Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III
Abstract Background Plant height (PH) and ear height (EH) are two important agronomic traits in maize selection breeding. F1 hybrid exhibit significant heterosis for PH and EH as compared to their parental inbred lines. To understand the genetic basis of heterosis controlling PH and EH, we conducted...
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BMC
2017-04-01
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| Series: | BMC Genetics |
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| Online Access: | http://link.springer.com/article/10.1186/s12863-017-0503-9 |
| _version_ | 1828395248612540416 |
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| author | Hongjian Li Qingsong Yang Nannan Fan Ming Zhang Huijie Zhai Zhongfu Ni Yirong Zhang |
| author_facet | Hongjian Li Qingsong Yang Nannan Fan Ming Zhang Huijie Zhai Zhongfu Ni Yirong Zhang |
| author_sort | Hongjian Li |
| collection | DOAJ |
| description | Abstract Background Plant height (PH) and ear height (EH) are two important agronomic traits in maize selection breeding. F1 hybrid exhibit significant heterosis for PH and EH as compared to their parental inbred lines. To understand the genetic basis of heterosis controlling PH and EH, we conducted quantitative trait locus (QTL) analysis using a recombinant inbreed line (RIL) based design III population derived from the elite maize hybrid Zhengdan 958 in five environments. Results A total of 14 environmentally stable QTLs were identified, and the number of QTLs for Z1 and Z2 populations was six and eight, respectively. Notably, all the eight environmentally stable QTLs for Z2 were characterized by overdominance effect (OD), suggesting that overdominant QTLs were the most important contributors to heterosis for PH and EH. Furthermore, 14 environmentally stable QTLs were anchored on six genomic regions, among which four are trait-specific QTLs, suggesting that the genetic basis for PH and EH is partially different. Additionally, qPH.A-1.3, modifying about 10 centimeters of PH, was further validated in backcross populations. Conclusions The genetic basis for PH and EH is partially different, and overdominant QTLs are important factors for heterosis of PH and EH. A major QTL qPH.A-1.3 may be a desired target for genetic improvement of maize plant height. |
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| institution | Directory Open Access Journal |
| issn | 1471-2156 |
| language | English |
| last_indexed | 2024-12-10T08:08:22Z |
| publishDate | 2017-04-01 |
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| series | BMC Genetics |
| spelling | doaj.art-f89d95555c0c417ca247081fd0d27dd22022-12-22T01:56:37ZengBMCBMC Genetics1471-21562017-04-0118111010.1186/s12863-017-0503-9Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design IIIHongjian Li0Qingsong Yang1Nannan Fan2Ming Zhang3Huijie Zhai4Zhongfu Ni5Yirong Zhang6State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityState Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis Utilization (MOE), China Agricultural UniversityAbstract Background Plant height (PH) and ear height (EH) are two important agronomic traits in maize selection breeding. F1 hybrid exhibit significant heterosis for PH and EH as compared to their parental inbred lines. To understand the genetic basis of heterosis controlling PH and EH, we conducted quantitative trait locus (QTL) analysis using a recombinant inbreed line (RIL) based design III population derived from the elite maize hybrid Zhengdan 958 in five environments. Results A total of 14 environmentally stable QTLs were identified, and the number of QTLs for Z1 and Z2 populations was six and eight, respectively. Notably, all the eight environmentally stable QTLs for Z2 were characterized by overdominance effect (OD), suggesting that overdominant QTLs were the most important contributors to heterosis for PH and EH. Furthermore, 14 environmentally stable QTLs were anchored on six genomic regions, among which four are trait-specific QTLs, suggesting that the genetic basis for PH and EH is partially different. Additionally, qPH.A-1.3, modifying about 10 centimeters of PH, was further validated in backcross populations. Conclusions The genetic basis for PH and EH is partially different, and overdominant QTLs are important factors for heterosis of PH and EH. A major QTL qPH.A-1.3 may be a desired target for genetic improvement of maize plant height.http://link.springer.com/article/10.1186/s12863-017-0503-9HeterosisPlant heightEar heightDesign IIIMaize |
| spellingShingle | Hongjian Li Qingsong Yang Nannan Fan Ming Zhang Huijie Zhai Zhongfu Ni Yirong Zhang Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III BMC Genetics Heterosis Plant height Ear height Design III Maize |
| title | Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III |
| title_full | Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III |
| title_fullStr | Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III |
| title_full_unstemmed | Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III |
| title_short | Quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design III |
| title_sort | quantitative trait locus analysis of heterosis for plant height and ear height in an elite maize hybrid zhengdan 958 by design iii |
| topic | Heterosis Plant height Ear height Design III Maize |
| url | http://link.springer.com/article/10.1186/s12863-017-0503-9 |
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