Detection and Correlation Analysis of Dry Matter, Starch and Reducing Sugar Content in Potato Tubers
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Abstract:
In this study, dry matter, reducing sugars and starch content of forty-six potato varieties from 13 provinces (14 regions), were detected according to GB methods. The significances of reducing sugar and starch content amongst different samples were analyzed by SPSS 20.0, and the correlation amongst dry matter, reducing sugar and starch content were studied by scatterplot matrix and simple line regression plot. The results showed that the content of dry matter in potato was 15.43%~29.67%, the content of reducing sugar was 0.09%~1.84% and the content of starch was 9.11%~22.30% (all wet basis). The content of reducing sugars amongst most of different potato varieties was significant difference (p<0.05), and similar result was found in starch content. While there was no correlation between reducing sugar content and dry matter, or between reducing sugars content and starch content, according to the scatterplot matrix analysis. Potato dry matter content and starch content were positively correlated with the linear equation: y=9.626+0.708x, which means that the higher the dry matter content in the potato, the higher the starch content.
