The genetics of exapted resistance to two exotic pathogens in pedunculate oak
BARTHOLOME, Jérôme
Biodiversité, Gènes & Communautés [BioGeCo]
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
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Biodiversité, Gènes & Communautés [BioGeCo]
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
BARTHOLOME, Jérôme
Biodiversité, Gènes & Communautés [BioGeCo]
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
Biodiversité, Gènes & Communautés [BioGeCo]
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
MOUGOU, Amira
Biodiversité, Gènes & Communautés [BioGeCo]
Institut National Agronomique de Tunisie [INAT]
< Reduce
Biodiversité, Gènes & Communautés [BioGeCo]
Institut National Agronomique de Tunisie [INAT]
Language
en
Article de revue
This item was published in
New Phytologist. 2019, vol. online first, p. 1-16
Wiley
English Abstract
Exotic pathogens cause severe damage in natural populations in the absence of coevolutionary dynamics with their hosts. However, some resistance to such pathogens may occur in naive populations. The objective of this study ...Read more >
Exotic pathogens cause severe damage in natural populations in the absence of coevolutionary dynamics with their hosts. However, some resistance to such pathogens may occur in naive populations. The objective of this study was to investigate the genetics of this so-called 'exapted' resistance to two pathogens of Asian origin (Erysiphe alphitoides and Phytophthora cinnamomi) in European oak. Host-pathogen compatibility was assessed by recording infection success and pathogen growth in a full-sib family of Quercus robur under controlled and natural conditions. Two high-resolution genetic maps anchored on the reference genome were used to study the genetic architecture of resistance and to identify positional candidate genes. Two genomic regions, each containing six strong and stable quantitative trait loci (QTLs) accounting for 12-19% of the phenotypic variation, were mainly associated with E. alphitoides infection. Candidate genes, especially genes encoding receptor-like-kinases and galactinol synthases, were identified in these regions. The three QTLs associated with P. cinnamomi infection did not colocate with QTLs found for E. alphitoides. These findings provide evidence that exapted resistance to E. alphitoides and P. cinnamomi is present in Q. robur and suggest that the underlying molecular mechanisms involve genes encoding proteins with extracellular signaling functions.Read less <
Keywords
Quercus robur
quantitative trait loci (QTL)
English Keywords
Erysiphe alphitoides
Phytophthora cinnamomi
disease resistance
exapted resistance
powdery mildew
receptor-like kinase
Origin
Hal imported