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分蘖角度是水稻株型构成的重要性状之一，在育种上具有极其重要的意义。利用分率角度差异显著的１对舢粳亲本，将其杂交Ｆ１代花培加倍，构建了１个ＤＨ群体，考察了１１５个ＤＨ株系的分蘖角度，并使用该群体构建的分子图谱进行数量性状座位（ＱＴＬｓ）分析。分别在第９和１２染色体上检测３个ＱＴ Ｌｓ （ｑＴＡ－ ９ａ、ｑＴＡ－ ９ｂ和ｑＴＡ－ ２），贡献率分别为２２．７％、１１．９％和２０．９％，其加性效应均为负，表明由分蘖角度较大的窄叶青８号的基因控制，并讨论了这种由主效和微效基因控制的分蘖性状在育种学上的应用。
Tiller angle is one of the important traits of rice plant type composition and has extremely important significance in breeding. Using a pair of japonica parents with significant difference in fractional angle, their F1 hybrids were doubled in flower culture to construct a DH population. The tillering angle of 115 DH lines was investigated and the molecular structure of the population was constructed. Trait loci (QTLs) analysis. Three QT Ls (qTA-9a, qTA-9b and qTA-2) were detected on chromosomes 9 and 12, respectively, and their contribution rate was 22.7%, 11.9% and 20.9% Were all negative, indicating that the gene was controlled by Narrow Yeqing 8 with a large tillering angle. The application of this tillering trait controlled by major and minor genes in breeding was also discussed.