A genome-wide association study investigating fumonisin contamination in a panel of tropical maize elite lines

A genome-wide association study investigating fumonisin contamination in a panel of tropical maize elite lines

Native genetic resistance is an effective and environmental-friendly alternative to control fungal infections and reduce fumonisin content in maize kernels. Marker-assisted selection can accelerate the genetic gains over breeding cycles. This study aimed to identify genomic regions and candidate gen...

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Bibliographic Details
Published in:Euphytica Vol. 218; no. 9
Main Authors: da Silva, Karla Jorge, Guimarães, Claudia Teixeira, Tinoco, Sylvia Morais de Sousa, Bernardino, Karine da Costa, Trindade, Roberto dos Santos, Queiroz, Valéria Aparecida Vieira, da Conceição, Renata Regina Pereira, Guilhen, José Henrique Soler, de Oliveira, Natanael Tavares, Damasceno, Cynthia Maria Borges, Noda, Roberto Willians, Dias, Luiz Antônio dos Santos, Guimarães, Lauro José Moreira, Melo, Janaína de Oliveira, Pastina, Maria Marta
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-09-2022
Springer
Springer Nature B.V
Subjects:
Alleles
Biomedical and Life Sciences
Biotechnology
Contamination
Corn
Drug resistance in microorganisms
Ear rot
Genes
Genetic aspects
Genetic improvement
Genome-wide association studies
Genomes
Genomics
Health aspects
Inbreeding
Infection control
Investigations
Life Sciences
Marker-assisted selection
Mycoses
Nucleotides
Pathogens
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Quantitative genetics
Quantitative trait loci
Single nucleotide polymorphisms
Single-nucleotide polymorphism
Inbred lines
Candidate gene
Mycotoxins
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Description
Summary:Native genetic resistance is an effective and environmental-friendly alternative to control fungal infections and reduce fumonisin content in maize kernels. Marker-assisted selection can accelerate the genetic gains over breeding cycles. This study aimed to identify genomic regions and candidate genes associated to fumonisin contamination in a panel of tropical maize elite lines. A total of 205 inbred lines were grown under field conditions in Brazil to measure the fumonisin content in grains. The lines were genotyped by sequencing, generating 385,654 high-quality polymorphic single-nucleotide polymorphisms (SNPs). The Genome Wide Association Study (GWAS) identified 40 SNPs located on 19 genomic regions associated to the fumonisin contamination, of which seven were coincident with other studies. Six candidate genes localized within these QTL regions shared functions related with pathogen resistance, six shared functions related with pathogen resistance, including one associated with Fusarium ear rot also identified at bin 10.03 in a previous study. Tropical maize lines resistant to fumonisin contamination were at low frequency in the Embrapa’s panel, but most of the resistant lines shared more than 73% of the resistance alleles at SNP loci associated with the trait. Thus, favorable alleles could be potentially used to improve resistance to fumonisin contamination in maize.
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-022-03082-0