【摘要】 为了明确RVA谱特征值在评价稻米品质中的作用,本文选用不同穗型水稻为材料,按照穗部位置分为27个粒位,研究了不同粒位上淀粉RVA谱特征与其它品质性状的关系。结果表明碾米品质中的整精米率和粒长与峰值黏度、热浆黏度和崩解值3个特征值有极显著正相关关系。外观品质中的垩白率、垩白度和营养品质中的总蛋白质含量、清蛋白含量、醇溶蛋白含量、谷蛋白含量、脂肪酸含量都与峰值黏度、热浆黏度、崩解值呈极显著负相关,与消减值极显著正相关;球蛋白含量则表现相反规律。蒸煮食味品质中的食味值、直链淀粉含量和胶稠度与峰值黏度、热浆黏度、崩解值3个特征参数呈极显著正相关,与消减值呈极显著负相关,尤其是与峰值黏度和崩解值2个参数的相关系数较大。淀粉RVA谱特征值能密切反映稻米品质的好坏,穗下部二次枝梗籽粒的峰值黏度和崩解值的大小可以作为优质粳稻辅助选择的首选指标。更多还原

【Abstract】 In order to to derify application value of RVA profile characteristics in evaluating rice quality. Two different panicle type japonica rice cultivars,which were divided into 27 grain positions,were applied to study relationship between RVA profile characteristics and other quality traits in grain positions. The results showed that head rice percentage and grain length had extremely significantly positive correlation with peak viscosity,hot paste viscosity and breakdown. Chalky grain percentage,chalkiness degree,total protein content,albumin content,prolamin content,glutelin content,fatty acid content had extremely significantly negative correlation with peak viscosity,hot paste viscosity,breakdown,and had extremely significantly positive correlation with setback. Globulin content showed the opposite regularity. Taste quality,amylose content and gel consistence had extremely significantly positive correlation with peak viscosity,hot paste viscosity,breakdown,and had extremely significantly negative correlation with setback.In particular, two coefficient parameters with larger peak viscosity and breakdown were larger. RVA Profile Characteristics could closely reflect rice quality. Peak viscosity and breakdown of grains on a second branch at lower part could be used as assisted selection indicators of good japonica rice.更多还原