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| Identification of quantitative trait loci and epistasis for root characteristics and root exudations in maize （Zea mays L.） under deficient phosphorus | |
| 作者姓名： | CHEN Jun-yi CAI Yi-lin XU Li WANG Jiu-guang ZHANG Wen-long LIU Zhi-zai PENG Kun ZHU Zhao-jing HUANG Zu-chun AI Ji-zhou TANG Quan DENG Bu-hu YANG Zhi-guo LUO Jing SUN Shuang-ling |
| 作者单位： | CHEN Jun-yi(Chongqing Medical and PharmaceuUcal College, Chongqing 401331, P.R. China);CAI Yi-lin,WANG Jiu-guang,ZHANG Wen-long,LIU Zhi-zai(Key Laboratory of Biotechnotogy and Crop Quality Improvement, Ministry of Agnculture;Maize Institute of Southwest University,Chongqing 400716,P.R.China);XU Li,PENG Kun,ZHU Zhao-jing,HUANG Zu-chun,AI Ji-zhou,TANG Quan,DENG Bu-hua,YANG Zhi-guo,LUO Jing,SUN Shuang-ling(Chongqing Medical and Pharmaceutical College, Chongqing 401331, P.R. China) |
| 基金项目： | Funded by Chongqing Key Scientific and Technological Project (No. CSTC2007AB1045) and Chinese Key Scientific and Technological Project (No. 2006BAD13B03). |
| 摘 要： | The phosphorus uptake （PU） in above-ground parts of plant, root characteristics and root exudations as well as the quantitative trait loci （QTLs） associated with these characteristics were determined for a F2：3 population derived from the cross of two contrasting maize （Zea mays L.） genotypes, 082 and Yel07. A total of 241 F2：3 families were evaluated in replicated trials under deficient phosphorus conditions in 2007 at two sites （Kaixian County and Southwest University, Chongqing, P. R. China）. The results show pleiotropy and close linkage among QTLs. Four common regions in different environments were in bnlg100- bnlg1268b （bins 1.02） for QTL of H＋, bnlg1268a-umc1290a （bins 1.09） for QTL of AP （acid phospbatase activity）, dupssrl5- P 1MT/a （bins 6.06） for QTLs of PU （phosphorus uptake） and RW （root weight）, and P IM3/d-P1M3/g （bins9.04） for QTLs of PU and AP. These QTLs are non-environment or minor QTLs x environment. By epistatic analysis, three main QTLs and eighteen QTLs x QTLs interactions were detected for the seven measured characteristics. These QTLs may affect trait expression by epistatic interaction with the other loci, and make a substantial contribution to phosphorus utilization efficiency, which should be considered when breeding maize varieties with high P efficiency. Two regions were detected in dupssrl 5- P1MT/a （bins 6.06） for QTL of RW and P1M3/d- P 1M3/g （bins 9.04） for QTL of PU and AP. They were detected in two different environments and by two methods of QTL analysis, which were useful for marker-assisted selection. |
| 关 键 词： | maize root characteristics root exudations quantitative trait loci analysis epistasis |
| 收稿时间： | 2010/4/21 0:00:00 |
Identification of QTLs and epistatisis for root characteristics and root exudations in maize (Zea mays L.) under deficient phosphorus |
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| CHEN Jun-yi,CAI Yi-lin,XU Li,WANG Jiu-guang,ZHANG Wen-long,LIU Zhi-zai,PENG Kun,ZHU Zhao-jing,HUANG Zu-chun,AI Ji-zhou,TANG Quan,DENG Bu-hu,YANG Zhi-guo,LUO Jing,SUN Shuang-ling.Identification of QTLs and epistatisis for root characteristics and root exudations in maize (Zea mays L.) under deficient phosphorus[J].Journal of Chongqing University,2010,9(2):105-116. | |
| Authors: | CHEN Jun-yi CAI Yi-lin XU Li WANG Jiu-guang ZHANG Wen-long LIU Zhi-zai PENG Kun ZHU Zhao-jing HUANG Zu-chun AI Ji-zhou TANG Quan DENG Bu-hu YANG Zhi-guo LUO Jing and SUN Shuang-ling |
| Institution: | 1. Chongqing Medical and PharmaceuUcal College, Chongqing 401331, P.R. China 2. Key Laboratory of Biotechnotogy and Crop Quality Improvement, Ministry of Agnculture;Maize Institute of Southwest University,Chongqing 400716,P.R.China 3. Chongqing Medical and Pharmaceutical College, Chongqing 401331, P.R. China |
| Abstract: | The phosphorus uptake (PU) in above-ground parts of plant, root characteristics and root exudations as well as the quantitative trait loci (QTLs) associated with these characteristics were determined for a F2:3 population derived from the cross of two contrasting maize (Zea mays L.) genotypes, 082 and Ye107. A total of 241 F2:3 families were evaluated in replicated trials under deficient phosphorus conditions in 2007 at two sites (Kaixian County and Southwest University, Chongqing, P. R. China). The results show pleiotropy and close linkage among QTLs. Four common regions in different environments were in bnlg100-bnlgl268b (bins 1.02) for QTL of H+, bnlg1268a-umc1290a (bins 1.09) for QTL of AP (acid phosphatase activity), dupssr15-P1M7/a (bins 6.06) for QTLs of PU (phosphorus uptake) and RW (root weight), and P1M3/d-PIM3/g (bins9.04) for QTLs of PU and AP. These QTLs are non-environment or minor QTLs × environment. By epistatic analysis, three main QTLs and eighteen QTLs × QTLs interactions were detected for the seven measured characteristics. These QTLs may affect trait expression by epistatic interaction with the other loci, and make a substantial contribution to phosphorus utilization efficiency, which should be considered when breeding maize varieties with high P efficiency. Two regions were detected in dupssrl 5- P1M7/a (bins 6.06) for QTL of RW and P1M3/d- P1M3/g (bins 9.04) for QTL of PU and AP. They were detected in two different environments and by two methods of QTL analysis, which were useful for marker-assisted selection. |
| Keywords: | maize root characteristics root exudations quantitative trait loci analysis epistasis |
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