First Report of Anthracnose Stalk Rot of Maize Caused by <i>Colletotrichum graminicola</i> in Switzerland

Sukno, Serenella A.; Sanz-Martín, José M.; González‐Fuente, Manuel; Hiltbrunner, Jürg; Thon, Michael R.

doi:10.1094/pdis-09-13-0912-pdn

Cited by 8 publications

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“…In addition to temperate areas, maize anthracnose is also reported in tropical and subtropical regions, including Brazil and Argentina, where warm and humid conditions contribute to augment the disease [41][42][43][44][45][46][47][48]. Since the first report of anthracnose in Europe, (Italy in 1852) [49], several countries have reported the occurrence of the disease, including Germany, France, and ex Czechoslovakia [50][51][52], and more recently Croatia, Portugal, Switzerland, Bosnia and Herzegovina [53][54][55][56][57]. Recently, maize anthracnose also was reported in Asia [58], indicating that the pathogen is increasing its geographic range.…”

Section: Introductionmentioning

confidence: 99%

Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose

Rogério

Baroncelli

Cuevas-Fernández

et al. 2022

Preprint

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BackgroundColletotrichum graminicola, the causal agent of maize anthracnose, is an important crop disease worldwide. Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. The genus Colletotrichum is largely recognized as asexual, but several species have been reported to have a sexual cycle. Here, we employed a population genomics approach to investigate the genetic diversity and reproductive biology of C. graminicola isolates infecting maize. We sequenced 108 isolates of C. graminicola collected in 14 countries using restriction site-associated DNA sequencing (RAD-Seq) and whole-genome sequencing (WGS).ResultsClustering analyses based on single-nucleotide polymorphisms showed populational differentiation at a global scale, with three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen, and geographic subdivision. Distinct levels of genetic diversity were observed between these clades, suggesting different evolutionary histories. Intra and inter-continental migration was predicted between Europe and South America, likely associated with the movement of contaminated germplasm. Low clonality and evidence of genetic recombination were detected from the analysis of linkage disequilibrium and the pairwise homoplasy index (PHI) test for clonality. We show evidence that even if rare (possibly due to losses of sex and meiosis-associated genes) C. graminicola can undergo sexual recombination based on lab assays and genomic analyses.ConclusionsOur results support hypotheses of intra and intercontinental pathogen migration and genetic recombination with great impact on C. graminicola population structure.

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Section: Introductionmentioning

confidence: 99%

Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose

Rogério

Baroncelli

Cuevas-Fernández

et al. 2022

Preprint

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“…Colletotrichum graminicola is one of the most economically disruptive fungi of corn and the causative agent of a disease associated with 5-20% corn yield loss in the United States alone (Sukno et al, 2008(Sukno et al, , 2014Jackson-Ziems et al, 2014). This pathogen can infect and cause disease primarily the leaves and stem of maize, where it leads to anthracnose leaf blight (ALB) and stalk rot diseases, respectively.…”

Section: Introductionmentioning

confidence: 99%

Raman-Based Diagnostics of Stalk Rot Disease of Maize Caused by Colletotrichum graminicola

et al. 2021

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Stalk rot caused by Colletotrichum graminicola is a disease of worldwide importance. Stalk rot is difficult to detect at the early stages of infection because the fungus colonizes the tissues inside the maize stem. Current diagnostic methods are time-consuming, laborious, and destructive to the stem tissue. We utilized Raman spectroscopy to follow the development of stalk rot in three different maize genotypes grown either in the field or the greenhouse. We then used the acquired spectra to calibrate statistical models to differentiate amongst the different disease timepoints and the genotypes themselves. This non-invasive spectroscopic method enabled high-accuracy identification of stalk rot based on both stalk and leaf spectra. We additionally found that leaf spectra were favorable for identifying maize by genotype. Finally, we identified Raman bands that showed correlation with the sizes of stalk rot-associated lesions in the stems. We demonstrated that Raman spectroscopy is a viable tool for detection of stalk rot disease, as well as potent for the differentiation of maize genotypes.

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Colletotrichum species and complexes: geographic distribution, host range and conservation status

2021

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First Report of Anthracnose Stalk Rot of Maize Caused by Colletotrichum graminicola in Switzerland

Abstract: Plant Dis. 98:694, 2014; published online as http:// dx.

Cited by 8 publications

References 0 publications

Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose

Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose

Raman-Based Diagnostics of Stalk Rot Disease of Maize Caused by Colletotrichum graminicola

Colletotrichum species and complexes: geographic distribution, host range and conservation status

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