抗病高淀粉甘薯品种徐薯26的选育及产量形成特点

Breeding and Yield Formation of a New Sweetpotato Cultivar Xushu 26 with High Starch Content and Disease Resistance

抗病高淀粉甘薯新品种徐薯26是中国农业科学院甘薯研究所以徐781为母本,通过集团杂交放任授粉、多年多点综合鉴定选育而成。该品种2009年通过国家甘薯新品种鉴定,鉴定编号为国品鉴甘薯2009003。对徐薯26的形态特征、品质性状、抗病性、生产力和产量形成的生理特点等进行了研究,结果表明:徐薯26全生育期长势平稳,薯干品质和食味较好,抗根腐病和蔓割病,薯干和淀粉产量与徐薯18相比增产极显著,生长后期薯块干物质积累较快,经济系数较高,适宜早栽和密植。

Xushu 26 is a newly released sweetpotato cultivar with disease resistance and for starch processing,developed at Sweetpotato Research Institute,Chinese Academy of Agricultural Sciences.It is the progeny of a cross among Xushu 781 and multi-male by opening pollination.After evaluated in multi-places it was identified as National Varieties Appraisal Sweetpotato 2009003 by the National Sweetpotato New Varieties Appraisal Committee in 2009.Xushu 26 was studied on its morphological characteristics,quality characteristics,disease resistance,productivity and physiological characteristics of yield formation.It was steady during all growth period,had good quality of dry root and better taste for cooking,and was resistant to root rot and stem rot.The dry root yield and starch yield were most significantly increased than Xushu 18.The dry root was accumulated more rapidly at late growth period,and coefficient of economics was higher.It was suitable for planting earlier and more densely.