不同甘薯品种（系）品质性状差异研究

doi:10.12190/j.issn.2096-1197.2021.06.03

Abstract

Abstract: 【Objective】The differences in quality traits among sweet potato varieties（lines）were investigated. Sweet potato varieties（lines）with high quality traits were selected for subsequent breeding and processing.【Methods】The freeze-drying rate,starch,soluble sugar and protein content,as well as other quality indexes of 16 sweet potato varieties（lines）were assessed. The main strach quality traits were compared. The taste of baked sweet potato was evaluated.【Results】ZH1042 had the highest freeze-drying rate and starch content. ZZ1-358 had the highest soluble sugar content and protein content. Zheshu 20 had the highest total amylase activity and α-amylase activity. QZ2-2 had the highest β-amylase activity. The purity of starch extracted from Quzi No.9,Jinshu 67,ZH1042 and Z329 was higher than the other varieties（lines）. The starch extracted from F2-93 and Z329 had high proportion of the small particles,while ZH1042 had high proportion of the large particles. Jinshu 67 had the highest viscosity and starch disintegration value. In the correlation analysis,the starch content in sweet potato was extremely significantly negatively correlated with soluble sugar content and protein content（P<0.01）. The highest viscosity was extremely significantly positively correlated with hot paste viscosity,disintegration value,and final viscosity（P<0.01）. The hot paste viscosity was extremely significantly positively correlated with final viscosity（P<0.01）. The disintegration value was extremely significantly negatively correlated with gelatinization temperature（P<0.01）. The starch content of 16 sweet potato varieties（lines）was divided into four categories：more than 74%,69%-73%,60%-68% and less than 60%,respectively,according to cluster analysis.【Conclusion】Among the 16 sweet potato varieties（lines）,Jinshu 67,ZZ1-358 and ZH1042 had excellent quality traits,and had a certain comprehensive utilization value.

Key words: Sweet potato, Quality traits, Starch, Correlation analysis, Cluster analysis

CLC Number:

S531

LUO Letan, ZHANG Hongyun, SHI Jiang, ZHAO Lin. Difference study on the quality traits of various sweet potato varieties（lines）[J].Journal of Northern Agriculture, 2021, 49(6): 22-34.

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Difference study on the quality traits of various sweet potato varieties（lines）

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