Potato blight populations in Ireland and beyond

L.R. Cooke; K.L. Deahl

Potato blight populations in Ireland and beyond

In: Potato in progress

Authors:

L.R. Cooke

L.R. Cooke ¹Department of Applied Plant Science, Faculty of Science and Agriculture, The Queen’s University of Belfast
²Applied Plant Science Division, Department of Agriculture and Rural Development, Newforge Lane, Belfast BT9 5PX, UK

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K.L. Deahl

K.L. Deahl ³USDA, ARS, PSI, Vegetable Laboratory, Beltsville, MD 20705, USA

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Type:: Chapter

Pages:: 299–310

DOI:: https://doi.org/10.3920/978-90-8686-562-8_036

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Phytophthora infestans in Northern Ireland was studied using isolates collected mainly from commercial potato crops between 1995 and 2002. Phenotypic diversity was assessed using mating type and metalaxyl resistance; genotypic diversity was assessed using two allozyme loci (glucose-6-phosphate isomerase, Gpi, and peptidase, Pep), mitochondrial DNA haplotype and the multilocus RFLP probe RG57. Based on published data, the P. infestans population in Northern Ireland was compared with that in the Republic of Ireland. In the island of Ireland, the population appears to consist of a limited number of clones of the A1 mating type, A2 types are very infrequent, if present at all, and there is no evidence of sexual recombination. Comparisons with populations in Great Britain and mainland Europe indicate that these are more diverse than the population in Ireland. In some regions of Europe, sexual recombination may occasionally contribute to this diversity, while in others it appears to occur frequently, but it is unclear to what extent it influences the epidemiology of the pathogen. P. infestans populations in Europe are compared with those in N. America. Differences in P. infestans populations within Europe and between Europe and N. America suggest a number of questions, which will only be answered by international co-operation.

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Potato in progress

Science meets practice

E-Book ISBN:: 9789086865628

Publisher:: Wageningen Academic

Print Publication Date:: 30 Oct 2005

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

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Potato blight populations in Ireland and beyond

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Potato in progress

Science meets practice

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