<p>Potato cultivars with superior nutritional profiles and optimal starch characteristics are important for food applications, as starch physicochemical properties greatly influence the processing behavior and end-product attributes. In this study, three types of cultivars including Dongnong 310, Russet Burbank and Atlantic differing in nutrition quality and starch properties were compared. Results showed that Dongnong 310 possessed higher lightness with greater hardness, higher contents of proximate composition (total protein, fat and starch) and mineral (P, K, Fe and Zn) as well as essential amino acid levels. Notable variations were observed among various physicochemical attributes, particularly in amylose/amylopectin composition, thermal behavior, crystallinity degree, and cell wall thickness. It was found that the amylopectin content, the values of onset temperature (T<sub>0</sub>), peak temperature (T<sub>p</sub>), conclusion temperature (T<sub>c</sub>), enthalpy of gelatinization (ΔH) and the relative crystallinity in Dongnong 310 are the highest among three cultivars, which are all 5-6% higher than Russet Burbank. Additionally, transmission electron microscope (TEM) observation showed that Dongnong 310 possessed significantly thinner cell walls compared to other cultivars. This study presents novel findings on Dongnong 310, a potato cultivar that uniquely combines enhanced nutritional value with promising starch properties in comparison with two globally recognized cultivars, suggesting that Dongnong 310 is a potentially valuable cultivar for further studying in food applications.</p>

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Nutritional Quality and Starch Physicochemical Properties of Tubers from Different Potato Cultivars: A Comparative Analysis

  • Zhao Yuci,
  • Jiang Hong,
  • Ying Shi,
  • Zeng Fankui,
  • Li Quanshuang,
  • Yu lei

摘要

Potato cultivars with superior nutritional profiles and optimal starch characteristics are important for food applications, as starch physicochemical properties greatly influence the processing behavior and end-product attributes. In this study, three types of cultivars including Dongnong 310, Russet Burbank and Atlantic differing in nutrition quality and starch properties were compared. Results showed that Dongnong 310 possessed higher lightness with greater hardness, higher contents of proximate composition (total protein, fat and starch) and mineral (P, K, Fe and Zn) as well as essential amino acid levels. Notable variations were observed among various physicochemical attributes, particularly in amylose/amylopectin composition, thermal behavior, crystallinity degree, and cell wall thickness. It was found that the amylopectin content, the values of onset temperature (T0), peak temperature (Tp), conclusion temperature (Tc), enthalpy of gelatinization (ΔH) and the relative crystallinity in Dongnong 310 are the highest among three cultivars, which are all 5-6% higher than Russet Burbank. Additionally, transmission electron microscope (TEM) observation showed that Dongnong 310 possessed significantly thinner cell walls compared to other cultivars. This study presents novel findings on Dongnong 310, a potato cultivar that uniquely combines enhanced nutritional value with promising starch properties in comparison with two globally recognized cultivars, suggesting that Dongnong 310 is a potentially valuable cultivar for further studying in food applications.