淀粉专用型甘薯品质形成规律及其与主要农艺性状的相关性  

Formation laws of quality characters in starch sweetpotato cultivars and its correlation with main agronomic characters

作　　者：周志林[1,2] 唐君 曹清河[1] 赵冬兰[1] 张安[1] ZHOU Zhi-lin;TANG Jun;CAO Qing-he;ZHAO Dong-lan;ZHANG An(Jiangsu Xuzhou Sweetpotato Research Center,Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province,Key Laboratory of Biology and Genetic Improvement of Sweetpotato,Ministry of Agriculture,Xuzhou 221131,China;School of Life Sciences,Jiangsu Normal University,Xuzhou 221116,China)

机构地区：[1]江苏徐州甘薯研究中心,江苏徐淮地区徐州农业科学研究所,农业部甘薯生物学与遗传改良重点实验室,江苏徐州221131 [2]江苏师范大学生命科学学院,江苏徐州221116

出　　处：《江苏农业学报》2020年第2期277-283,共7页Jiangsu Journal of Agricultural Sciences

基　　金：国家重点研发计划项目(2018YFD1000705);现代农业产业技术体系专项资金项目(CARS-10-B1-2019);农业部物种资源保护项目(19190157);天山创新团队计划项目(201705273)。

摘　　要：以4个中、高淀粉含量甘薯品种为试验材料,于2013、2014年连续2年对其产量、品质进行调查及统计分析,研究不同发育阶段淀粉积累规律及其与主要农艺性状的相关性。结果表明:块根迅速膨大期,干物质及淀粉积累总体呈上升趋势,基本在110 d时达到最大值。相关性分析结果显示,甘薯块根淀粉积累与甘薯块根干物率、薯干粗淀粉含量呈极显著正相关关系(r分别为0.97和0.91,P<0.01),与甘薯块根鲜产量、薯干产量、结薯数呈显著正相关关系(r分别为0.61、0.75、0.71,P<0.05),与薯干粗蛋白含量、茎蔓鲜质量、薯干还原糖含量呈显著负相关关系(r分别为-0.83、-0.72、-0.06,P<0.05),与分枝数、薯干可溶性糖含量相关性不大。通过主成分分析提取出2个主成分,累计方差贡献率达94.62%,其中贡献最大的是薯干粗淀粉含量和甘薯块根干物率,基本反映了甘薯淀粉合成相关经济及品质性状的全部信息。In this study,four sweet potato varieties with medium and high starch content were used as test materials.In 2013 and 2014,the yield and quality of sweet potato were investigated and statistically analyzed to study the starch accumulation law and its correlation with major agronomic traits at different development stages.The results showed that the accumulation of dry matter and starch in sweetpotato storage roots during rapid expanding period was on the rise,and reached the maximum at 110 d.The results of correlation analysis showed that the accumulation of starch in sweetpotato storage roots was very significantly correlated with dry matter content in storage roots and crude starch content in dry storage roots(r=0.97 and r=0.91,respectively,P<0.01),significantly correlated with sweetpotato fresh yield,dry yield and the number of storage roots(r=0.61,r=0.75,r=0.71,respectively,P<0.05),and significantly negatively correlated with stem fresh weight,crude protein content and reducing sugar content in dry storage roots(r=-0.72,r=-0.83,r=-0.06,respectively,P<0.05).It had little correlation with branch number and soluble sugar content in dry storage roots.Two principal components were extracted by principal component analysis,and the cumulative variance contribution rate reached 94.62%.The crude starch content in dry sweetpotato storage roots and dry matter content had great contribution to starch accumulation,which basically reftected all the information about economic and quality characters related to the synthesis of starch.

关 键 词：甘薯 淀粉 品质 农艺性状 

分 类 号：S531.024[农业科学—作物学]