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Title: STRIPE-RUST REACTION OF 28 CANADIAN WHEAT CULTIVARS

Author
item MCCALLUM, B - AG CANADA
item Chen, Xianming
item SHORTER, S - CROP & FOOD, NEW ZEALAND
item SADASIVAIAH, R - LETHBRIDGE RES CTR,CANADA
item TEWARI, J - UNIV OF ALBERTA, CANADA

Submitted to: Canadian Journal of Plant Pathology
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/2005
Publication Date: 7/1/2005
Citation: Mccallum, B.D., Chen, X., Shorter, S., Sadasivaiah, R.S., Tewari, J.P. Stripe-rust reaction of 28 canadian wheat cultivars. Canadian Journal of Plant Pathology 26:417.

Interpretive Summary:

Technical Abstract: Since 2000, wheat stripe rust caused by Puccinia striiformis Westend. has become common in the eastern Prairiers region of Western Canada. Wheat cultivars registered for production in this area have not previously been tested for their reaction to this disease. As an initial step toward controlling stripe rust in the area, 28 wheat cultivars commonly grown in western Canada were tested for their resistance. The cultivars were grown in New Zealand, British Columbia, and two locations in Washington State in 2003 and 2002 with three replicates at each location. These locations were chosen because stripe rust annually occurs naturally at these sites. Cultivars were rated for the severity of stripe rust at the heading stage and were ranked according to the relative severity. The overall rankings were similar between locations & years. The cultivar reactions ranged from moderately resistant to susceptible. Many of the cultivars with low to intermediate levels of stripe rust severity are known to carry the resistance gene Lr34 to leaf rust, which is linked to the resistance gene Yr18 to stripe rust. The predominant wheat cultivar in western Canada, 'AC Barrier', was one of the most susceptible cultivars to stripe rust.