摘要
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 important characters that constitute plat type with great significance in breading. Apair of japonica/indica lines, which were significantly different in tiller angle, were used in this study. A DH population were constructed via anther culture of FI hybrids. The tiller angles of 115 DH lines were measured. QTL analysis was conducted based on the constructed molecular linkage map. Three QTLs (qTA-9a, qTA-9b and qTA-12) were detected on chromosome 9 and 12 respectively, Their variation were 22.7%, 11.9% and 20.9% respectively and their additive effects were all negative, showing this character was controlled by genes from big tiller angle Parent ZYQ8. The application of the tiller angle that was controlled by major genes and minor genes in rice breeding is also discussed.
基金
国家自然科学基金(批准号:39970471)
浙江省自然科学基金(批准号:398217)
