Stripe rust reaction of 28 Canadian wheat cultivars<sup>1</sup>

McCallum, Brent D.; Chen, X.; Shorter, S. C.; Sadasivaiah, R. S.; Tewari, J. P.

doi:10.1080/07060660709507486

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…Cultivars with Lr34, like Glenlea and Laura, have maintained at least a moderate level of resistance over many years of production in Canada. However, cultivars without Lr34 such as AC Barrie and Superb were resistant when released, due to race-specific resistance genes, but became susceptible over time due to changes in the pathogen population (McCallum et al 2007a). This type of ''resistance breakdown'' has not happened to Canadian cultivars with Lr34.…”

Section: Discussionmentioning

confidence: 98%

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Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

et al. 2011

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Section: Discussionmentioning

confidence: 98%

“…Resistance gene Lr34 works in combination with other genes such as Lr10, Lr13, Lr14a, Lr16, Lr21 and Lr22a to condition resistance in Canadian wheat cultivars (McCallum et al 2007a). There is a synergistic effect of Lr34 on other leaf rust resistance genes when it is used in combinations of two or more genes (German and Kolmer 1992).…”

Section: Discussionmentioning

confidence: 98%

Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

et al. 2011

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“…Leaf rust caused by P. triticina is the second important disease in western Canada. Leaf rust resistance genes such as Lr1 , Lr10 , Lr13 , Lr14a , Lr16 , Lr21 , Lr22a , and Lr34 are effective against leaf rust races in Canada (McCallum et al, 2007a). These genes are present in some leaf rust resistant cultivars such as McKenzie, Lovitt, CDC Alsask, 5500HR, and 5600HR (Hiebert et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

Genetic Improvement in Grain Yield and other Traits of Wheat Grown in Western Canada

et al. 2016

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Breeding efforts have been important in addressing the challenges of wheat production in western Canada. We studied the effect of breeding on grain yield and other important traits of 100 wheat cultivars released in Canada from 1885 to 2012. The cultivars were grown in seven environments during 2011 to 2013. Grain yield was positively correlated with days to maturity and kernel weight but negatively correlated with plant height, lodging, and grain protein content. Results indicate that grain yield increased at a rate of 0.28% year–1 in 62 cultivars of Canada western red spring (CWRS) class, 1.2% year–1 in 9 cultivars of Canada prairie spring (CPS) class, but not in 14 studied cultivars of Canada western amber durum (CWAD) class due to breeding efforts. Grain protein content exhibited an increasing trend in cultivars of CWRS (0.05% year–1) and CPS (0.79% year–1) classes, and a decreasing trend in those of CWAD (0.23% year–1). Days to maturity decreased in CWRS (0.02% year‐1) and CWAD (0.09% year‐1) classes but remained unchanged in CPS class. Plant height exhibited a gradual decline in cultivars of CWRS (0.16% year–1) and CWAD class (0.44% year–1), but an increase in those of CPS class (0.50% year–1). Test weights showed an increasing trend in CWRS (0.04% year–1) and CPS (0.17% year–1) classes but not in CWAD class. Grain weight also increased over time in CWRS (0.06% year–1) and in CPS (0.41% year–1), but not in CWAD class. These results suggest that breeding efforts have improved yield, quality and other attributes in wheat cultivars of different Canadian wheat classes over the last 100 years.

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“…Analysis of variance was conducted using the Proc Mixed option using SAS (SAS Institute, Inc., Cary, NC) whereby each location )year was considered a random variable. Based on the reactions of McCallum et al (2007a), the following rating scale was based on percent severity averaged over years and locations: Highly Resistant, 0 to 1%; Resistant, 2 to 5%; Moderately Resistant 6 to 10%; Intermediate 11 to 15%; Moderately Susceptible, 16 to 20%; Susceptible 21 to 40%; and Highly Susceptible 40%.…”

Section: Materials and Methods Disease Evaluationmentioning

confidence: 99%

“…Adult plant resistance is more durable than seedling resistance (Chen 2005) although some known APR resistance genes are race-specific and have been overcome by new virulent races of stripe rust (Johnson 1992). Among spring wheat varieties in western Canada, those carrying Yr18 possess APR resistance to stripe rust; this gene is the same as Lr34 that also provides adult plant resistance to leaf rust caused by P. triticina Eriks (German and Kolmer 1992;McCallum et al 2007a, b;Dakouri et al 2010;McCallum et al 2012) particularly when used in combination with other effective genes (German and Kolmer 1992). The same gene also conditions adult plant resistance to powdery mildew and is known as Pm38 (Lagudah et al 2009).…”

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confidence: 99%

Stripe rust resistance among western Canadian spring wheat and triticale varieties

et al. 2012

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Randhawa, H., Puchalski, B. J., Frick, M., Goyal, A., Despins, T., Graf, R. J., Laroche, A. and Gaudet, D. A. 2012. Stripe rust resistance among western Canadian spring wheat and triticale varieties. Can. J. Plant Sci. 92: 713–722. Stripe rust (Puccinia striiformis Westend.) is an important pathogen of wheat in western Canada and worldwide. One hundred and four spring wheat and triticale varieties and cultivars were evaluated for resistance to stripe rust in nurseries at Lethbridge and Creston, BC, during 2009 and 2010. In the Canada Prairie Spring Red (CPSR) wheat class, newer varieties were more resistant compared with many of the older varieties. Among the white Canada Prairie Spring White (CPSW) wheats, Vista was moderately resistant, whereas Snowhite475 and Snowhite476 were susceptible. Little useful resistance was observed within the Canada Western Hard White Spring (CWHWS) class. Sixty percent of the Canada Western Red Spring (CWRS) wheats, including the currently popular varieties Lillian, Harvest and Kane, were resistant. Susceptible CWRS varieties that are extensively seeded in western Canada include AC Barrie, Superb and McKenzie, but also include the recently registered CDC Kernen and Vesper. The varieties were tested for the presence of the stripe rust genes Yr10, Yr17, Yr18 and Yr36 using molecular markers. Much of the stripe rust resistance, particularly in the CWRS, Canada Western Extra Strong (CWES), and CPSR wheat classes was attributed to the presence of adult plant resistance gene Yr18. Yr17 and Yr36 were also detected among CWRS and CWES varieties. However, the absence of markers for known genes in several resistant varieties indicated that uncharacterized genes for stripe rust occur among hexaploid wheats. Durum wheat and triticale varieties were universally resistant with the absence of tested markers. Therefore, there appear to be numerous sources of stripe rust resistance, both characterized and uncharacterized, among western Canadian spring wheat and triticale varieties.

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Stripe rust reaction of 28 Canadian wheat cultivars¹

Abstract: Wheat stripe rust (

Cited by 14 publications

References 20 publications

Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

Genetic Improvement in Grain Yield and other Traits of Wheat Grown in Western Canada

Stripe rust resistance among western Canadian spring wheat and triticale varieties

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Stripe rust reaction of 28 Canadian wheat cultivars1

Abstract: Wheat stripe rust (

Cited by 14 publications

References 20 publications

Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

Allelic variation for the rust resistance gene Lr34/Yr18 in Canadian wheat cultivars

Genetic Improvement in Grain Yield and other Traits of Wheat Grown in Western Canada

Stripe rust resistance among western Canadian spring wheat and triticale varieties

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Stripe rust reaction of 28 Canadian wheat cultivars¹