稻米的外观品质性状与稻米的品质、市场价值及水稻产量密切相关，研究稻米外观品质形成的分子基础对于培育优质高产水稻新品种具有重要意义。本研究以佳辐占作为优良稻米外观品质的供体，以珍佳B（佳辐占/珍汕97B//珍汕97B的回交重组自交系F11，即BC1F11）和珍汕97B为亲本杂交构建F2群体，应用SSR（simplesequencerepeats）标记，对控制稻米外观品质性状（粒长、粒宽、长宽比、粒厚和垩白粒率）的基因进行QTL定位分析，并估算其效应值，并构建用于第5号染色体控制垩白粒率和粒宽主效基因精细定位的高世代回交群体。主要研究结果如下： （1）成熟期稻米胚乳细胞组织结构的电镜观察结果表明...Grain appearance quality is closely associated with rice quality, market value and rice yield. Combined with traditional breeding methods, studing the locuses of the appearance quality traits in rice is important to breed high-yield and high-quality rice varieties. In this study, “Jiafuzhan” was a good donor for high appearance quality. We selected ZJB and ZS97B as the parents to establish F2 popu...学位：理学硕士院系专业：生命科学学院生物学系_遗传学学号：2172008115256
