Detection of epistatic interaction of two QTLs, gw8.1 and gw9.1, underlying grain weight using nearly isogenic lines in rice
文献类型： 外文期刊
作者： Jin, Feng-Xue 1 ; Ji, Shi-Dong 1 ; Xie, Xiao-Bo 2 ; Kang, Ju-Won 1 ; Ju, Hong-Guang 3 ; Ahn, Sang-Nag 1 ;
作者机构： 1.Chungnam Natl Univ, Coll Agr & Life Sci, Dept Agron, Taejon 305764, South Korea
2.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou 310021, Zhejiang, Peoples R China
3.Yanbian Univ, Coll Agr, Dept Agr, Longjing 133400, Jilin, Peoples R China
关键词： RM23204: simple sequence repeat marker;RM23211: simple sequence repeat marker;grain yield;quantitative trait locus;epistatic interaction;grain weight;genetic mechanism;rice breeding;nearly isogenic rice line
期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）
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收录情况： SCI
摘要： Grain weight (GW) is one of the most important targets for grain yield in rice breeding. In previous studies, two quantitative trait loci (QTLs) for GW, gw8.1 and gw9.1, have been identified using progeny derived from a cross between the japonica cultivar Hwaseong and Oryza rufipogon (IRGC 105491). To test whether these quantitative trait loci (QTLs) have an epistatic interaction, we developed an F., population by crossing two nearly isogenic lines (NILs) harboring gw8.1 and gw9.1. Simple sequence repeat (SSR) markers tightly linked to the QTLs were used to select F-3 QTL-NILs from the F-2 population. A two-way ANOVA revealed an epistatic interaction between the two QTLs in the F-2 population (P = 0.0084). This interaction was confirmed by an analysis of F-3 QTL-NILs indicating that both QTLs are involved in the same genetic mechanism controlling GW. The gw8.1 QTL was further mapped between two SSR markers, RM23204 and RM23211, which are 110.1 kb apart. To our knowledge, this is the first report using QTL-NILs to reveal an epistatic interaction between QTLs for GW.
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