甜菜多倍体新品种甜研309的选育

Breeding of New Sugarbeet Polyploid Variety Tianyan 309

甜研３０９是由四倍体甜４２７与二倍体甜２１１杂交而成的普通多倍体品种。该品种具有抗病性较强、含糖较高、丰产性稳定、适应性广等优点。区试中，平均根产量３０５６２ｋｇ／ｈｍ２，分别比统一对照甜研３０２、当地对照增产５．０１％、１１．１２％；平均含糖率１５．１８％，分别较上述对照提高０．１６度、０．６７度；产糖量４６６１ｋｇ／ｈｍ２，分别较上述对照提高５．８２％、１７．４７％。甜研３０９在“八五”国家甜菜育种攻关项目中的丛根病品系鉴定试验中，在内蒙、宁夏、甘肃、新疆等试验点表现出较强的耐丛根病性。

A new sugarbeet polyploid variety Tianyan 309 has developed with the crossing betweenTian 427（tetraploid）and Tian 211（diploid）, this variety has some merits which are highdisease resistance，high sugar content，high and stable yield，widely adaptability．The averageroot yield in the regional test was 30562 kg／hm2 which higher than the unified check Tianyan302 and local check 5．01％，11．12％resp．The average sugar content 15．18％and 0．16％and 0．67％increased，sugar yield 4661 kg／hm2，and 5．82％，17．47％increased．In identifyingtests of“8．5”National Sugar Beet Breeding Project this variety tolerant to Rhizomania inInner Mengolia，Ningxia，Gansu，Xinjiang etc.