甜研305是由双丰六号为转育父本、波兰的MS；为母本采用连续回交进行育性转移及筛选改良，经历七代后成系的甜菜雄不育多倍体品种。该品种的雄不育系的不育率高而稳定，一般配合力的效应值高，属丰产偏高糖抗病品种。该品种在黑龙江省、吉林省甜菜品种区域试验及生产示范中，其平均块根产量、含糖率和产糖量分别比对照品种提高11．7％～20．9％、0．59～0．89度和15．8～29．7％，褐斑病发病率低1～1．5级。 Sweet research 305 is Shuangfeng 6 as a transplanting father, Poland MS; for the female parent by continuous backcross fertility transfer and screening to improve, after seven generations of lines of sugarbeet male sterile polyploid varieties. The male sterile lines of this variety have high and stable rates of sterility, high effects of general combining ability, and are high resistant varieties with high yield and high sugar content. The average tuber yield, sugar content and yield of sugar in the regional trials and production demonstration of sugar beet varieties in Heilongjiang Province and Jilin Province increased by 11.7% -20.9% and 0.59-0 respectively compared with the control varieties. 89 degrees and 15.8 ~ 29.7%, the incidence of brown spot is 1 ~ 1.5.