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Genome-wide association analysis for fumonisin content in maize kernels
L F Samayoa1,2, A Cao1,3,4, R Santiago3,4
1Misión Biológica de Galicia (MBG - CSIC), Box 28, 36080, Pontevedra, Spain.
BMC Plant Biology
|April 29, 2019
Summary
Maize breeding can reduce fumonisin contamination using marker-assisted selection. This study identified 39 SNPs linked to resistance, aiding in developing healthier crops and safer food products.
Area of Science:
- Agricultural Science
- Genetics
- Plant Pathology
Background:
- Plant breeding is a key strategy for controlling fungal infections and reducing fumonisin accumulation in crops.
- Complex genetic factors can hinder conventional breeding for fumonisin resistance.
- Marker-assisted selection offers an efficient alternative for breeding resistant maize varieties.
Purpose of the Study:
- To conduct a high-resolution Genome-Wide Association Study (GWAS) for identifying quantitative trait loci (QTL) associated with fumonisin accumulation resistance in maize kernels.
- To complement existing GWAS data on Fusarium ear rot resistance.
Main Methods:
- Genome-Wide Association Study (GWAS) was performed on maize kernels.
- Analysis focused on identifying single nucleotide polymorphisms (SNPs) associated with resistance to fumonisin accumulation.
- Results were compared with published GWAS data for Fusarium ear rot.
Main Results:
- Thirty-nine significant SNPs associated with fumonisin accumulation resistance were identified.
- These SNPs were clustered into 17 QTL, including novel QTLs in bins 3.02, 5.02, 7.05, and 8.07.
- Genes with potential roles in pathogen resistance were highlighted.
Conclusions:
- Breeding strategies can target favorable variants in maize immune response genes.
- This approach can reduce kernel fumonisin contamination.
- It aims to minimize interference with the beneficial endophytic interactions of Fusarium verticillioides.
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