Genetics of Germination and Seedling Traits under Drought Stress in a MAGIC Population of Maize
| Autor: | Abderahmane Djemel, Pedro Revilla, Ana López-Malvar, Meriem Riache, Soumeya Rida, Oula Maafi |
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| Přispěvatelé: | École Nationale Supérieure Agronomique (Algérie), European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Xunta de Galicia |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Candidate gene
Drought tolerance Population Genome-wide association study Single-nucleotide polymorphism Plant Science maize Article 3103.01 Producción de Cultivos education Ecology Evolution Behavior and Systematics Abiotic component education.field_of_study Ecology biology fungi drought stress seedlings Botany food and beverages biology.organism_classification 2511 Ciencias del Suelo (Edafología) Agronomy germination Germination Seedling QK1-989 genome wide association study (GWAS) 3103.05 Técnicas de Cultivo candidate genes |
| Zdroj: | Plants Volume 10 Issue 9 Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) Digital.CSIC. Repositorio Institucional del CSIC instname Plants, Vol 10, Iss 1786, p 1786 (2021) |
| ISSN: | 2223-7747 2019-1081 |
| DOI: | 10.3390/plants10091786 |
| Popis: | Drought is one of the most detrimental abiotic stresses hampering seed germination, development, and productivity. Maize is more sensitive to drought than other cereals, especially at seedling stage. Our objective was to study genetic regulation of drought tolerance at germination and during seedling growth in maize. We evaluated 420 RIL with their parents from a multi-parent advanced generation inter-cross (MAGIC) population with PEG-induced drought at germination and seedling establishment. A genome-wide association study (GWAS) was carried out to identify genomic regions associated with drought tolerance. GWAS identified 28 and 16 SNPs significantly associated with germination and seedling traits under stress and well-watered conditions, respectively. Among the SNPs detected, two SNPs had significant associations with several traits with high positive correlations, suggesting a pleiotropic genetic control. Other SNPs were located in regions that harbored major QTLs in previous studies, and co-located with QTLs for cold tolerance previously published for this MAGIC population. The genomic regions comprised several candidate genes related to stresses and plant development. These included numerous drought-responsive genes and transcription factors implicated in germination, seedling traits, and drought tolerance. The current analyses provide information and tools for subsequent studies and breeding programs for improving drought tolerance. This research was funded by the École Nationale Supérieure Agronomique; PRIMA, a program supported by the European Union under H2020 framework programme; and Spanish Ministerio de Innovación y Universidades (MCIU), the Agencia Estatal de Investigación (AEI) and the European Fund for Regional Development (FEDER), UE (project code PID2019-108127RB-I00). Financial support has been also provided by PRIMA, a program supported by the European Union under the H2020 framework programme and by the project IN607A2021/07 from Xunta de Galicia. |
| Databáze: | OpenAIRE |
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