Co-inoculated Plasmopara viticola genotypes compete for the infection of the host independently from the aggressiveness components
OPEN ACCESS
Loading...
Author / Producer
Date
2013-06
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
During Plasmopara viticola epidemics only few genotypes produce most of the secondary lesions and dominate in the population. Selection of dominant genotypes is hypothesized to be linked to environmental conditions and can occur rapidly, particularly if there is also difference between genotypes in terms of fitness and aggressiveness. Measurements of aggressiveness components can largely determine the rate of epidemic development, although the components of aggressiveness do not take into account potential direct competition between genotypes. Differences in aggressiveness have been also reported to be greater under non-optimal conditions suggesting for genotype adaptation to different conditions. To evaluate differences in latency at non-optimal conditions, we characterized genotypes deriving from different climatic regions at three different temperatures (15, 25 and 35 °C) and we found no differences. To investigate whether other factors may impact on competition between P. viticola genotypes, we evaluated polycyclic infections of P. viticola by co-inoculating three genotypes with similar aggressiveness components in two different co-inoculation experiments and an increasing prevalence of one of the two genotypes was observed. Competition was not related to the origin of the genotype and we hypothesize that competitive selection is modulated by differences in the secretion of effector molecules which can contribute to the establishment of dominant genotypes over an epidemic season.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
136 (2)
Pages / Article No.
363 - 371
Publisher
Springer
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Fitness index; Competitive SSR amplification; Effectors; Plasmopara viticola
Organisational unit
03516 - McDonald, Bruce (emeritus) / McDonald, Bruce (emeritus)
Notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher