Evidence for selection pressure from resistant potato genotypes but not from fungicide application within a clonal Phytophthora infestans population

J.S. Stellingwerf, S. Phelan, F.M. Doohan, V. Ortiz, D. Griffin, A. Bourke, R.C.B. Hutten, D.E.L. Cooke, S. Kildea, E. Mullins*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Insight into pathogen population dynamics provides a key input for effective disease management of the potato late blight pathogen Phytophthora infestans. Phytophthora infestans populations vary from genetically complex to more simple with a few clonal lineages. The presence or absence of certain strains of P. infestans may impact the efficacy of fungicides or host resistance. Current evidence indicates that genetically, the Irish populations of P. infestans are relatively simple with a few clonal lineages. In this study, P. infestans populations were genetically characterized based on samples collected at the national centre for potato breeding during the period 2012-16. The dominance of clonal lineages within this P. infestans population was confirmed and the potential selection pressure of fungicide treatment (2013-15) and host resistance (2016) on this clonal P. infestans population was then investigated. It was found that fungicide products did not notably affect the genetic structure of sampled populations relative to samples from untreated control plants. In contrast, samples taken from several resistant potato genotypes were found to be more often of the EU_13_A2 lineage than those taken from control King Edward plants or potato genotypes with low resistance ratings. Resistant potato varieties Sarpo Mira and Bionica, containing characterized R genes, were found to strongly select for EU_13_A2 strains.
Original languageEnglish
Pages (from-to)1528-1538
JournalPlant Pathology
Volume67
Issue number7
Early online date1 Jan 2018
DOIs
Publication statusPublished - Sep 2018

Fingerprint

Phytophthora infestans
Solanum tuberosum
pesticide application
Genotype
potatoes
Pressure
genotype
Population
fungicides
varespladib methyl
vpr Genes
Genetic Structures
Population Dynamics
Disease Management
selection pressure
pathogens
Breeding
sampling
dominance (genetics)
disease control

Keywords

  • Host resistance
  • Phytophthora infestans
  • Population genetics
  • Potato
  • SSR genotyping

Cite this

Stellingwerf, J.S. ; Phelan, S. ; Doohan, F.M. ; Ortiz, V. ; Griffin, D. ; Bourke, A. ; Hutten, R.C.B. ; Cooke, D.E.L. ; Kildea, S. ; Mullins, E. / Evidence for selection pressure from resistant potato genotypes but not from fungicide application within a clonal Phytophthora infestans population. In: Plant Pathology. 2018 ; Vol. 67, No. 7. pp. 1528-1538.
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abstract = "Insight into pathogen population dynamics provides a key input for effective disease management of the potato late blight pathogen Phytophthora infestans. Phytophthora infestans populations vary from genetically complex to more simple with a few clonal lineages. The presence or absence of certain strains of P. infestans may impact the efficacy of fungicides or host resistance. Current evidence indicates that genetically, the Irish populations of P. infestans are relatively simple with a few clonal lineages. In this study, P. infestans populations were genetically characterized based on samples collected at the national centre for potato breeding during the period 2012-16. The dominance of clonal lineages within this P. infestans population was confirmed and the potential selection pressure of fungicide treatment (2013-15) and host resistance (2016) on this clonal P. infestans population was then investigated. It was found that fungicide products did not notably affect the genetic structure of sampled populations relative to samples from untreated control plants. In contrast, samples taken from several resistant potato genotypes were found to be more often of the EU_13_A2 lineage than those taken from control King Edward plants or potato genotypes with low resistance ratings. Resistant potato varieties Sarpo Mira and Bionica, containing characterized R genes, were found to strongly select for EU_13_A2 strains.",
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Stellingwerf, JS, Phelan, S, Doohan, FM, Ortiz, V, Griffin, D, Bourke, A, Hutten, RCB, Cooke, DEL, Kildea, S & Mullins, E 2018, 'Evidence for selection pressure from resistant potato genotypes but not from fungicide application within a clonal Phytophthora infestans population', Plant Pathology, vol. 67, no. 7, pp. 1528-1538. https://doi.org/10.1111/ppa.12852

Evidence for selection pressure from resistant potato genotypes but not from fungicide application within a clonal Phytophthora infestans population. / Stellingwerf, J.S.; Phelan, S.; Doohan, F.M.; Ortiz, V.; Griffin, D.; Bourke, A.; Hutten, R.C.B.; Cooke, D.E.L.; Kildea, S.; Mullins, E.

In: Plant Pathology, Vol. 67, No. 7, 09.2018, p. 1528-1538.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Evidence for selection pressure from resistant potato genotypes but not from fungicide application within a clonal Phytophthora infestans population

AU - Stellingwerf, J.S.

AU - Phelan, S.

AU - Doohan, F.M.

AU - Ortiz, V.

AU - Griffin, D.

AU - Bourke, A.

AU - Hutten, R.C.B.

AU - Cooke, D.E.L.

AU - Kildea, S.

AU - Mullins, E.

PY - 2018/9

Y1 - 2018/9

N2 - Insight into pathogen population dynamics provides a key input for effective disease management of the potato late blight pathogen Phytophthora infestans. Phytophthora infestans populations vary from genetically complex to more simple with a few clonal lineages. The presence or absence of certain strains of P. infestans may impact the efficacy of fungicides or host resistance. Current evidence indicates that genetically, the Irish populations of P. infestans are relatively simple with a few clonal lineages. In this study, P. infestans populations were genetically characterized based on samples collected at the national centre for potato breeding during the period 2012-16. The dominance of clonal lineages within this P. infestans population was confirmed and the potential selection pressure of fungicide treatment (2013-15) and host resistance (2016) on this clonal P. infestans population was then investigated. It was found that fungicide products did not notably affect the genetic structure of sampled populations relative to samples from untreated control plants. In contrast, samples taken from several resistant potato genotypes were found to be more often of the EU_13_A2 lineage than those taken from control King Edward plants or potato genotypes with low resistance ratings. Resistant potato varieties Sarpo Mira and Bionica, containing characterized R genes, were found to strongly select for EU_13_A2 strains.

AB - Insight into pathogen population dynamics provides a key input for effective disease management of the potato late blight pathogen Phytophthora infestans. Phytophthora infestans populations vary from genetically complex to more simple with a few clonal lineages. The presence or absence of certain strains of P. infestans may impact the efficacy of fungicides or host resistance. Current evidence indicates that genetically, the Irish populations of P. infestans are relatively simple with a few clonal lineages. In this study, P. infestans populations were genetically characterized based on samples collected at the national centre for potato breeding during the period 2012-16. The dominance of clonal lineages within this P. infestans population was confirmed and the potential selection pressure of fungicide treatment (2013-15) and host resistance (2016) on this clonal P. infestans population was then investigated. It was found that fungicide products did not notably affect the genetic structure of sampled populations relative to samples from untreated control plants. In contrast, samples taken from several resistant potato genotypes were found to be more often of the EU_13_A2 lineage than those taken from control King Edward plants or potato genotypes with low resistance ratings. Resistant potato varieties Sarpo Mira and Bionica, containing characterized R genes, were found to strongly select for EU_13_A2 strains.

KW - Host resistance

KW - Phytophthora infestans

KW - Population genetics

KW - Potato

KW - SSR genotyping

U2 - 10.1111/ppa.12852

DO - 10.1111/ppa.12852

M3 - Article

VL - 67

SP - 1528

EP - 1538

JO - Plant Pathology

JF - Plant Pathology

SN - 0032-0862

IS - 7

ER -