The Genetic Structures and Molecular Mechanisms Underlying Ear Traits in Maize (Zea mays L.)
Zhenying Dong1,2, Yanbo Wang1, Jianxi Bao1
1Research Institute of Biology and Agriculture, Shunde Innovation School, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Cells
|July 29, 2023
Summary
Researchers analyzed maize ear traits to boost crop yield. They identified key genetic regions and candidate genes, offering valuable insights for breeding programs aiming to improve this vital food source.
Area of Science:
- Plant genetics
- Agricultural science
- Crop improvement
Background:
- Maize (Zea mays L.) is a crucial global food staple.
- Enhancing maize yield is essential for food security.
- Ear traits significantly influence maize yield and are quantitatively inherited.
Purpose of the Study:
- To genetically dissect maize ear traits for yield improvement.
- To refine quantitative trait loci (QTL) and quantitative trait nucleotide (QTN) clusters associated with ear traits.
- To identify candidate genes for enhancing maize yield.
Main Methods:
- Integrated genome-wide association study (GWAS) and QTL mapping data.
- Refined 153 QTL and 85 QTN clusters.
- Identified common intervals (CIs) and pleiotropic CIs affecting ear traits.
Main Results:
- Shortlisted 19 common intervals detected by both GWAS and QTL mapping.
- Identified 40 CIs with pleiotropic effects on ear traits.
- Predicted candidate genes from 71 QTL and 25 QTN clusters for potential yield enhancement.
Conclusions:
- The study provides a refined genetic framework for maize ear traits.
- Identified candidate genes offer targets for marker-assisted selection and breeding.
- Findings contribute to strategies for improving maize yield in breeding programs.
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