摘要
本文通过测定21个草莓品种冻干果粉的品质性状,基于描述性统计、相关性分析、主成分分析和聚类分析对不同品种冻干草莓果粉品质进行评价。结果表明,测定的21项品质指标中,仅DPPH自由基清除率和b*值的变异系数小于6%,其余指标变异系数均较大;各指标间存在不同程度的相关性。对各品质指标进行主成分分析,前6个主成分的累积方差贡献率达81.895%,基本反映了原指标的信息,主成分综合得分较高的品种为凤凰、梦、假章姬和紫金香玉,再进一步根据聚类结果,最终将草莓果粉21项品质指标简化为吸湿性、果糖含量、a*值、可溶性蛋白含量、VC含量、果胶含量、产出率和L*值8项具有代表性的核心评价指标。本研究结果为草莓冻干果粉品质指标的确定提供了理论依据。
The quality traits of freeze-dried fruit powder of 21 strawberry cultivars were evaluated based on descriptive statistics,correlation analysis, principal component analysis and cluster analysis. The results indicated that only variation coefficients of DPPH radical inhibition rate and b ＊ value were less than 6% among the 21 qualily indexes anti the others were larger.Meanwhile, there were different degrees of correlation among the indicators.The principal component analysis method was used to concentrating representation of interrelated variables and the first six principal components together account for 81.895% of the total variability. Among 2l strawberry cultivars, the principal component comprehensive scores of ‘Fenghuang’ , ‘ Meng’ , ‘Jiazhangji’ and ‘Zijinxiangyu’ were higher. According to PCA and clustering results, eight core indexes including hygroscopicity, fructose content, a ＊ value, soluble protein content, VC content, pectin content, yield and L＊ value selected from six categories of principal components could replace the original 21 indicators to simplify the evaluation indexes of freeze-dried strawberry powder.The results of this study would provide a theoretical basis for evaluating the quality indexes of freeze-dried strawberry powder.
作者
丛嘉昕
宋江峰
李大婧
包怡红
刘春泉
杨秋明
肖亚冬
CONG Jia-xin;SONG Jiang-feng;LI Da-jing;BAO Yi-hong;LIU Chun- quan;YANG Qiu- ruing;XIAO Ya- dong(College of Forestry, Northeast Foresty University, Harbin 150036, China;Institute of Farm Product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)
出处
《食品工业科技》
CAS
CSCD
北大核心
2018年第11期28-34,38,共8页
Science and Technology of Food Industry
基金
江苏省重点研发计划(现代农业)项目(BE2016363)
农业部公益性行业(农业)科研专项项目(201503142-05)
关键词
冻干草莓果粉
品质
主成分分析
聚类分析
freeze-dried strawberry powder
quality
principal component analysis
cluster analysis
