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DefendR Genetic Traits

The DefendR symbol indicates above industry average levels of genetic resistance to one or more of the most important canola yield reducing factors. It represents the strength of the breeding programs of our primary canola breeding partners and a promise to canola growers that they are purchasing a variety that has exceptional yield potential and leading genetics for disease and/or harvest management.

Disease Resistance Trait Minimum Resistance Level Varieties
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A dependable level of shatter tolerance well suited to straight cutting

BY 6211TF
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Improved Tolerance (IT) to Sclerotinia Stem Rot 6074 RR
6076 CR
Multi-genic (major gene) resistance to
Blackleg, strong R rating
BY 6211TF
BY 6204TF
6090 RR
6076 CR
Stacked 1st and next-generation Clubroot resistance genes that provide broad protection against most newer pathotypes such as 3A, 2B, 3D, 8E, 5G, 5K, 3O and 5X

BY 6207TF
6076 CR

 

Pod DefendR

The pod DefendR trait means outstanding genetic resistance to pod shattering in BrettYoung canola hybrids.

The introduction of pod shatter-resistant hybrids to canola growers several years ago led to a significant increase in adoption of both direct harvesting and delayed swathing of canola crops.
BrettYoung canola growers can now enjoy this same flexibility because of our new pod shatter-resistance trait, which is non-GMO, and delivers dependable levels of shattering tolerance.

 

Sclerotinia DefendR

 

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For growers looking to reduce the impact of this disease, BrettYoung’s DefendR Sclerotinia tolerance trait is included in both the 6074 RR and 6076 CR hybrids. Screening and testing results in both these varieties have shown improved tolerance superior to susceptible checks in reaction to inoculation with Sclerotinia sclerotorium using industry-approved standardized testing protocol.

The DefendR trait in 6074 RR and 6076 CR provides Sclerotinia tolerance at levels that will

  • Reduce the impacts of infection and reduce yield loss wherever disease pressure is present.
  • Allow for greater flexibility in fungicide application timing when flowering is uneven and staggered, which otherwise makes fungicide application timing difficult.
  • Reduce the impact of Sclerotinia in long-flowering crops where the window of fungicide protection has lapsed.

Blackleg DefendR 

Blackleg is back in the spotlight as a disease that is evolving and making a strong resurgence in intensive canola production areas. Most agree that managing this disease requires a combination of rotation, crop management (including regular field scouting) and proper variety selection as important factors to reducing the impact of this disease.

The DefendR Blackleg trait means the BrettYoung canola variety is rated as a strong R for Blackleg resistance. It also means that the variety incorporates multiple major genes to defend against multiple strains of Blackleg. DefendR Blackleg varieties achieve a broader level of resistance compared to competitive R-rated varieties that have either no, or only one, major gene for Blackleg resistance.

Clubroot DefendR 

Previously considered primarily a Central Alberta issue, Clubroot has now been identified in all three Prairie provinces. In 2013, a new Clubroot pathotype was identified in Alberta as the canola varieties up to that time thought to be Clubroot resistant were showing high levels of infection. New pathotypes have since been identified in several areas.

The DefendR Clubroot trait is resistant to pathotypes 2, 3, 5, 6, 8, 3H, 3A and 5X. BrettYoung will continue to commercialize DefendR-rated Clubroot resistant genetics couplied to high yielding, high performance varieties.

Recent BY PLUS notes

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