Mating Types of <i>Phaeosphaeria nodorum</i> (anamorph <i>Stagonospora nodorum</i>) from Central Asia

Vergnes, D. Mercado; Zhanarbekova, A.; Renard, Marie Éve; Duveiller, E.; Maraite, Henri

doi:10.1111/j.1439-0434.2006.01100.x

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…Halama and Lacoste ( 1992 ) demonstrated that the production of sexual fruiting bodies known as pseudothecia in P. nodorum are maximal at 10 °C and absent at temperatures above 14 °C. From this, Vergnes et al ( 2006 ) proposed that the production of pseudothecia is promoted during the snow melting period. We can only speculate that this event may be conducive in triggering maximal production of airborne ascospores that are responsible for infection of young wheat leaves grown in colder regions of Central Asia.…”

Section: Discussionmentioning

confidence: 99%

Novel sources of resistance to Septoria nodorum blotch in the Vavilov wheat collection identified by genome-wide association studies

et al. 2018

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Key messageThe fungus Parastagonospora nodorum causes Septoria nodorum blotch (SNB) of wheat. A genetically diverse wheat panel was used to dissect the complexity of SNB and identify novel sources of resistance.AbstractThe fungus Parastagonospora nodorum is the causal agent of Septoria nodorum blotch (SNB) of wheat. The pathosystem is mediated by multiple fungal necrotrophic effector–host sensitivity gene interactions that include SnToxA–Tsn1, SnTox1–Snn1, and SnTox3–Snn3. A P. nodorum strain lacking SnToxA, SnTox1, and SnTox3 (toxa13) retained wild-type-like ability to infect some modern wheat cultivars, suggesting evidence of other effector-mediated susceptibility gene interactions or the lack of host resistance genes. To identify genomic regions harbouring such loci, we examined a panel of 295 historic wheat accessions from the N. I. Vavilov Institute of Plant Genetic Resources in Russia, which is comprised of genetically diverse landraces and breeding lines registered from 1920 to 1990. The wheat panel was subjected to effector bioassays, infection with P. nodorum wild type (SN15) and toxa13. In general, SN15 was more virulent than toxa13. Insensitivity to all three effectors contributed significantly to resistance against SN15, but not toxa13. Genome-wide association studies using phenotypes from SN15 infection detected quantitative trait loci (QTL) on chromosomes 1BS (Snn1), 2DS, 5AS, 5BS (Snn3), 3AL, 4AL, 4BS, and 7AS. For toxa13 infection, a QTL was detected on 5AS (similar to SN15), plus two additional QTL on 2DL and 7DL. Analysis of resistance phenotypes indicated that plant breeders may have inadvertently selected for effector insensitivity from 1940 onwards. We identify accessions that can be used to develop bi-parental mapping populations to characterise resistance-associated alleles for subsequent introgression into modern bread wheat to minimise the impact of SNB.Electronic supplementary materialThe online version of this article (10.1007/s00122-018-3073-y) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Novel sources of resistance to Septoria nodorum blotch in the Vavilov wheat collection identified by genome-wide association studies

et al. 2018

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“…S. nodorum is a heterothallic species. The ratios of the different mating types have been studied in populations from all over the world and were found not to differ significantly from the expected 1:1 (12,15,72,96,107). This indicates that sexual reproduction is frequent under all conditions.…”

Section: Population Genetics and Biogeographymentioning

confidence: 95%

Stagonospora nodorum: From Pathology to Genomics and Host Resistance

Oliver

Friesen²,

Faris³

et al. 2012

Annu. Rev. Phytopathol.

170

151

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Stagonospora nodorum is a major necrotrophic pathogen of wheat that causes the diseases S. nodorum leaf and glume blotch. A series of tools and resources, including functional genomics, a genome sequence, proteomics and metabolomics, host-mapping populations, and a worldwide collection of isolates, have enabled the dissection of pathogenicity mechanisms. Metabolic and signaling genes required for pathogenicity have been defined. Interaction with the host is dominated by interplay of fungal effectors that induce necrosis on wheat lines carrying specific sensitivity loci. As such, the pathogen has emerged as a model for the Pleosporales group of pathogens.

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“…Some genera are known as important plant pathogens. These include such examples as Cochliobolus, Fusarium and Pyrenophora (Pleosporaceae), which cause leaf spot and blight disease (Luttrell 1973;White 1999;Summerell et al 2010Summerell et al , 2011Manamgoda et al 2011), Phaeosphaeria (anamorph Stagonospora), and Phaeosphaeriopsis (Phaeosphaeriaceae) which cause wheat glume blotch (Crous 2006;Vergnes et al 2006), Didymella (Didymellaceae) which cause Ascochyta blight of pea (Chilvers et al 2009) and Leptosphaeria (Leptosphaeriaceae), which cause stem canker on Brassica. In recent years, many important taxonomic studies using molecular phylogeny to examine this large and difficult group of ascomycetes (Ascomycota) have been published (Zhang et al 2008a, b;2009a, b;2012;Schoch et al 2009;Suetrong et al 2009;Tanaka et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Astrosphaeriella is polyphyletic, with species in Fissuroma gen. nov., and Neoastrosphaeriella gen. nov.

et al. 2011

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Collections of fungi from bamboo and palm plants in Thailand resulted in the identification of several species of Astrosphaeriella, including the type species A. fusispora, which is a synonym of A. stellata. Species of Astrosphaeriella have been previously circumscribed on the basis of morphology and, to a lesser extent, on host affiliation. In order to obtain a phylogenetic understanding of the genus, eleven strains of Astrosphaeriella sensu lato were sequenced in this study. Molecular analyses based on a combined dataset of 18S and 28S nrDNA sequences were carried out to infer the phylogenetic placement of these strains in the Pleosporales. The phylogenetic analyses showed that Astrosphaeriella is polyphyletic, with Astrosphaeriella species clustering in four clades, two clades, including species with slit-like ostioles, clustered in Aigialaceae; the clade that includes the generic type clustered together with Delitschia; and A. Africana, which has striate ascospores, deviated from these three clades and had a basal position in the Pleosporales. A new combination in Fissuroma gen. nov. and new genus Neoastrosphaeriella are introduced in Aigialaceae to include the species with slit-like ascomata.

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Mating Types of Phaeosphaeria nodorum (anamorph Stagonospora nodorum) from Central Asia

Cited by 12 publications

References 7 publications

Novel sources of resistance to Septoria nodorum blotch in the Vavilov wheat collection identified by genome-wide association studies

Novel sources of resistance to Septoria nodorum blotch in the Vavilov wheat collection identified by genome-wide association studies

Stagonospora nodorum: From Pathology to Genomics and Host Resistance

Astrosphaeriella is polyphyletic, with species in Fissuroma gen. nov., and Neoastrosphaeriella gen. nov.

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