Modification of Endosperm Starch Property by Loss of Function of Starch Synthase in Dongjin rice

摘要

A method for modifying endosperm starch property is provided to obtain a rice with a small, round and loose-structured starch granule of endosperm, thereby separating an outer layer from the rice being easy and saving energy for a process through heat-treatment. To prepare a rice with decreased starch crystallinity of endosperm compared to a wild-type rice, decreased starch chain having a starch polymerization degree(DP) of 6-8, 16-20 and at least 30, increased starch chain having a DP of 9-15 and 22-29, and 1-5 deg.C decreased gelatinization initiation temperature, a function-lost mutant OsSSIIIa/Flo5-1 prepared by inserting T-DNA into a starch synthase gene OsSSIIIa of Dongjin rice is used.