Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
Shool of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong Special Administrative Region.
Int J Biol Macromol. 2019 Jul 15;133:337-345. doi: 10.1016/j.ijbiomac.2019.04.022. Epub 2019 Apr 16.
In this study, 34 Chinese foxtail millet germplasm accessions (cultivars and breeding lines) were characterized for starch physicochemical properties including apparent amylose content, and gel textural, RVA pasting, thermal and retrogradation properties. The relationships among 21 starch parameters were discussed based on correlation analysis and hierarchical cluster analysis. Generally, this set of germplasm presented a surprisingly low genetic diversity in starch properties. The apparent amylose content ranged from 18.3% to 25.3% with a CV value of 5.0%, and gelatinization temperature ranged from 72.1 to 73.8 °C with a CV value of 0.5%. AAC was negatively correlated only with ΔH (p < 0.01) while GT only had a strong relationship with T and T of thermal properties (p < 0.001). The 21 measured starch parameters could be separated into three groups based on cluster analysis. This work should provide useful information for breeding improved quality foxtail millet.
本研究对 34 份中国谷子种质资源（品种和品系）的淀粉理化特性进行了分析，包括直链淀粉含量、凝胶质构、RVA 糊化特性、热特性和回生特性。基于相关分析和层次聚类分析，探讨了 21 个淀粉参数之间的关系。总体而言，这组种质资源在淀粉特性方面表现出惊人的低遗传多样性。直链淀粉含量范围为 18.3%至 25.3%，变异系数为 5.0%，胶凝温度范围为 72.1 至 73.8°C，变异系数为 0.5%。AAC 仅与 ΔH 呈负相关（p<0.01），而 GT 仅与热特性的 T 和 T 具有很强的相关性（p<0.001）。根据聚类分析，21 个测量的淀粉参数可分为三组。这项工作应该为培育改良品质的谷子提供有用的信息。
