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| Conditional QTL Mapping of Sedimentation Volume on Seven Quality Traits in Common Wheat |
| 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 |
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, Tai’an 271018, P.R.China
2.Agricultural Technology Popularization Station, Jining 272000, P.R.China
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, Beijing 100101, P.R.China
4.Central Agricultural Technology Station, Jining 272000, P.R.China |
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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.
Abstract 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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Received: 09 November 2012
Accepted:
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| Fund: The research was supported by the Natural Science Foundation of Shandong Province, China (ZR2009DQ009), the National Natural Science Foundation of China (30971764 and 31171554) and the National Major Projects of Cultivated Transgenic New Varieties Foundation of China (2011ZX08002-003 and 2009ZX08002-017B). |
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Corresponding Authors:
TIAN Ji-chun, Tel/Fax: +86-538-8242040, E-mail: jctian9666@163.com
E-mail: jctian9666@163.com
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| About author: DENG Zhi-ying, E-mail: deng868@163.com |
Cite this article:
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.
2013.
Conditional QTL Mapping of Sedimentation Volume on Seven Quality Traits in Common Wheat. Journal of Integrative Agriculture, 12(12): 2125-2133.
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