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
作者： Zhou, Huaqian 1 ; Yang, Weifeng 1 ; Ma, Shuaipeng 1 ; Luan, Xin 1 ; Zhu, Haitao 1 ; Wang, Aimin 3 ; Huang, Congling 3 ; R 1 ;
作者机构： 1.South China Agr Univ, Guangdong Key Lab Plant Mol Breeding, Guangzhou 510642, Peoples R China
2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen 440307, Peoples R China
3.Zhuhai Modern Agr Dev Ctr, Zhuhai 519000, Peoples R China
4.Chinese Acad Trop Agr Sci, Guangzhou Expt Stn, Guangzhou 510642, Peoples R China
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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