QTL mapping for foxtail millet plant height in multi-environment using an ultra-high density bin map
| Autor: | Erhu Guo, Suying Wang, Yuhui Li, Haigang Wang, Junxia Li, Shutao Dai, Zhijun Qiao, Haijin Zhang, Qiang He, Xing Lu, Xianmin Diao, Junjun Yang, Jinrong Liu, Aiying Zhang, Guanqing Jia, Huifang Liu, Yanchao Jia, Guoqiu Chen, Hui Zhi, Wei Zhang, Jun Liu, Ming Gao, Sha Tang, Shujie Li |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Setaria Candidate gene Population Quantitative Trait Loci Setaria Plant Quantitative trait locus 01 natural sciences Polymorphism Single Nucleotide Chromosomes Plant Inbred strain Gene Expression Regulation Plant Genetics Cultivar education Gene Plant Proteins education.field_of_study biology fungi food and beverages Chromosome Mapping High-Throughput Nucleotide Sequencing General Medicine biology.organism_classification Plant Breeding Foxtail Agronomy and Crop Science Genome Plant 010606 plant biology & botany Biotechnology |
| Zdroj: | TAG. Theoretical and applied genetics. Theoretische und angewandte GenetikReferences.. 134(2) |
| ISSN: | 1432-2242 |
| Popis: | Using a fixed RIL population derived from a widely used foxtail millet backbone breeding line and an elite cultivar, we constructed a high-density bin map and identified six novel multi-environment effect QTLs and seven candidate genes for dwarf phenotype. Plant height is an important trait that determines tradeoffs between competition and resource allocation, which is crucial for yield potential. To improve the C4 model plant foxtail millet (Setaria italica) productivity, it is necessary to isolate plant height-related genes that contribute to ideal plant architecture in breeding. In the present study, we generated a foxtail millet population of 333 recombinant inbred lines (RILs) derived from a cross between a backbone line Ai 88 and an elite cultivar Liaogu 1. We evaluated plant height in 13 environmental conditions across 4 years, the mean plant height of the RIL population ranged from 89.5 to 149.9 cm. Using deep re-sequencing data, we constructed a high-density bin map with 3744 marker bins. Quantitative trait locus (QTL) mapping identified 26 QTLs significantly associated with plant height. Of these, 13 QTLs were repeatedly detected under multiple environments, including six novel QTLs that have not been reported before. Seita.1G242300, a gene encodes gibberellin 2-oxidase-8, which was detected in nine environments in a 1.54-Mb interval of qPH1.3, was considered as an important candidate gene. Moreover, other six genes involved in GA biosynthesis or signaling pathways, and fifteen genes encode F-box domain proteins which might function as E3 ligases, were also considered as candidate genes in different QTLs. These QTLs and candidate genes identified in this study will help to elucidate the genetic basis of foxtail millet plant height, and the linked markers will be useful for marker-assistant selection of varieties with ideal plant architecture and high yield potential. |
| Databáze: | OpenAIRE |
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