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Genetic Relationships Among Panicle Characteristics of Rice (Oryza sativa L.) Using Unconditional and Conditional QTL Analyses

文献类型： 外文期刊

作者： Ye, Zihong 1 ; Wang, Junmin 2 ; Liu, Qian 1 ; Zhang, Minzhou 1 ; Zou, Keqin 1 ; Fu, Xianshu 1 ;

作者机构： 1.China Jiliang Univ, Dept Biotechnol, Coll Life Sci, Hangzhou 310018, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, Crop & Nucl Tech Inst, Hangzhou 310021, Zhejiang, Peoples R China

关键词： phenotypic variation;genetic relationship

期刊名称：JOURNAL OF PLANT BIOLOGY （ 影响因子：2.434； 五年影响因子：2.455 ）

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收录情况： SCI

摘要： Using mixed-model-based composite interval mapping and conditional statistical methods, we studied quantitative trait loci (QTLs) with epistatic effects and QTLs by environment interaction effects for rice seed set percent (SSP), filled grain number per plant (FGP), and panicle length (PL). A population of 241 recombinant inbred lines was used which was derived from a cross between "Zhenshan 97" and "Minghui 63." Its linkage map included 221 molecular markers. Our QTL analysis detected 28, 25, and 32 QTLs for SSP, FGP, and PL, respectively. Each QTL explained 1.37%similar to 13.19% of the mean phenotypic variation. A comparison of conventional and conditional mapping provided information about the genetic control system involved in the synthetic process of SSP, FGP, and PL at the level of individual QTLs. Conditional QTLs with reduced (or increased) effects were identified for SSP, which were significantly influenced by FGP or PL. Some QTLs could express independently for the given traits, thereby providing possibilities for simultaneous improvement of SSR and PL, and SSR and FGP. Epistasis was more sensitive to environmental conditions than were additive effects.

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