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Abstract Detail



Host/Plant Pathogen Interactions and Plant Health Management

Zhou, Qixing [1], Chang, Kanfa [1], Hwang, Sheaufang [1], Strelkov, Stephen. E. [2], Conner, Robert L. [3], McLaren, Debra L. [4], Yang, Yalong [5], Harding, Michael [6], Turnbull, George D. [1].

Genetic diversity and aggressiveness of Fusarium spp. isolated from soybean in Alberta, Canada.

Soybean (Glycine max (L.) Merr.) has great potential as an alternative crop to canola in southern Alberta farming systems. However, soybeans are susceptible to Fusarium root rot, which usually results in plant mortality in mid to late summer, and causes severe yield reductions in the crop. A total of 102 isolates identified as Fusarium spp. were recovered from diseased soybean root samples collected from central and southern Alberta from 2011 to 2013. Ten species of Fusarium were identified, with F. acuminatum as the predominant species (32 of 102 isolates), followed by F. equiseti (17 isolates), F. culmorum (14 isolates), F. avenaceum (11 isolates), F. oxysporum (9 isolates), F. redolens (8 isolates), F. torulosum (5 isolates), F. tricinctum (3 isolates), F. commune (2 isolates) and F. proliferatum (1 isolate). This is the first report of F. commune K. Skovgaard, O'Donnell et Nirenberg causing root rot in soybean in Canada. Phylogenetic analyses based on the translation elongation factor 1-α (EF-1α) and the internal transcribed spacer (ITS) sequence data were used to evaluate genetic diversity, and also used for Fusarium species identification in combination with morphological characters. Greenhouse pathogenicity tests showed that all of the isolates were pathogenic on soybean.


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1 - Crop Diversification Centre North, Alberta Agriculture and Rural Development, 17507 Fort Road NW, Edmonton, Alberta, T5Y6H3, Canada
2 - University of Alberta, Department of Agricultural, Food and Nutritional Science, 116 St. and 85 Ave., Edmonton, Alberta, T6G 2R3, Canada
3 - Cereal Research Centre, Agriculture and Agri-Food Canada, 101 Route 100, Unit 100, Morden, Manitoba, R6M1Y5, Canada
4 - Brandon Research Centre, Agriculture and Agri-Food Canada, 2701 Grand Valley Road, Brandon, Manitoba, R7A5Y3, Canada
5 - University of Alberta, Department of Agricultural, Food and Nutritional Science, 116 St. and 85 Ave., Edmonton, Alberta, T6G2R3, Canada
6 - Crop Diversification Centre South, Alberta Agriculture and Rural Development, 301 Horticultural Station Road East, Brooks, Alberta, T1R1E6, Canada

Keywords:
Fusarium
root rot
ITS
EF-1a
Soybean.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PPA042
Abstract ID:765
Candidate for Awards:None


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