抗(耐)甜菜丛根病新品种中甜—双丰317号(张甜301)的选育及应用研究

Breeding and Application Study of New Sugarbeet Variety Shuangfeng 317 (Zhangtian301)with Resistance to Rhizomania

抗（耐）甜菜丛根病新品种中甜—双丰317号（张甜301）是以二倍体抗（耐）丛根病品系抗1和抗褐斑病性强、含糖较高的四倍体双丰415杂交而成的普通多倍体甜菜新品种。该品种块根产量高、含糖中等、工艺品质好、抗（耐）丛根病及褐斑病性强，在1994～1995两年国家“八五”科技攻关抗（耐）甜菜丛根病品种联合区试中达标，平均块根产量为2570.8kg／亩，比对照品种增产512．6％，含糖率（14．61％）提高3．98度，产糖量为359．3kg／亩，比对照增加1036.4％。在内蒙古、宁夏、甘肃、新疆等试验点表现出较强的耐丛根病性。

The new sugarbeet variety Shuangfeng 317(Zhangtian 301) was bred by crossing between breeding lines Kang 1 (diploid) with resistance to Rhizomania and Shuangfeng 415 with resistance to Cerospora and high sugar content,which has characteristics of high root yield, medium sugar content,high juice purity and sugar recovery, and strong resistance to Rhizomania and Cerospora. It reached the standard regulated by the 8th five-year-plan on sugarbeet breeding of resistance to Rhizomania from 1994~ 1995. The average root yield,sugar content and sugar yield was over the CK with 512. 6%,3. 98°S and 1036. 4% respectively in sugar beet variety national regional test. It per formed stronger resistance to Rhizomania than others in Inner Mongolia,Ningxia,Gansu and Xinjiang etc.