Unconditional and conditional analysis of epistasis between tillering QTLs based on single segment substitution lines in rice

文献类型： 外文期刊

第一作者： Zhou, Huaqian

作者： Zhou, Huaqian;Yang, Weifeng;Ma, Shuaipeng;Luan, Xin;Zhu, Haitao;Wang, Shaokui;Zhang, Guiquan;Liu, Guifu;Meng, Lijun;Wang, Aimin;Huang, Congling;Rong, Biao;Dong, Shangzhi;Liu, Guifu;Ma, Shuaipeng

作者机构：

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Epistasis plays an important role in manipulating rice tiller number, but epistatic mechanism still remains a challenge. Here we showed the process of epistatic analysis between tillering QTLs. A half diallel mating scheme was conducted based on 6 single segment substitution lines and 9 dual segment pyramiding lines to allow the analysis of 4 epistatic components. Additive-additive, additive-dominance, dominance-additive, and dominance-dominance epistatic effects were estimated at 9 stages of development via unconditional QTL analysis simultaneously. Unconditional QTL effect (QTL cumulative effect before a certain stage) was then divided into several conditional QTL components (QTL net effect in a certain time interval). The results indicated that epistatic interaction was prevalent, all QTL pairs harboring epistasis and one QTL always interacting with other QTLs in various component ways. Epistatic effects were dynamic, occurring mostly within 14d and 21-35d after transplant and exhibited mainly negative effects. The genetic and developmental mechanism on several tillering QTLs was further realized and perhaps was useful for molecular pyramiding breeding and heterosis utilization for improving plant architecture.

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