Eyespot (Pseudocercosporella herpotrichoides) epidemiology in relation to prediction of disease severity and yield loss in winter wheat—a review

Fitt, Bruce D.L.; Goulds, A.; Polley, Romina

doi:10.1111/j.1365-3059.1988.tb02081.x

Cited by 62 publications

(52 citation statements)

References 55 publications

(59 reference statements)

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“…Winter wheats grown in areas of high rainfall and moderate winters such as northwestern Europe and the PaciWc Northwest (PNW) region of the United States are particularly vulnerable to infection. Severe infections can result in yield losses of up to 50% (Fitt et al 1988). Fungicidal controls can be used but require additional inputs and present some environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Identification of a candidate gene for the wheat endopeptidase Ep-D1 locus and two other STS markers linked to the eyespot resistance gene Pch1

et al. 2007

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Hansen, Jennifer L.; Zemetra, Robert S.; Santra, Dipak K.; Campbell, Kimberly G.; and Riera-Lizarazu, Oscar, "Identification of a candidate gene for the wheat endopeptidase Ep-D1 locus and two other STS markers linked to the eyespot resistance gene Pch1" (2008 Abstract Wheat is prone to strawbreaker foot rot (eyespot), a fungal disease caused by Oculimacula yallundae and O. acuformis. The most eVective source of genetic resistance is Pch1, a gene derived from Aegilops ventricosa. The endopeptidase isozyme marker allele Ep-D1b, linked to Pch1, has been shown to be more eVective for tracking resistance than DNA-based markers developed to date. Therefore, we sought to identify a candidate gene for Ep-D1 as a basis for a DNA-based marker. Comparative mapping suggested that the endopeptidase loci Ep-D1 (wheat), enp1 (maize), and Enp (rice) were orthologous. Since the product of the maize endopeptidase locus enp1 has been shown to exhibit biochemical properties similar to oligopeptidase B puriWed from E. coli, we reasoned that Ep-D1 may also encode an oligopeptidase B. Consistent with this hypothesis, a sequence-tagged-site (STS) marker, Xorw1, derived from an oligopeptidase B-encoding wheat expressed-sequence-tag (EST) showed complete linkage with Ep-D1 and Pch1 in a population of 254 recombinant inbred lines (RILs) derived from a cross between wheat cultivars Coda and Brundage. Two other STS markers, Xorw5 and Xorw6, and three microsatellite markers (Xwmc14, Xbarc97, and Xcfd175) were also completely linked to Pch1. On the other hand, Xwmc14, Xbarc97, and Xcfd175 showed recombination in the W7984 £ Opata85 RIL population suggesting that recombination near Pch1 is reduced in the Coda/Brundage population. In a panel of 44 wheat varieties with known eyespot reactions, Xorw1, Xorw5, and Xorw6 were 100% accurate in predicting the presence or absence of Pch1 whereas Xwmc14, Xbarc97, and Xcfd175 were less eVective. Thus, linkage mapping and a germplasm survey suggest that the STS markers identiWed here should be useful for indirect selection of Pch1.

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Section: Introductionmentioning

confidence: 99%

Identification of a candidate gene for the wheat endopeptidase Ep-D1 locus and two other STS markers linked to the eyespot resistance gene Pch1

et al. 2007

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“…The sensitivity of R-type strains to triazole fungicides is low (Leroux & Gredt, 1988). Resistance to benzimidazole fungicides is generally more frequent among R-type than W-type strains (King & Griffin, 1985;Maraite et al, 1985;Fitt et al, 1988). This can, to some extent, explain the population shift towards the R-type observed since the early eighties (Hollins & Scott, 1987).…”

Section: Introductionmentioning

confidence: 79%

“…Pseudocercosporella herpotrichoides (Fron) Deighton causes eyespot, a widespread disease of wheat, barley and rye in temperate areas (reviewed by Fitt et al, 1988). It is an important component of the parasitic complex of cereal stem-base rot in association with Rhizoctonia spp.…”

Section: Introductionmentioning

confidence: 99%

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Identification of rye- and wheat-types of Pseudocercosporella herpotrichoides with DNA probes

Thomas

Maraite

Boutry³

1992

Journal of General Microbiology

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A partial genomic library of the plant-pathogenic fungus Pseudocercosporeffa herpotrichoides was prepared in a bacterial plasmid vector. Plasmids from 20 random recombinant clones were radioactively labelled and used as probes in Southern blot experiments with genomic DNA isolated from seven isolates belonging to the rye-type and four isolates of the wheat-type of P. herpotrichoides. Most of the probes tested revealed polymorphisms between the two types. In addition, some of them distinguished different isolates within each type. One probe that gave strong hybridization signals may correspond with repetitive DNA sequences. It was shown by dot-blot hybridization to be specific to all the wheat-type isolates tested.

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“…Eyespot causes characteristic eye-shaped lesions on the lower portion of the stem, which are clearly visible at BBCH 30-32 (Biologische Bundesanstalt, Bundessortenamt und CHemische Industrie -scale of phenological development stages of plants) (Korbas 2004). Severe eyespot lesions can weaken stem bases and cause them to bend or break, which could result in yield losses of up to 50% (Fitt et al 1988;Janczewska 1991;Murray 2010). Eyespot also results in reduced tiller number, kernel number per head, and 1000-kernel weight (Scott and Hollins 1974;Murray and Bruehl 1983).…”

Section: Introductionmentioning

confidence: 99%

Using markers and field evaluation to identify the source of eyespot resistance genePch1in the collection of wheat breeding lines

Kwiatek

Wiśniewska

Kaczmarek

et al. 2015

Cereal Research Communications

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Pch1 gene translocated from Aegilops ventricosa provides effective resistance to eyespot in wheat. To track the Pch1 gene introgression, we investigated 372 genotypes obtained from various breeding programs using endopeptidase EpD1b marker, sequence-tagged-site (STS) marker XustSSR2001-7DL, and the score of infection index (K-index) evaluated after in vivo inoculation test. These genotypes were divided into three groups with 136, 124 and 112 genotypes for the field test lasting three years. In 2011, the mean K-index was 0.81, while 2012 and 2013 the mean K-indexes were 1.60 and 1.46, respectively. Both marker results indicated that 18 genotypes possessed Pch1 gene. Statistical analysis of the level of K-index showed that these 18 genotypes were resistant to eyespot, which verified the proper assignment of wheat genotypes with Pch1 gene based on the marker data. Thus, the endopeptidase and XustSSR2001-7DL are useful for identifying sources of eyespot resistance gene Pch1 in wheat breeding program.

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Eyespot (Pseudocercosporella herpotrichoides) epidemiology in relation to prediction of disease severity and yield loss in winter wheat—a review

Cited by 62 publications

References 55 publications

Identification of a candidate gene for the wheat endopeptidase Ep-D1 locus and two other STS markers linked to the eyespot resistance gene Pch1

Identification of a candidate gene for the wheat endopeptidase Ep-D1 locus and two other STS markers linked to the eyespot resistance gene Pch1

Identification of rye- and wheat-types of Pseudocercosporella herpotrichoides with DNA probes

Using markers and field evaluation to identify the source of eyespot resistance genePch1in the collection of wheat breeding lines

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