不同木薯品种(系)在不同生长期淀粉特性的分析

Starch Properties of Different Cassavas at Different Growth Period

为了了解不同木薯品种（系）在不同生长期中的淀粉特性,系统分析了E169、E355、E1424、E1395、E234、E632、E333及E232八种木薯品系在6~11个月生长期含粉率、淀粉颗粒大小、支链淀粉含量、透明度、冷冻稳定性、凝沉稳定性、粘度、糊化温度等淀粉特性等,并分析这些特性之间的相关性。所分析8种木薯品种（系）含粉率有一定差异,且随生长时间的延长呈先增加后下降的趋势;淀粉颗粒粒径小,不同品种差异小,平均为7.0~11.5μm,集中分布在10.0~11.0μm,随生长时间的延长先增后减;支链淀粉含量因品种（系）不同有较大差异,且随着生长期的不同变化趋势不完全一样;淀粉糊化温度差异不大,糊化粘度较低,透明度低,不同品种和同一品种在不同生长时间差异不明显;冻融稳定性和凝沉稳定性低,不同品种和同一品种（系）在不同生长时间差异明显;淀粉特性之间相关性不完全一样。为木薯品种培育,企业原料质量把控及根据原料品种生产适用于不同领域淀粉提供理论指导。

To investigate the starch properties of different cassava varieties under different growth period, the starch properties, including starch content of fresh cassava, particle size, amylase content and amylopectin content, transparency, freezing stability, retrogradation, viscosity and gelatinization point of cassava varieties E169, E355, EI424,E1395 ,E234, E632, E333 and E232 under 6 ~ 11 months growth period were analyzed, and the correlations between the starch properties were discussed. The resulted showed that the starch content of different cassavas varied, and firstly increased then decreased during growth. The mean starch particle size was 7.0- 11.5μm, and the size distribution was mainly 10.0 - 11. 0μ. The amylase content and amylopectin content of various cassavas were quite different, and varied during different growth periods; the viscosity and transparency were low, the gelatinization points of different cassavas is very close; The correlations between starch properties of different cassava was not same, It provides theory introduction for breeding new good cassava varieties, raw material quality controlling and producing different starch goods used in different fields depending on cassava starch properties for starch processing enterprises.