甜菜多倍体新品种双丰309的选育

甜菜多倍体新品种双丰309由四倍体双丰416的3个系号与二倍体双丰8号杂交育成，属于工艺品质优良的标准型多粒种多倍体品种。其糖汁纯度较对照品种双丰8号提高3～6个百分点，α-氨基氮含量低27．2％，钠含量低16％，糖份回收率提高5个百分点。该品种在黑龙江省甜菜品区域试验及生产示范中，其平均块根产量、含糖率和产糖量比统一对照品种双丰8号（CK）提高10．9～11．5％、0．21～0．44度和12．9～14．3％。在全国甜菜品种区域试验中，块根产量比当地对照品种提高13．3％，含糖率提高0．6度，产糖量提高18．9％。

The Breeding of Sugarbeet Polyploid Variety Shuangfeng 309

The sugarbeet polyploid multigerm variety Shuangfeng 309 was bredby crossing three lines of sugarbeet tetraploid variety shuangfeng 415 withdiploid yariety Shuangfeng 8. Its economical character belongs to the Ntypp in sugarbeet varieties. This variety has better technoligical qualitythan variety Shuangfeng 8 (CK) with increasing juice purity and sugarrecovery by 3-6 and 5 percent point, lowering the content of a- aminonitrogen and sodium by 27. 2% and 16 %. The average root yield, sugarcontent and sugar yield of the yariety was over the CK with 10. 9-11. 5%0. 21-0. 44 % and 12. 9-14. 3 % in Heilongjiang sugarbeet variety regionaltest and production demonstration and over the local check yarieties with13. 3 %, 0. 7% and 18. 9%in the national sugarbeet yariety regional test.