QoI Resistance of <i>Plasmopara viticola</i> and <i>Erysiphe necator</i> in the Mid-Atlantic United States

Baudoin, Anton; Olaya, G.; Delmotte, François; Colcol, Jeneylyne F.; Sierotzki, Helge

doi:10.1094/php-2008-0211-02-rs

Cited by 55 publications

(49 citation statements)

References 7 publications

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“…SNP creates a recognition site of restriction endonuclease AccI that allows the characterisation of A or B isolates by Cleaved Amplified Polymorphic Sequence (CAPS) analysis (e.g. Baudoin et al 2008).…”

Section: Molecular Characterisationmentioning

confidence: 99%

Spatio-temporal distribution of Erysiphe necator genetic groups and their relationship with disease levels in vineyards

et al. 2008

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The discovery of genetically distinct Erysiphe necator groups (A or B), with high phenotypic similarities, raises important questions about their coexistence. For plant pathogens, niche partitioning, allowing the coexistence on the same host (i.e. the same resource), might result from separation in space and/or time. We used a landscape genetic approach to study the geographic distribution of genetic groups of E. necator (distinguished by a SNP in the β-tubulin gene) at the spatial scale of the Languedoc-Roussillon region (southern France) and to assess the temporal succession of groups along the course of the 2007 epidemic. Spatial distribution revealed a high heterogeneity between vineyards: from 100% B to 100% A, with 62% and 38% of vineyards showing a majority of A and B isolates, respectively. Temporal isolation seems to be the major mechanism in the coexistence of the two genetic groups: all isolates collected towards the end of the epidemic belonged to group B, whatever the initial frequency of genetic groups. Our results confirm that both A or B isolates can lead to flag-shoot symptoms, and showed that group A isolates tend to disappear during the course of the epidemic, whereas group B isolates may be active during the entire epidemic and involved in further production of cleistothecia, when recombination takes place. For the first time, the relationship between the frequency of genetic groups and disease levels on leaves and clusters at the end of the epidemic was evaluated. We showed a strong relationship between the disease severity and the genetic composition of E. necator populations: the damage was more important when the epidemic was initiated by B isolates.

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Section: Molecular Characterisationmentioning

confidence: 99%

Spatio-temporal distribution of Erysiphe necator genetic groups and their relationship with disease levels in vineyards

et al. 2008

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“…Despite various studies aimed at better prediction of infection based on climatic conditions, these control measures are still costly and impact negatively on the environment. Additionally, the emergence of fungicide resistant or insensitive strains of P. viticola (Gisi 2002;Gisi et al 2007) and E. necator (Erickson and Wilcox 1997;Savocchia et al 2004;Baudoin et al 2008;Furuya et al 2010) emphasize the importance of durable host resistance. Genetic host resistance to both these pathogens are available in various cultivars, but these cultivars are mainly derived from non-vinifera species and resistance varies from complete resistance to partial resistance (Wang et al 1995;Cadle-Davidson 2008).…”

Section: Introductionmentioning

confidence: 99%

Detection of downy and powdery mildew resistance QTL in a ‘Regent’ × ‘RedGlobe’ population

et al. 2014

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One hundred and eighty six F 1 plants from a 'Regent' 9 'RedGlobe' cross were used to generate a partial linkage map with 139 microsatellite markers spanning all 19 chromosomes. Phenotypic scores for downy mildew, taken over two years, confirmed a major resistance QTL (Rpv3) against downy mildew in the interval VVIN16-cjvh to UDV108 on chromosome 18 of 'Regent'. This locus explained up to 62 % of the phenotypic variance observed. Additionally a putative minor downy mildew resistance locus was observed on chromosome 1 in one season. A major resistance locus against powdery mildew (Ren3) was also identified on chromosome 15 of 'Regent' in the interval UDV116 to VChr15CenGen06. This study established the efficacy of and validated the 'Regent'-derived downy and powdery mildew major resistance genes/QTL under South African conditions. Closely linked SSR markers for marker-assisted selection and gene pyramiding strategies were identified.

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“…The advent of fungicide resistance has been documented in many modes of action groups in VA and surrounding states [19][20][21]. Moreover, risks of fungicide resistance development from the reliance on curative fungicide application have been discussed [11].…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

Evaluation of the Cultivar Effect on Wine Grape Fungal Diseases with a Use of a Low-Input Fungicide Regimen in Southeastern Virginia, USA

Nita¹

2016

Grape and Wine Biotechnology

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Wine grape cultivar selection was examined as a use of biotechnology and a part of integrated plant disease management in grape and wine production. The efficacy of 18 wine grape cultivars against various wine grape diseases was examined using a relatively low-input fungicide regimen to determine whether these diseases can be managed under hot and humid southeastern Virginia conditions over 5 years. Disease developments of black rot, Botrytis bunch rot, downy mildew, Phomopsis cane and leaf spot, and powdery mildew was evaluated. Although overall level of disease was low in each year, we observed a significant (P ≤ 0.05) effect of cultivar in many cases, indicating the importance of cultivar selection. Cultivars such as 'Norton', 'Noire', 'Traminette', 'Vidal blanc', and 'Viognier' were found to be less susceptible to the major diseases under Virginia environmental conditions.

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QoI Resistance of Plasmopara viticola and Erysiphe necator in the Mid-Atlantic United States

Cited by 55 publications

References 7 publications

Spatio-temporal distribution of Erysiphe necator genetic groups and their relationship with disease levels in vineyards

Spatio-temporal distribution of Erysiphe necator genetic groups and their relationship with disease levels in vineyards

Detection of downy and powdery mildew resistance QTL in a ‘Regent’ × ‘RedGlobe’ population

Evaluation of the Cultivar Effect on Wine Grape Fungal Diseases with a Use of a Low-Input Fungicide Regimen in Southeastern Virginia, USA

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