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用二个籼型杂交组合的Ｆ_２群体，构建了二张分别具有８９和９３个标记位点的ＲＦＬＰ图谱。在此基础上，应用方差分析法和区间作图法对控制籼稻粒形性状的ＱＴＬｓ进行定位。在特三矮２号／ＣＢ１１２８群体中，定位了１４个ＱＴＬｓ，其中５个控制粒长，２个主效基因（分别位于第５、第７染色体）和２个微效基因控制粒宽，１个主效基因和４个微效基因控制粒厚。在外引２号／ＣＢ１１２８群体中，共定位了１３个ＱＴＬｓ，其中５个影响粒长，２个主效基因（分别位于第２、第５染色体）和３个微效基因控制粒宽，３个微效基因影响粒厚。此外，估算了每个ＱＴＬ的贡献率、加性效应和显性效应值，分析某些染色体区间的多效现象，比较分析二群体ＱＴＬｓ定位结果的异同。
Two RFLP maps with 89 and 93 marker sites were constructed with two F2 populations of indica hybrids. On the basis of this, the QTLs controlling the grain traits of indica rice were located using the method of analysis of variance and interval mapping. In Tejiangzai 2 / CB1128 population, 14 QTLs were mapped, of which 5 were controlling grain length, 2 major genes (located on chromosomes 5 and 7) and 2 minor genes controlling grain width and 1 A major gene and four micro-gene control grain thickness. A total of 13 QTLs were mapped in the population of Citing / CB1128, of which 5 affected grain length, 2 major genes (located on chromosomes 2 and 5), 3 control genes Mimicry effect grain thickness. In addition, the contribution rate, additive effect and dominance effect value of each QTL were estimated, the effect of multiple chromosome intervals was analyzed, and the similarities and differences of QTLs mapping results of two populations were compared.