Examining Phenotypic Traits Contributing to the Spread in Northern European Potato Crops of EU_41_A2, a New Clonal Lineage of Phytophthora infestans

TY - JOUR

T1 - Examining Phenotypic Traits Contributing to the Spread in Northern European Potato Crops of EU_41_A2, a New Clonal Lineage of Phytophthora infestans

AU - Puidet, Britt

AU - Mabon, Roman

AU - Guibert, Michele

AU - Kiiker, Riinu

AU - Soonvald, Liina

AU - Hong Le, Vinh

AU - Eikemo, Håvard

AU - Dewaegeneire, Pauline

AU - Saubeau, Guillaume

AU - Chatot, Catherine

AU - Aurousseau, Frédérique

AU - Cooke, David E.L.

AU - Lees, Alison

AU - Abuley, Isaac Kwesi

AU - Hansen, Jens Grønbech

AU - Corbiere, Roselyne

AU - Leclerc, Melen

AU - Andrivon, Didier

PY - 2022/2

Y1 - 2022/2

N2 - Until recently, genotypes of Phytophthora infestans were regionally distributed in Europe, with populations in western Europe being dominated by clonal lineages and those in northern Europe being genetically diverse due to frequent sexual reproduction. However, since 2013, a new clonal lineage (EU_41_A2) has successfully established itself and expanded in the sexually recombining P. infestans populations of northern Europe. The objective of this study was to study phenotypic traits of the new clonal lineage of P. infestans, which may explain its successful establishment and expansion within sexually recombining populations. Fungicide sensitivity, aggressiveness and virulence profiles of isolates of EU_41_A2 were analyzed and compared to those of the local sexual populations from Denmark, Norway, and Estonia. None of the phenotypic data obtained from the isolates collected from Denmark, Estonia and Norway independently explained the invasive success of EU_41_A2 within sexual Nordic populations. Therefore, we hypothesize that the expansion of this new genotype could result from a combination of fitness traits and more favorable environmental conditions that have emerged due to climate change.

AB - Until recently, genotypes of Phytophthora infestans were regionally distributed in Europe, with populations in western Europe being dominated by clonal lineages and those in northern Europe being genetically diverse due to frequent sexual reproduction. However, since 2013, a new clonal lineage (EU_41_A2) has successfully established itself and expanded in the sexually recombining P. infestans populations of northern Europe. The objective of this study was to study phenotypic traits of the new clonal lineage of P. infestans, which may explain its successful establishment and expansion within sexually recombining populations. Fungicide sensitivity, aggressiveness and virulence profiles of isolates of EU_41_A2 were analyzed and compared to those of the local sexual populations from Denmark, Norway, and Estonia. None of the phenotypic data obtained from the isolates collected from Denmark, Estonia and Norway independently explained the invasive success of EU_41_A2 within sexual Nordic populations. Therefore, we hypothesize that the expansion of this new genotype could result from a combination of fitness traits and more favorable environmental conditions that have emerged due to climate change.

KW - Solanum tuberosum

KW - clonal lineage

KW - fungal pathogens

KW - late blight

KW - oomycetes

KW - phenotype

KW - sexual reproduction

U2 - 10.1094/PHYTO-12-20-0542-R

DO - 10.1094/PHYTO-12-20-0542-R

M3 - Journal article

C2 - 34080915

SN - 0031-949X

VL - 112

SP - 414

EP - 421

JO - Phytopathology

JF - Phytopathology

IS - 2

ER -