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R274 Survey of GB Late Blight Populations

Publication Date: 
16 August 2011
Author/Contact :
David Cooke

Contractor :
JHI, FERA, Sarvari Research Trust

Full Research Project Title: Survey of GB blight populations
Duration: June 2006 - May 2009

Aim: To monitor the occurrence of the A2 late blight mating type in GB.

This project builds on previous work that monitored the occurrence of the A2 mating type in GB.  The work suggested that the proportion of A2s was increasing in England. In this new project a larger number of samples, collected through the AHDB Potatoes  Fight Against Blight campaign, will be analysed to determine the proportion and distribution of A2s in GB.

High-throughput genetic analysis will be used to monitor changes in blight populations. This information, in combination with the mating type testing and visual inspection of leaves for oospores, will be used to target outbreaks thought to be derived from oospores.

The potential for oospore production, and the conditions under which germination and infection occur, will also be investigated and the potential impacts for disease control assessed.

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