Correlation analysis of rice grain quality characteristics

Abstract

Based on the classification of indica hybrid rice, indica con ventional rice, japonica hybrid rice, japonica conventional rice, the correlation analysis and multiple comparisons of grain quality characters were carried out using large samples. Results were as follows： (1) in milling quality, different rice types all had a significant positive correlation between brown rice rate, milled rice rate and head rice rate; (2) in appearance quality, the length/width ration of different rice types was significantly and negatively correlated to milled rice rate, head rice rate, chalkiness grain rate, chalkiness degree respectively; (3) in eating quality, the amylose con tent of indica rice was significantly and positively correlated to Alkali Spreading Value, negatively correlated to gel consistency, and there were no significant correlation between amylose content, Alkali Spreading Value, and gel consistency in japonica rice. In multiple comparison, all kinds of rice were divided into 3 groups (high, middle and low) according to the values of head rice rate, chalkiness and amylose content, which were significantly different respectively, and the rest corresponding rice quality properties of the 3 groups were compared.