用 Asominori/IR2 4重组自交系 (RIL )为材料 ,对控制稻米直链淀粉含量和籼粳分化度的 QTL进行了分析。检测到了 5个控制直链淀粉含量的 QTL(Am1～ Am5) ;分别位于第 1,7,8,9,12染色体上 ;贡献率分别为 16 .6 % ,13.2 % ,17.1% ,13.2 % ,14.6 % ;Am1,Am3,Am5的遗传正效应等位基因来源于 IR2 4 ,Am2 ,Am4的遗传正效应等位基因来源于 Asominori。同时检测到了 5个控制籼粳分化度的 QTL(Ij1～ Ij5) ,分别位于第 1,2 ,11染色体上 ;贡献率分别为 2 1.9% ,2 1.4 % ,13.4 % ,2 5.0 % ,14.5% ;其遗传正效应等位基因来源于 Asominori。另外通过稻米直链淀粉含量与籼粳分化度相互关系分析发现两者之间没有密切联系 The QTL controlling the amylose content and the indica-japonica differentiation of rice was analyzed with Asominori / IR2 4 recombinant inbred line (RIL). Five QTLs controlling amylose content (Am1 ~ Am5) were detected on chromosomes 1, 7, 8, 9 and 12. The contribution rates were 16.6%, 13.2%, 17.1% and 13.2% 14.6%. The gene positive effect alleles of Am1, Am3 and Am5 were derived from Asominori because of the positive allele of IR2 4, Am2 and Am4. Five QTLs (Ij1 ~ Ij5) controlling the differentiation of indica and japonica were detected at chromosomes 1, 2 and 11, respectively. The contribution rates were 2 1.9%, 2 1.4%, 13.4%, 2 5.0% and 14.5% ; Its genetic positive effect allele is derived from Asominori. In addition, the correlation between amylose content and indica-japonica differentiation of rice showed that there was no close relationship between the two