量达2～3吨/亩,最高可达5吨/亩以上。但是,这种方法对进 In order to achieve the goal of high sugar content and high resistance to beet root tuber, the past and present selection method is mainly to select the resistant strain during the growth period, and then select the root with large sugary height from the diseased plants at harvest. Significant breeding effects have been received in this way, with sugar content rising from 3-4% in 200 years ago to 16-17% now, even up to 24% in some varieties and up to 2-3 in roots Ton / mu, up to 5 tons / mu or more. However, this approach to progress