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通过三年三点甜菜丛根病（Rhizomania中等发病地块和严重发病地块试验表明：德国引进的6个抗甜菜丛根病雄性不育系杂交税均具有较高的抗病性，其块根产量、糖产量分别比对照工农二号平均增产419．8％和463．3％，含糖率增加3．9度；外引雄性不育系与自育自交系酪制的7个杂交种?
Three years of three-year beet rhizome disease (Rhizomania moderate disease and severe disease plots showed that: Germany introduced six anti-beet root disease male sterility hybrid tax has a high resistance to disease, the root The yield and the yield of sugar increased by 419.8% and 463.3% respectively on the average and the sugar content increased by 3.9% and 3.9% respectively. The seven hybrids ?