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Permanent link (DOI): https://doi.org/10.7939/R35025

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Occurrence and Diversity of Peronospora viciae f. sp. pisi in Alberta, Canada Open Access

Descriptions

Other title
Subject/Keyword
Pea downy mildew
Diversity
Alberta
Peronospora viciae
Pathotype
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Liu, Jianfeng
Supervisor and department
Kan-Fa, Chang (Crop Diversification Centre-North, Alberta Agriculture and Rural Development)
Stephen, Strelkov (Agricultural, Food and Nutritional Science)
Examining committee member and department
Jocelyn, Ozga (Agricultural, Food and Nutritional Science)
Michael, Deyholos (Biological Sciences)
Department
Department of Agricultural, Food and Nutritional Science
Specialization

Date accepted
2011-09-16T18:35:37Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
Downy mildew, caused by Peronospora viciae, is an important disease of field pea. Surveys of pea crops in central Alberta in 2009 and 2010 revealed that the incidence of downy mildew is high in this region, with yield losses of 20 to 25% in the most severely infected crop. Four pathotypes of P. viciae were identified when nine pathogen isolates from central Alberta were tested on a host differential set, with pathotype ABP1 found to be predominant. Random amplified polymorphic marker analysis also revealed the possibility of frequent sexual reproduction among P. viciae populations. A total of 81 pea cultivars and lines were assessed for downy mildew resistance under field conditions in 2008 and 2009, with 10 genotypes developing little or no disease. These results suggest that the deployment of cultivars with at least partial resistance may be an effective strategy for the management of downy mildew in Alberta.
Language
English
DOI
doi:10.7939/R35025
Rights
License granted by Jianfeng Liu (jliu7@ualberta.ca) on 2011-09-11T17:26:55Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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