【摘要】 利用 30 0 Gy6 0 Co-γ射线辐照早籼稻品系 W8- 1干种子 ,诱发产生了低淀粉粘滞性突变体 lsv- 1。对其淀粉特性分析表明 ,突变体的表观直链淀粉含量、胶稠度和碱消值与原亲本相仿 ,但最高粘度、冷胶粘度、崩解值和消减值明显小于原亲本 ,达最高粘度时间更短 ,开始糊化温度更高。突变体糊化后的米粉特性和胚乳内淀粉粒的形态与原亲本显著不同更多还原

【Abstract】 A low starch viscosity mutant of rice (Oryza sativa L.), named as lsv 1, was induced from an early indica rice W8 1 with 300 Gy gamma rays irradiation. Starch quality of the mutant was comparatively characterized along with the original parent W8 1. Apparent amylose content, gel consistency, and alkali spreading value of the mutant lsv 1 were similar to the original parent W8 1. However, the major parameters of starch viscosity in the mutant lsv 1 starch, i.e. peak paste viscosity, cool paste viscosity, breakdown viscosity, and setback viscosity were significantly lower than those of W8 1. It also had a shorter peak time and higher paste temperature, compared to the original parent. The feature of the pasted rice flour and morphology of starch granules in the endosperm of mutant lsv 1 were different from the original parent.更多还原