Selection of Quality Evaluation Indices for Tamarind
To study the quality evaluation indices of Tamarinds indicia Linn,89 samples of tamarind in Yunnan Province were collected,and 9 quality evaluation indices including fruit weight,fruit thickness,fruit width,the number of seed,the percentage of seed,the percentage of flesh,and fruit long,etc.were tested.Those data of tamarind quality evaluation were analyzed by correlation analysis,principal component analysis and systematic cluster analysis.The results of the correlation analysis showed that there were significantly positive relation between fruit weight and the fruit thickness,fruit width,the number of seed,fruit long and the percentage of flesh,there were significantly positive relation between the percentage of flesh and thickness-width ratio,and there were significantly negative relation between the percentage of flesh and the percentage of seed.Principal component analysis showed that the first four principal component variance accumulation According to their squared Euclidean distance and between-groups linkage of cluster contribution rate amounted to 90.51%,which reflected 90.51% of the quality analysis,the tested 9 indices were divided into 4 types,which were finally simplified to 4 representative quality evaluation indices-fruit weight,the percentage of flesh,the percentage of seed,and thickness-width ratio.