THIS ANNUAL PUBLICATION provides information on cereal and oilseed variety performance in Alberta and northeastern British Columbia. Important agronomic characteristics and disease resistance information is provided for varieties of wheat, barley, oat, rye, triticale, and flax. The Alberta Regional Variety Testing program for cereals and flax is coordinated by the Alberta Regional Variety Advisory Committee (ARVAC) and Alberta Agriculture and Forestry (AAF). Funding for the program 2020 program was provided by:
• Alberta Agriculture and Forestry
• Alberta Wheat Commission
• Alberta Barley Commission
• Alberta Oat Growers Association
• Alberta Seed Growers
• Alberta Seed Processors
• Prairie Oat Growers Association
• Entry fees for the varieties being tested
Data for this publication come from various sources, including:
• Alberta Agriculture and Forestry
• Agriculture and Agri-Food Canada
• British Columbia Grain Producers
• Nutrien Ag Solutions
• University of Alberta
• Alberta Innovates Technology Futures
• Farming Smarter
• SARDA Ag Research
• Battle River Research Group (BRRG)
• Chinook Applied Research Association (CARA)
• Gateway Research Organization (GRO)
• Lakeland Applied Research Association (LARA)
• Northern Peace Applied Research Association (NPARA)
• Prairie Grain Development Committee
• Lakeland College
The following individuals are the 2020 Regional Variety Trial and crop specific coordinators:
• Regional Variety Trial Coordinator: A. Fedko
• Spring wheat: H. Randhawa, D. Spaner and S. Strydhorst
• Barley: J. Anderson
• Oat: K. Nilsen
• Triticale: M. Aljarrah
• Winter Wheat: R. Graf
• Fall Rye: R. Ragupathy
• Flax: B. Tar’an
Sincere thanks are extended to all individuals and organizations who contribute to this publication.
Varieties Reported in the Tables
A variety must be registered to appear in the tables. Publication normally occurs after two years of testing — however, entries are accepted with the understanding that testing will occur for at least three years. When there is limited data for a new variety, yield information may only appear in the Overall Yield column. An “XX” is reported in any column when there is insufficient data. Single year data will not be reported as it is often an unreliable indicator of performance.
Varieties without pedigreed seed production in Alberta within the past two years, following five years of full registration to facilitate adoption, will be flagged for removal from the tables. After the variety has been flagged for removal for one year, it may be removed from the tables unless an objection is received for consideration by ARVAC. Notwithstanding the above criteria, a variety can be retained in a table if a compelling case is made. In cases where both the breeding institution and seed distributor wish to have a variety deleted from the table, removal can occur without a notification flag. Please note that under normal circumstances, removal from a table does not indicate variety cancellation has occurred.
Yield Results and Reporting
Variety choice should never be based solely on yield performance, as it is only one factor which affects net return. The genetic yield potential of a variety is often masked by numerous factors, some of which can be controlled through variety choice and others through astute agronomic management. Producers are encouraged to consider other characteristics such as maturity, plant height, lodging and disease/pest resistance when deciding which varieties to grow. Long term satisfaction with a variety is often related to non-yield characteristics.
In 2018 and 2019, the yield data for CWRS wheat were reported in two formats. In 2020 and 2021, only the traditional format has been presented. ARVAC hopes to reevaluate alternative report formats in the future, when in-person discussions can occur.
Producers have asked for additional checks in the regional variety trials that reflect more commonly grown varieties. Starting in 2018, two additional varieties were grown as “benchmark” checks and reflect the two most popular varieties for the crop or within a market class during the previous year, based on crop insurance data. These checks will change as the popularity of varieties changes.
Exercise caution when making yield comparisons among varieties. Variety yield should only be directly compared to the standard reference check. Actual head-to-head testing between other varieties may not have occurred. Small plot agronomic trials are expensive to grow and new varieties are registered every year. It’s simply impractical to grow all varieties at the same time. Following several years of data collection, the yield performance for a particular variety stabilizes relative to the check and further testing is no longer required. It’s for these reasons the check varieties are grown every year (ex: Carberry for CWRS wheat, AC Metcalfe for barley) and changes to these checks are infrequent. The “Overall Station Years of Testing” column provides an indication of the unbalanced nature of the dataset.
At least six site-years of yield data collected over two years are required prior to reporting the figures in this publication. For new varieties, Overall Yield is often the first indication of yield potential relative to the check. As additional data becomes available, yield performance is also expressed on the basis of environmental productivity (Yield Test Categories of Low, Medium, High, and Very High). Where there are less than six site-years of data for a yield column, an indication will be made that there is insufficient data to describe, symbolized by reporting an “XX”. Yield rankings among varieties can change substantially due to growing conditions. To reflect these differences, results from a test site which produced high yield in a particular year are placed into the database for ‘high’ yielding environments. The same site may contribute to the ‘low’ yield category in a drought year when yields are low. Consistent performance over all Yield Test Categories indicates a variety has environmental responses similar to the check and may have good yield stability over a wide range of environments. Scientific studies conducted on variety performance in Western Canada have shown that Yield Test Category analysis provides a more reliable indication of yield performance than results organized by geographic region.
The yield comparison tables have several features:
• Overall actual yield of the check (bushels per acre) based on all data available to the testing program is provided along with the number of station years of testing.
• The range in yield for each Yield Test Category is defined.
• Actual yield of the check in each Yield Test Category is reported.
• For varieties with sufficient data, the Overall Yield and performance in each Yield Test Category is expressed relative to the check.
To make effective use of the yield comparison tables, producers should set a realistic yield target for the season and determine where it fits within the Low, Medium, High and (in some cases) Very High Yield Test Categories. This approach facilitates matching of variety choice to expected productivity levels and is similar to that used when making decisions on other levels of inputs. Please note the actual yield levels indicated are from small plot trials, which may be 15 to 20 per cent higher than yields expected under commercial field production.
Based on feedback from producers, the six-category scale for maturity (Very Early, Early, Medium, Late, Very Late, Extremely Late) has been replaced with average differences in days, relative to the check. Be aware these are averages from several years over the vast agricultural production area of Alberta and that growth environment has a tremendous influence on maturity dates. Hot, dry conditions will compress the reported maturity differences just as cool, wet conditions will expand them. For example, a variety of CWRS wheat may mature in 98 days in Lethbridge but take 103 days in Edmonton. Likewise, a variety which is on average two days later maturing across the province may be only one day later in southern Alberta but could be three or more days later in a northern location.
Falling Number and Resistance to Pre-harvest Sprouting
Falling number is a measurement of the extent to which endosperm starch in the seed has been metabolized to simple sugars during the germination process. There are many inter-related genetic, environmental and management factors which influence seed germination prior to harvest. In general, conditions in which the crop is harvested soon after maturity prior to inclement weather will result in the retention of high falling number. Thus, the use of earlier maturing varieties with Good or Very Good pre-harvest sprouting resistance in short-season areas is usually an effective management decision for maintaining high quality. A rating for pre-harvest sprouting resistance is provided for most of the reported wheat varieties based on controlled environment conditions. These ratings reflect genetic differences. Varieties with Good or Very Good pre-sprouting resistance will normally retain their falling number for longer periods of time under cool, wet harvest conditions. However, even these varieties will initiate germination when mature and exposed to prolonged conditions favourable to sprouting, resulting in falling number reductions. Note that falling number can be reduced without visible signs of sprouting.
Seed Size and Plant Populations
Seed size within a crop kind will vary from variety to variety, requiring adjustment of seeding volumes to achieve desired plant populations. Some of the tables provide an average 1000 kernel weight (TKW) which can be used as a guide for variety differences. The best approach is to determine the 1000 kernel weight of the seed to be planted, germination rate, emergence mortality, and in the case of fall seeded crops, an estimate of winterkill. For more information and user-friendly seeding rate calculators which take into account these and other considerations, please see www.agric.gov.ab.ca/app21/ldcalc.
Plant Breeders’ Rights
Plant Breeders’ Rights (PBR) are a form of intellectual property rights by which plant breeders can protect new varieties in the same way an inventor protects a new invention with a patent. In 2015, Canada amended the PBR Act to bring it into conformity with UPOV91. Varieties protected under the previous legislation (UPOV78) are indicated with the logo, whereas those protected under the new UPOV91 legislation that are shown with the new logo. For more information on Plant Breeders’ Rights, please see www.pbrfacts.ca or the Canadian Food Inspection Agency website at www.inspection.gc.ca.
Variety Use Agreement
A few new varieties are participating in a Variety Use Agreement (VUA) pilot program. When producers purchase a VUA variety and then divert some of that grain at harvest for seed use and plant it the following spring, they will be invoiced a Variety Use Fee for use of the variety. Varieties in which a VUA applies are indicated with the logo. For more information please see the VUA website at www.seedvaluecreation.ca.
Variety Cancellation versus Reclassification
Variety cancellation (often referred to as deregistration) and variety reclassification are two distinct processes which have been subject to some confusion in recent years. Variety cancellation is a process in which the Canadian representative and breeder make a request to CFIA to cancel the registration of a given variety. Under the protocol, a three-year notification of cancellation period applies to all crop kinds except hybrid canola and rapeseed, which require a one-year notification period. This timeline provides the Canadian representative and breeder sufficient time to ensure seed stocks of the variety have been cleared from the marketplace and producers have been notified, well in advance, to clear seed from their operations. This facilitates planning and helps to minimize financial risk. Notifications are posted on Aug. 1 and the notification period is from that date forward. Following variety cancellation, varieties are removed from the appropriate Canadian Grain Commission Variety Designation List and are only eligible for the lowest grade available. For more information please visit the Canadian Food Inspection Agency website at www.inspection.gc.ca and the Canadian Grain Commission website at www.grainscanada.gc.ca.
In recent years, several wheat varieties have been reclassified, meaning they have been moved from one grain marketing quality class to another. This process was undertaken by the Canadian Grain Commission in consultation with industry to ensure the varieties designated to a class met the current quality definitions and reflected the expectations of end-use customers of Canadian wheat. Several years of advance notice is provided when this type of change takes place. It is important to note reclassification is not variety cancellation. Reclassified varieties may still be grown and receive grades under the class for which they are designated but must not be misrepresented by declaring their former class. Variety Designation Lists can be found at the Canadian Grain Commission website at www.grainscanada.gc.ca/en/grain-quality/variety-lists/.
Diseases, Seed Treatment and Seed Testing
• Disease ratings are compiled from various data sources in Alberta and other Prairie provinces.
• Loose smut resistance ratings for wheat will not be reported after 2020 as it’s no longer a registration requirement for wheat and routine testing has been discontinued.
• Treat rye and flax seed to control seedling blight, cereal seed for smuts and fusarium, seedling blight and the seed borne phase of virulent blackleg in canola.
• Wheat with Moderately Susceptible (MS) or Susceptible (S) ratings for common bunt should be treated with a systemic fungicide as low levels of infection will restrict marketability.
• Refer to labels for maximum storage periods of treated seed.
• Treated seed must not be fed to livestock, poultry, or wildlife, and cannot be sold for feed.
• Leaf spot ratings in the wheat tables are a combination of resistance to tan spot and septoria leaf disease complex.
• Fusarium head blight (FHB), caused by Fusarium graminearum and other species, is an increasing problem in Alberta. The relative ranking of crops from most susceptible to least susceptible is durum wheat, spring and winter wheat, triticale, barley, and oat. Corn is a host of Fusarium graminearum and can serve as a source of infection when residue is left on the ground. FHB infection is highly influenced by the environment and heading date. A resistant (R) tolerance rating for FHB does not equate to immunity. Under severe epidemics, all varieties will sustain damage. All seed should be tested for the presence of FHB and treated with an appropriate seed treatment. Producers are advised to choose varieties with the best FHB tolerance whenever possible and always use best management practices to slow the spread of this disease.
• Seed used in the Alberta Regional Variety Testing program comes with a “fusarium-free” certificate and trials are inspected for FHB during the growing season.
Laboratories participating in the FHB testing program:
• 20/20 Seed Labs Ltd., Nisku, AB: 1-877-420-2099
• SGS Canada Inc., Sherwood Park, AB: 1.800.952.5407
• SGS Canada Inc., Grande Prairie, AB: 1-877-532-8889
• Precision Seed Testing, Beaverlodge, AB: 1-780-354-2259
• Seed Check Technologies Inc., Leduc, AB: 1-780-980-8324
Agronomic Practices Used in Small Plot Trials
Small plot trials are conducted using the following best agronomic practices:
• N, P, K and S fertilizer rates are based on soil test results for 1.25x the area average yield goal of the past 4 years, as reported in the AFSC Yield Alberta publication.
• All wheat, barley and oat seed are treated with Cruiser Maxx Vibrance Cereals. Triticale is treated with Dividend XL RTA. Flax seed is not treated.
• Seeding rates are adjusted for TKW and germination to reach the following target plant populations listed in Table 1.
- Foliar fungicides are not applied to the trials which allows for expression of genetic differences between cultivars for their disease resistance. Under disease pressure, the application of a foliar fungicide may significantly increase yields on some cultivars.
Abbreviations and Rating Scales
- TKW = Thousand kernel weight
- XX = Insufficient data to describe
- Resistance Ratings: VP = Very Poor, P = Poor, F = Fair, G = Good, VG = Very Good, EX = Excellent
- Disease Tolerance Ratings: R = Resistant, MR = Moderately Resistant, I = Intermediate, MS = Moderately Susceptible, S = Susceptible
- Kernel Type (winter wheat): HR = Hard Red, SR = Soft Red, HW = Hard White, SW = Soft White
- Awns (wheat): Y = Yes (bearded), N = No (awnless)
- Awn Type (barley): R = Rough, S = Smooth, SS = Semi-smooth
- Seed Size (flax): S = Small, M = Medium, L = Large
- Protected under UPOV78 Plant Breeders’ Rights legislation.
- Protected under UPOV91 Plant Breeders’ Rights legislation.
- Variety Use Agreement applied
Fact sheet information and tables prepared, reviewed and approved by Alberta Regional Variety Advisory Committee (ARVAC)
Data preparation and factsheet coordination by Alex Fedko, coordinator RVT/crop research technologist at Alberta Agriculture and Forestry