不同水稻品种(系)稻米品质性状分析

为了探讨不同水稻品种(系)稻米品质差异,改良稻米品质,以吉林省近年育成的水稻品种(系)为试验材料,进行了品种类型间的比较研究。结果表明,糙米率与精米率呈极显著正相关(r=0.968**);长宽比与整精米率、粒长呈显著正相关(r=0.643*、r=0.699*);垩白粒率与垩白度呈极显著正相关(r=0.869**)。垩白率、垩白度、整精米率、直链淀粉及胶稠度为影响稻米品质的主要因子,其对稻米品质的累积贡献率为86.977%,应重视垩白粒率、垩白度和碾磨品质的关系,以达到有效地改善稻米品质的目的。

Character Analysis on Grain Quality of Different Varieties of Japonica Rice

In order to discuss the difference of grain quality of different varieties of Japonica rice and improve the grain quality,the study conducted a comparative studies among varieties bred in recent years.The results showed that the positive correlation was founded between brown rice rate and polished rice rate(r=0.968*),between length-width ratio and milled rice rate(r=0.643*),between length-width ratio and length(r=0.699*),also between chalky kernel percentage and chalkiness(r=0.869**).The chalky kernel percentage,chalkiness,milled rice rate,amylose and gel consistency were principal factors inflecting grain quality of rice,and their total accumulative contribution rate was 86.977%.In conclusion,the principal factors inflecting grain quality of rice were chalkiness,milled rice rate,amylose and gel consistency.The correlation between chalky kernel percentage,chalkiness and milled rice quality should be paid attention to for improving grain quality.