食用型甘薯品质性状变化及其与农艺性状相关性  

Variation of quality traits of storage root and their relationships with major agronomic traits in edible sweet potato

作　　者：后猛[1] 张允刚[1] 王欣[1] 唐维[1] 刘亚菊[1] 唐忠厚[1] 马代夫[1] 李强[1] 

机构地区：[1]江苏徐州甘薯研究中心,中国农业科学院甘薯研究所,农业部甘薯生物学与遗传育种重点实验室,江苏徐州221131

出　　处：《江苏农业学报》2014年第1期31-36,共6页Jiangsu Journal of Agricultural Sciences

基　　金：江苏省农业科技自主创新基金项目[CX(11)1027];江苏省科技支撑计划项目(BE2011301);现代农业产业技术体系建设专项基金项目(CARS-11);国家高技术研究发展计划("863"计划)(2012AA101204)

摘　　要：为了探究不同生长发育阶段甘薯块根品质性状变化及其与主要农艺性状的关系,测定了3种食用型甘薯品种的结薯数,块根干率,茎、叶、柄、块根鲜质量,总胡萝卜素、淀粉、还原糖、可溶性糖和粗蛋白含量.结果显示,食用型甘薯的淀粉含量于栽插后50 ～ 92 d出现“升高-下降-升高”的变化趋势,之后随块根膨大而小幅波动,总体上稍有增加；在栽后50～92 d,块根中可溶性糖和还原糖含量的变化规律相似,均与淀粉含量的变化动态相反；淀粉含量与块根干率的变化动态总体上一致；粗蛋白含量的变化趋势与可溶性糖含量基本一致；而总胡萝卜素含量在不同食用型甘薯品种间差异较大,表现为苏薯8号＞徐薯23＞栗子香.食用型甘薯的淀粉含量与块根鲜质量和干质量呈显著或极显著正相关,可溶性糖干质量日增长量与块根鲜质量日增长量极显著正相关.食用型甘薯块根中可溶性糖的积累与块根的膨大具有一致性.China is the largest sweet potato planting country and producer in the world. Sweet potato contains manynutritional elements which are useful for human health. The breeding of edible sweet potato with high quality and yield hasbecome a major research goal for sweet potato breeders. The changes of quality traits of storage root during development andtheir relationships with major yield traits in three edible sweet potatoes [Ipomoea Batatas （L. ） Lam] were studied. Thestarch content of edible sweet potato varieties showed an uptrend of “rise-fall rise”50-92 d after planting, slightly fluctua-ted afterwards, and increased as a whole. The soluble sugar and reducing sugar contents were similar, both contrary to thestarch content 50-92 d after planting. The dynamics ofstarch content and dry matter content was similar ingeneral. The crude protein content appeared similar trendto soluble sugar content, while total carotene content var-ied among three sweet potato varieties, following the orderof Sushu 8〉 Xushu 23〉 Lizixiang. The starch content waspositively correlated with fresh and dry weights of storageroot. Daily growth rates of soluble sugar dry weight waspositively correlated with fresh weight of storage root. And accumulation of soluble sugar was synchronized with the expansion of edible sweet potato storage root.

关 键 词：食用型甘薯 品质性状 农艺性状 相关性 

分 类 号：S531.01[农业科学—作物学]