Characterization of the Main Effects, Epistatic Effects and Their Environmental Interactions of QTL on the Genetic Basis of Plant Height and Heading Date in Rice

作     者：JIANGGong-hao XUCai-guo LIXiang-hua HEYu-qing 

作者机构：NationalKeyLaborataryofCropGeneticImprovementHuazhongAgriculturalUniversityWuhan430070P.R.China 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2005年第4卷第3期

页      面：161-168页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：We gratefully acknowledge Prof.Zhu Jun for kind pro-V1sion of software QTLMapper 1.0.The work was in part supported by the National High Tech R&D Pro-gram of China(863 Program) the National Natural Sci-ence Foundation of China and the National Program on Key Basic Research Project of China(973 Program) 

主　　题：Plant height Heading date Quantitative trait loci Epistasis Genotype by environment interaction Rice 

摘      要：Main-effect QTL, epistatic effects and their interactions with environment are important genetic components of quantitativetraits. In this study, we analyzed the QTL, epistatic effects and QTL by environment interactions (QE) underlying plantheight and heading date, using a doubled-haploid ( DH) population consisting of 190 lines from the cross between anindica parent Zhenshan 97 and a japonica parent Wuyujing 2, and tested in two-year replicated field trials. A geneticlinkage map with 179 SSR (simple sequence repeat) marker loci was constructed. A mixed linear model approach wasapplied to detect QTL, digenic interactions and QEs for the two traits. In total, 20 main-effect QTLs, 9 digenic interactionsinvolving 18 loci, and 5 QTL by environment interactions were found to be responsible for the two traits. No interactionswere detected between the digenic interaction and environment. The amounts of variations explained by QTLs of maineffect were 53.9% for plant height and 57.8% for heading date, larger than that explained by epistasis and QEs. However,the epistasis and QE interactions sometimes accounted for a significant part of phenotypic variation and should not bedisregarded.