Identification of powdery mildew resistance QTL in strawberry (Fragaria × ananassa)

Publication Overview
TitleIdentification of powdery mildew resistance QTL in strawberry (Fragaria × ananassa)
AuthorsCockerton HM, Vickerstaff RJ, Karlström A, Wilson F, Sobczyk M, He JQ, Sargent DJ, Passey AJ, McLeary KJ, Pakozdi K, Harrison N, Lumbreras-Martinez M, Antanaviciute L, Simpson DW, Harrison RJ
TypeJournal Article
Journal NameTheoretical and Applied Genetics
Year2018
CitationCockerton HM, Vickerstaff RJ, Karlström A, Wilson F, Sobczyk M, He JQ, Sargent DJ, Passey AJ, McLeary KJ, Pakozdi K, Harrison N, Lumbreras-Martinez M, Antanaviciute L, Simpson DW, Harrison RJ. Identification of powdery mildew resistance QTL in strawberry (Fragaria × ananassa). Theoretical and Applied Genetics. 2018. 131(9):1995-2007.

Abstract

Key Message Powdery mildew resistance in two strawberry mapping populations is controlled by both stable and transient novel QTL of moderate effect. Some low transferability of QTL across wider germplasm was observed. The obligate biotrophic fungus Podosphaera aphanis is the causative agent of powdery mildew on cultivated strawberry (Fragaria × ananassa). Genotypes from two bi-parental mapping populations 'Emily' × 'Fenella' and 'Redgauntlet' × 'Hapil' were phenotyped for powdery mildew disease severity in a series of field trials. Here, we report multiple QTL associated with resistance to powdery mildew, identified in ten phenotyping events conducted across different years and locations. Six QTL show a level of stable resistance across multiple phenotyping events; however, many other QTL were represented in a single phenotyping event and therefore must be considered transient. Subsequent screening of identified QTL across a validation set determined whether identified QTL remained closely linked to the associated resistance gene in the wider germplasm. Furthermore, a preliminary association analysis identified a novel conserved locus for further investigation. Our data suggest that resistance is highly complex and that multiple, primarily additive, sources of quantitative resistance to powdery mildew exist across strawberry germplasm. Utilisation of the reported markers in marker-assisted breeding or genomic selection would lead to improved powdery mildew-resistant strawberry cultivars, particularly where the studied parents, progeny and close pedigree material are included in breeding germplasm.

Features
This publication contains information about 12 features:
Feature NameUniquenameType
resistance to powdery mildewqPMR.ExF/RxH-LG1C.EmilyQTL
resistance to powdery mildewqPMR.ExF/RxH-LG2A.HapilQTL
resistance to powdery mildewqPMR.ExF/RxH-LG3A.FenellaQTL
resistance to powdery mildewqPMR.ExF/RxH-LG4B.RedgauntletQTL
resistance to powdery mildewqPMR.ExF/RxH-LG5B.FenellaQTL
resistance to powdery mildewqPMR.ExF/RxH-LG2C.EmilyQTL
resistance to powdery mildewqPMR.ExF/RxH-LG6D.FenellaQTL
resistance to powdery mildewqPMR.ExF/RxH-LG6C.ValidationQTL
resistance to powdery mildewqPMR.ExF/RxH-LG7D.HapilQTL
resistance to powdery mildewqPMR.ExF/RxH-LG7C.RedgauntletQTL
resistance to powdery mildewqPMR.ExF/RxH-LG7D.EmilyQTL
resistance to powdery mildewqPMR.ExF/RxH-LG6D.RedgauntletQTL
Projects
This publication contains information about 1 projects:
Project NameDescription
Strawberry-Powdery_mildew_resistance-Cockerton-2018
Stocks
This publication contains information about 2 stocks:
Stock NameUniquenameType
Emily_x_Fenella-F1Emily_x_Fenella-F1population
Redgauntlet_x_Hapil-F1Redgauntlet_x_Hapil-F1population