抗病偏高糖甜菜多倍体新品种甜研301的选育

甜研301是在改进多倍体育种技术的基础上育成的甜菜多倍体新品种。抗褐斑病、根腐病,含糖较高,稳产,优于当地推广品种及引进的国外多倍体良种。由于采用重点选择四倍体新本、早代定向培育、多点鉴定和南繁北育等手段,优良性状迅速稳定。种植面积已遍布黑龙江中、北部、吉林西部、辽宁、内蒙东部及北京延庆等地,至1987年已累计推广90余万亩。

Breeding of the Polyploid Sugar Beet Variety Tianyan 301 With Resistance to Diseases and High Sugar Content

Tianyan 301 is a polyploid sugar beet variety which was devaloped by using improved polyploid breeding technique. It resists to leaf spot (Cercospora beticola Sacc) and root rot (Fusarium oxysporum Schl) with high sugar Content and good stability in yield. In production demonstration, its root yield increased by 18.7%,sugar percentage-0.9% and sugar yield-25.6% Disease resistance to leafspot and root rot is superior to local varieties by 0.4-1 scale and 10-20%, respectively.Comparing the Tianyan 301 with some foreign polyploid sugar beet varieties, it increased sugar 1.7-3.0%, disease resistance 12 scale and 10-20%. Due to mainly selection in tetraploid parent, directire breeding in early generation, multi-site tests and south-reproduction and north-selection, the superior character stabilized rapidly.Since 1982,the total planting areas has been increasing. In 1987, it was about 60000 ha and spreaded widely in Heilonjiar.g, west of Jiling, east of Inner Mongolian and Yang ching region of Xinjiang etc.