Quantitative trait loci for Fusarium and Gibberella ear rot resistance in Argentinian maize germplasm

Giomi, Gerardo Mario; Kreff, Enrique Domingo; Iglesias, Juliana; Fauguel, Carolina M.; Fernández, Mariana F.; Oviedo, María Silvina; Presello, Daniel A.

doi:10.1007/s10681-016-1725-z

Cited by 35 publications

(32 citation statements)

References 29 publications

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“…More recent studies reported that although most QTL for FER are minor QTL, some major QTL whose effects on FER were validated by near-isogenic lines could be managed by marker-assisted breeding [ 54 , 55 , 56 , 57 ]. In addition, as the number of mapping populations explored increased, the overlapping of QTL for FER found in different populations started to be more common [ 55 , 58 , 59 ].…”

Section: Mapping Of Qtl For Fer And/or Fumonisin Content In Bi-parmentioning

confidence: 99%

Genomics of Maize Resistance to Fusarium Ear Rot and Fumonisin Contamination

Santiago

Cao

Malvar

et al. 2020

Toxins

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Food contamination with mycotoxins is a worldwide concern, because these toxins produced by several fungal species have detrimental effects on animal and/or human health. In maize, fumonisins are among the toxins with the highest threatening potential because they are mainly produced by Fusarium verticillioides, which is distributed worldwide. Plant breeding has emerged as an effective and environmentally safe method to reduce fumonisin levels in maize kernels, but although phenotypic selection has proved effective for improving resistance to fumonisin contamination, further resources should be mobilized to meet farmers’ needs. Selection based on molecular markers linked to quantitative trait loci (QTL) for resistance to fumonisin contamination or/and genotype values obtained using prediction models with markers distributed across the whole genome could speed up breeding progress. Therefore, in the current paper, previously identified genomic regions, genes, and/or pathways implicated in resistance to fumonisin accumulation will be reviewed. Studies done until now have provide many markers to be used by breeders, but to get further insight on plant mechanisms to defend against fungal infection and to limit fumonisin contamination, the genes behind those QTLs should be identified.

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Section: Mapping Of Qtl For Fer And/or Fumonisin Content In Bi-parmentioning

confidence: 99%

Genomics of Maize Resistance to Fusarium Ear Rot and Fumonisin Contamination

Santiago

Cao

Malvar

et al. 2020

Toxins

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show abstract

“…However, conventional breeding can be hampered by the complex genetic architecture of resistance to fumonisin accumulation that appears to be controlled by many quantitative trait loci (QTL) of small effect [1]. In an attempt to avoid this problem, authors have tried to find markers linked to genes involved in resistance to Fusarium ear rot (FER) and/or fumonisin contamination to use them in marker-assisted selection programs [6][7][8][9][10][11][12]. Many studies were focused on detecting QTL for resistance to FER; QTL were identified in all chromosomes, except in chromosome 9.…”

Section: Introductionmentioning

confidence: 99%

Genome-wide association analysis for fumonisin content in maize kernels

et al. 2019

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Background: Plant breeding has been proposed as one of the most effective and environmentally safe methods to control fungal infection and to reduce fumonisin accumulation. However, conventional breeding can be hampered by the complex genetic architecture of resistance to fumonisin accumulation and marker-assisted selection is proposed as an efficient alternative. In the current study, GWAS has been performed for the first time for detecting high-resolution QTL for resistance to fumonisin accumulation in maize kernels complementing published GWAS results for Fusarium ear rot. Results: Thirty-nine SNPs significantly associated with resistance to fumonisin accumulation in maize kernels were found and clustered into 17 QTL. Novel QTLs for fumonisin content would be at bins 3.02, 5.02, 7.05 and 8.07. Genes with annotated functions probably implicated in resistance to pathogens based on previous studies have been highlighted. Conclusions: Breeding approaches to fix favorable functional variants for genes implicated in maize immune response signaling may be especially useful to reduce kernel contamination with fumonisins without significantly interfering in mycelia development and growth and, consequently, in the beneficial endophytic behavior of Fusarium verticillioides.

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“…Giomi et al . 26 reported QTL for ear rot accounting for 5% to 11.9% of the phenotypic variation in a bi-parental population. Another bi-parental population reported FSR QTL explaining up to 12.6% 27 , and GWAS panels representing the maize core diversity and U.S.A. inbred lines reported R 2 between 3% to 12% 19–22 .…”

Section: Discussionmentioning

confidence: 99%

“…Resistance to the disease is indeed a quantitative trait under polygenic control 23 . Previous studies reported a number of quantitative trait loci (QTL) associated with FER resistance and identified multiple loci with relatively small effect 17,19,24–26 . At the seedling stage, the evaluation of genetic resistance to Fusarium seedling rot (FSR) may benefit from seed inoculation with F .…”

Section: Introductionmentioning

confidence: 99%

Unravelling the genetic basis of Fusarium seedling rot resistance in the MAGIC maize population: novel targets for breeding

Septiani

Lanubile

Stagnati

et al. 2019

Sci Rep

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Fungal infection by Fusarium verticillioides is cause of prevalent maize disease leading to substantial reductions in yield and grain quality worldwide. Maize resistance to the fungus may occur at different developmental stages, from seedling to maturity. the breeding of resistant maize genotypes may take advantage of the identification of quantitative trait loci (QTL) responsible for disease resistance already commenced at seedling level. The Multi-parent Advance Generation Intercross (MAGIC) population was used to conduct high-definition QTL mapping for Fusarium seedling rot (FSR) resistance using rolled towel assay. Infection severity level, seedling weight and length were measured on 401 MAGIC maize recombinant inbred lines (RILs). QTL mapping was performed on reconstructed RIL haplotypes. One-fifth of the MAGIC RILs were resistant to FSR and 10 QTL were identified. For FSR, two QTL were detected at 2.8 Mb and 241.8 Mb on chromosome 4, and one QTL at 169.6 Mb on chromosome 5. Transcriptomic and sequencing information generated on the MAGIC founder lines was used to guide the identification of eight candidate genes within the identified FSR QTL. We conclude that the rolled towel assay applied to the MAGIC maize population provides a fast and cost-effective method to identify QTL and candidate genes for early resistance to F. verticillioides in maize. Maize (Zea mays L.) is a key crop for food, feed, and industrial products. It is the cereal species with the highest grain production worldwide, with more than one billion tons harvested each year 1. Maize production, however, is menaced by numerous pathogens that affect both the quantity and the quality of the grain produced 2-4. The occurrence of the diseases varies by year and depends on several factors including environment, susceptibility of maize varieties, and cropping practices 5. In recent years, climate change is causing disease outbreaks even in geographic regions in which they were infrequent in the past 6. Fusarium verticillioides (Sacc.) Nirenberg is a predominant endophyte and pathogen of maize causing substantial yield losses and reduction of grain quality. Maize can be infected by the fungus at all growth stages, from the early vegetative phases to maturity. The fungus can be transmitted through infected kernels and cause systemic infection that eventually contribute to the development of seedling diseases 7 including seedling rot 8,9 , root rot and stalk rot 7. Indeed, in seedling rot, reduction in seed emergence and seedling growth may be observed when seedlings are inoculated with F. verticillioides strains producing fumonisin B 1 10,11. The amount of damage caused by this disease depends on the extent of rotting: if rot is extensive, the embryo may die and the seed will not germinate. Even for seeds that are not severely rotted, germination in unfavorable environments will be slow or absent due to presence of the internal fungus 2. In many plant-pathogen interactions, the expression of the resistance to pathogens depends on the stage of develo...

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Quantitative trait loci for Fusarium and Gibberella ear rot resistance in Argentinian maize germplasm

Cited by 35 publications

References 29 publications

Genomics of Maize Resistance to Fusarium Ear Rot and Fumonisin Contamination

Genomics of Maize Resistance to Fusarium Ear Rot and Fumonisin Contamination

Genome-wide association analysis for fumonisin content in maize kernels

Unravelling the genetic basis of Fusarium seedling rot resistance in the MAGIC maize population: novel targets for breeding

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