摘要
对具有较低和中等表观直链淀粉含量的浙辐 5 0 4和 IR6 4的杂交后代进行观察 ,发现胚乳外观存在 4种类型 :乳白色、云雾状、透明状及各外观混合体。与胚乳外观紧密关联 ,表观直链淀粉含量 (AAC)也相应有 4种含量水平 :明显低 AAC变异型、浙辐 5 0 4型、IR6 4型和介于双亲的中间型。 RVA谱分析表明 ,不同胚乳外观的淀粉粘滞特性差异明显。透明状外观尽管 AAC相仿 ,但个体间淀粉粘滞性分化明显 ,只有个别优良品系的 RVA谱与优质亲本 IR6 4相似。表明以胚乳外观标记和 RVA谱理化指标辅助选择可有效控制表观直链淀粉含量和淀粉粘滞性 ,是改良早籼稻米品质的一条有效途径。
Low appearance amylose content(AAC) variety Zhefu 504 was crossed with middle AAC variety IR64 to analyze the performance of AAC and endosperm appearance in the grains of their progeny. Four types of endosperm appearance i.e. milky white, mist, transparency, and mixture of them, were found, and they were corresponding closely to the four AAC levels, i.e. variants with obviously low AAC, Zhefu 504 type, IR64 type, and middle type between parents. The RVA analysis indicated that starch viscosity property of grains with various endosperm appearance were evidently different. Although having similar AAC, the individuals with transparent endosperm appearance were different obviously in starch viscosity property, only few superior lines had the similar RVA profile with good quality rice IR64. The results suggested that endosperm appearance and RVA profile could be used as physical/chemical marker-assisted selection in rice grain quality improvement to effectively manage AAC and starch viscosity property.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2002年第1期80-82,共3页
Chinese Journal of Rice Science
基金
浙江省 9410计划资助项目
浙江省自然科学基金资助项目 ( 3972 48)
国际原子能机构技术合作资助项目 (CPR/0 5 /0 13)
