Analysis on Variation and Difference for Rice Quality Traits among Different Types of Rice
ZHU Zhi wei, CHEN Neng, WANG Dan ying, ZHANG Xiu fu, YAO Qing, MIN Jie, LIAO Xi yuan * (China National Rice Research Institute, Hangzhou 310006, China;
Based on total 8 390 rice samples of indica conventional rice, indica hybrid rice, japonica conventional rice, japonica hybrid rice, the differences of the quality traits among different rice types were analyzed. The main results were as follows: (1) Variation coefficients of quality traits in conventional rice varieties were slightly higher than those of hybrid rice. Variation coefficients of grain chalkiness, translucency and chalkiness were high, but those of brown rice rate, milled rice rate and head rice rate were low. (2)Quality of japonica rice was higher than that of indica. Chalkiness, head rice rate and amylose content should be emphasized in indica rice quality improvement. Reducing chalky grain and increasing head rice rate were important in japonica rice quality improvement. (3) The quality of indica hybrid rice was improved significantly. Except chalkiness, frequency of the other quality characteristics meeting the high quality standards was high. (4) In indica conventional rice, the frequency of chalkiness and amylose content appeared two apex distribution, both high quality and low quality indica conventional rice rate were high.
【CateGory Index】： S511