甜菜抗丛根病新品种内甜抗202的选育

内甜抗202（原名内101）是多胚型二倍体抗丛根病杂交种。父母本按1：3比例自然杂交而成。该品种在内蒙古自治区甜菜品种抗病区域试验中。平均块根产量40954．5kg／hm^2．比对照品种甜研303提高81．07％；含糖率16.38％。比对照品种提高2．05度；产糖量6729kg／hm^2，比对照品种提高109．4％，丛根病病情指数0．13，比对照品种降低0．22。在内蒙古自治区甜菜品种普通组生产试验中．块根产量和产糖量分别比对照提高48．71％和47．81％。含糖率比对照降低0．10度；该品种达到丰产型品种标准。在内蒙古自治区甜菜品种抗病组生产试验中，块根产量、含糖率、产糖量分刺比对照提高156％、1．39度、181．25％，丛根病病情指数比对照降低0.48．达到丰产、抗丛根病型品种标准。

Breeding of New Sugarbeet Variety with Rhizomanla Resistance-NeiTianKang 202

Neitiankang 202 is a muhigerm diploid sugarbeet hybrid variety. Female parent and male parent was crossed through natural pollination by 3：1.In inner mongolia sugarbeet variety test from 2002 to 2003.the mean root yield was 40954.50kg/hm^2,increased by 81.07% in comparison with control variety;the mean sugar content was 16.38%,increased by 2.05°S;the mean sugar yield was 6729.00kg/hm^2,increased by 109.40%;the rhizomania rate was 0.13 grade,lowered by 0.22.1n inner mongolia sugarbeet variety demonstration test ofcommon group,the mean root yield and sugar yield increased by 48.71% and 47.81%,the mean sugar content lowered by 0.1°S.the variety has shown the high yield.In inner mongolia sugarbeet variety demonstration test of resistance group, the mean root yield, sugar content and sugar yield increased by 156% ,1.39°S and 181.25%.the rhizomania rate lowered by 0.48.the variety has shown a high yield and resistance to rhizomania and leafspot.