稻谷粒形与稻米主要品质性状的关系

以包括籼粳、新老不同的类型92个水稻品种为试材，研究了稻谷粒形性状与品质性状的关系。结果表明，谷粒长与谷粒宽和谷粒厚呈极显著负相关，千粒重与谷粒长、谷粒宽和谷粒厚均呈显著或极显著正相关，千粒重主要由谷粒宽和谷粒厚决定。糙米率、精米率和整精米率与谷粒长、谷粒长宽比和谷粒长厚比呈极显著负相关，与谷粒宽、谷

Correlations between Rice Grain Shapes and Main Qualitative Characteristics

Ninety two indica and japonica rice cultivars were used to investigate the correlations between grain shapes and qualitative characteristics. The results indicated that there were significant negative correlations between grain width (WD), grain length (GL) and grain thick (GT). Significant positive correlations were also found between grain weight and GL, GW, GT. It seemed that the grain weight was mainly controlled by GW and GT. The results also showed that brown rice percentage (BRP), milled rice percentage (MRP) and head rice percentage (HRP) were correlated with GW, GT and GW/GT positively, and correlated with GL, GW/WL and GL/GT negatively. This indicated that the milled rice quality could be improved by increasing GW and GT and decreasing GL. Significant positive correlations also existed between chalky rice percentage (CR) and grain weight, GW and GT, amylose content (AC) and GL, GL /GW and GL /GT. The relationships between grain quality and grain shapes as well as their genetic improvements were also discussed.