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Position: Home > Articles > Conditional QTL Mapping of Sedimentation Volume on Seven Quality Traits in Common Wheat Journal of Integrative Agriculture 2013,12 (12)

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

单位：

Shandong Agr Univ, Grp Wheat Qual Breeding, Dept Agron,Key Lab Crop Biol Shandong Prov, State Key Lab Crop Biol,Minist Sci & Technol, Tai An 271018, Shandong, Peoples R China;Agr Technol Popularizat Stn, Jining 272000, Peoples R China;Chinese Acad Sci, Inst Genet & Dev Biol, Minist Sci & Technol, State Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China;Cent Agr Technol Stn, Jining 272000, Peoples R China

关键词：

wheat (Triticum aestivum L.);sedimentation volume;conditional QTL mapping

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.

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

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