中国农业科学2011，Vol.44Issue(12)：2439-2445,7.DOI:10.3864/j.issn.0578-1752.2011.12.004
灌浆期表观直链淀粉含量相似品种稻米胶稠度和RVA谱的动态差异
Dynamic Differences of the RVA Profile and Gel Consistency in Two Rice Varieties with Similar Apparent Amylose Content During Grain Filling
摘要
Abstract
[Objective] This study was performed to investigate the reason of the difference in the two rice varieties with similar apparent amylose content (AAC) by analyzing the dynamic formation of rice quality. [Method] Two rice cultivars Wuyujingi and 30you917 with similar apparent amylose content were used as materials. The dynamic changes of gel consistency and RVA profile of the developing grains during the quality formation were studied. [ Result ] The differences were obviously found in the dynamic changes of amylose content, gel consistency and RVA profile of the developing grains. The difference in dynamic change of amylose content in two varieties from 5d to 15d after anthesis was significant, while the contents of amylose were nearly equal at late grain-filling stage. Gel consistency and RVA profile between the two varieties varied in the grain-filling period. The gel consistence of Wuyujingi was softer than that of 30you917 at 5-10 d after anthesis, while harder than that of 30you917 at 20-40 d after anthesis. During the determination of RVA profile, Wuyujingi represented higher stickiness such as big breakdown, smallpositive setback and low pasting temperature compared to 30you917. [ Conclusion ] These results suggested that the differences in the dynamic formation of the main quality indices during grain filling were the representation of the diversities of rices with similar apparent amylose content. It was Wuyujing3 that provided with higher peak viscosity, breakdown and lower positive setback during the formation of rice kernel and had high cooking and eating qualities.关键词
水稻/胶稠度/RVA谱/动态变化/米质形成Key words
rice/gel consistency/RVA profile/dynamic changes/formation of rice quality引用本文复制引用
蔡一霞,刘春香,王维,张洪熙,张祖建,杨静,唐汉忠..灌浆期表观直链淀粉含量相似品种稻米胶稠度和RVA谱的动态差异[J].中国农业科学,2011,44(12):2439-2445,7.基金项目
国家自然科学基金项目(30700484)、广东省自然科学基金博士启动项目(5300357) （30700484）
