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《Chinese Journal of Rice Science》 2003-01
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Development of a Low-Starch Viscosity Rice Mutant and Its Characteristics Analysis

WU Dian xing *, ZHAO Hong, SHEN Wei qiao, HAN Juan ying, XIA Ying wu(Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China; *Corresponding author, E mail:dianxingwu@hotmail.com)  
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.
【Fund】: 国际原子能机构技术合作项目(CPR/ 0 5/ 0 1 3);; 浙江省重大项目941 0计划资助项目
【CateGory Index】: S511
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