Conditional QTL Mapping of Sedimentation Volume on Seven Quality Traits in Common Wheat  

作　　者：DENG Zhi-ying ZHAO Liang LIU Bin ZHANG Kun-pu CHEN Jian-sheng QU Hou-lan SUN Cai-ling ZHANG Yong-xiang TIAN Ji-chun 

机构地区：[1]State Key Laboratory of Crop Biology,Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province,Department of Agronomy/Group of Wheat Quality Breeding,Shandong Agricultural University [2]Agricultural Technology Popularization Station [3]State Key Laboratory of Plant Cell and Chromosome Engineering,Ministry of Science and Technology/Institute of Genetics and Developmental Biology,Chinese Academy of Sciences [4]Central Agricultural Technology Station

出　　处：《Journal of Integrative Agriculture》2013年第12期2125-2133,共9页农业科学学报（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province,China(ZR2009DQ009);the National Natural Science Foundation of China(30971764 and 31171554);the National Major Projects of Cultivated Transgenic New Varieties Foundation of China(2011ZX08002-003 and 2009ZX08002-017B)

摘　　要：To evaluate the possible genetic interrelationships between flour components and the sedimentation volume（SD）,a doubled haploid（DH） population comprising 168 lines were used to identify the conditional quantitative trait loci（QTLs） for SD in three environments.Ten additive QTLs and 15 pairs of epistatic QTLs were detected for SD through unconditional and conditional QTL mapping.Three major additive QTLs were detected for SD conditioned on the seven quality traits.Two additive QTLs were found to be independent of these traits.Three additive QTLs were suppressed by three of the seven traits because of non-detection in unconditional mapping.Three pairs of epistatic QTLs were completely affected by the seven traits because of detection in unconditional mapping but no-detection in conditional mapping.Twelve pairs of epistatic QTLs were detected in conditional mapping.Our results indicated that conditional mapping could contribute to a better understanding of the interdependence of different and closely correlated traits at the QTL molecular level,especially some minor QTLs were found.The conditional mapping approach provides new insights that will make it possible to avoid the disadvantages of different traits by breeding through molecular design.To evaluate the possible genetic interrelationships between flour components and the sedimentation volume（SD）,a doubled haploid（DH） population comprising 168 lines were used to identify the conditional quantitative trait loci（QTLs） for SD in three environments.Ten additive QTLs and 15 pairs of epistatic QTLs were detected for SD through unconditional and conditional QTL mapping.Three major additive QTLs were detected for SD conditioned on the seven quality traits.Two additive QTLs were found to be independent of these traits.Three additive QTLs were suppressed by three of the seven traits because of non-detection in unconditional mapping.Three pairs of epistatic QTLs were completely affected by the seven traits because of detection in unconditional mapping but no-detection in conditional mapping.Twelve pairs of epistatic QTLs were detected in conditional mapping.Our results indicated that conditional mapping could contribute to a better understanding of the interdependence of different and closely correlated traits at the QTL molecular level,especially some minor QTLs were found.The conditional mapping approach provides new insights that will make it possible to avoid the disadvantages of different traits by breeding through molecular design.

关 键 词：wheat（Triticum aestivum L.） sedimentation volume conditional QTL mapping 

分 类 号：S512.1[农业科学—作物学]