General Information

Protein is just one of many attributes that determines end-use quality and marketability of winter wheat. In fact, some millers and bakers would argue that functionality of wheat protein is more important than the quantity of protein. While varietal differences exist, variability in protein among environments is generally much larger than variability among varieties. Factors such as nitrogen (N) fertility and drought stress, for example, can sharply impact final protein wheat content.

To reflect these management and environmental impacts on wheat protein content, data is reported by variety and location in Table 1. In Table 2, we report the wheat protein content by variety as a deviation from location mean, this allows for easier comparison of wheat protein among varieties across locations. Doublestop CL Plus, for example, showed positive deviation from the location mean in 95 percent of this year's trials, indicating a tendency for above-average wheat protein content. Iba, on the other hand, showed a negative deviation from location mean in 90 percent of the trials, indicating a tendency for lower than average wheat protein content. Adequate N fertility as recommended by a recent soil test or sensor-based N management program can help ensure that varieties with low average protein produce wheat or flour protein within the acceptable range for end-use customers.

However, protein quantity should not be used as a barometer for protein quality (i.e., dough strength and functionality). Although, there are few exceptions to this, with Doublestop CL Plus being one example. Iba is also a prime example of how protein data can sometimes be misused, as the functionality of the protein in Iba is above average, which can offset lower absolute protein content. More information on end-use quality is available in CR-2165 Wheat and Flour Quality for Varieties Tested in the 2016 OSU Variety Performance Tests.

Procedures

Approximately 600-gram subsamples of wheat grain were collected from the OSU Wheat Variety Performance Test plots at harvest. These plots were well-fertilized and managed according to OSU Cooperative Extension recommendations. Additional information on test locations and management practices is available in CR-2143 2018-2019 Oklahoma Small Grains Variety Performance Tests on the web at www.wheat.okstate.edu. Samples were stored in plastic containers for approximately one month following harvest. Samples were nondestructively analyzed for protein content on a 12 percent moisture basis using a Diode Array Near Infrared instrument (NIR) (model DA 7200, Perten Instruments, Sweden).

Funding provided by:

Oklahoma Wheat Commission

Oklahoma Wheat Research Foundation

Oklahoma Cooperative Extension Service

Oklahoma Agricultural Experiment Station

Entry fees from participating seed companies 

We sincerely thank our variety trial cooperators for donation of land, time and resources. Variety trial cooperators include:

• Altus – OSU Southwest Research and Extension Center
• Alva – Jerad Bradt & Wes Mallory
• Apache – Bryan Vail
• Balko – Kenton Patzkowsky
• Buffalo – NRCS
• Cherokee – Kenneth Failes
• Chickasha – OSU South Central Research Station
• Goodwell – Oklahoma Panhandle Research and Extension Center
• Homestead – Brook Strader
• Hooker – Dan Herald
• Keyes – J.B. Stewart
• Kildare – Don Schieber
• Kingfisher – Tary Helt
• Lahoma – OSU North Central Research Station
• Lamont – Don & Roger Kirby
• Thomas – Keith Miller & Bill Jackson
• Union City – Don & Ray Bornemann
• Walters – Jimmy Kinder

Table 1. Wheat protein content (12 percent moisture basis) of varieties and experimental lines tested in the 2018-2019 Oklahoma Wheat Variety Performance Tests.

Note: underline values are not statistically different from the greatest value within a column (i.e., location).

Continue Table 1. Wheat protein content (12 percent moisture basis) of varieties and experimental lines tested in the 2018-2019 Oklahoma Wheat Variety Performance Tests.

 Note: underline values are not statistically different from the greatest value within a column (i.e., location).

Table 1. Wheat protein content (12 percent moisture basis) of varieties and experimental lines tested in the 2018-2019 Oklahoma Wheat Variety Performance Tests (cont'd).

Note: underline values are not statistically different from the greatest value within a column (i.e., location).

Contenue Table 1. Wheat protein content (12 percent moisture basis) of varieties and experimental lines tested in the 2018-2019 Oklahoma Wheat Variety Performance Tests (cont'd).

Note: underline values are not statistically different from the greatest value within a column (i.e., location).

Table 2. Wheat protein content relative to the location mean (expressed as a deviation) for varieties and experimental lines in the 2018-2019 Oklahoma Wheat Variety Performance Tests. 

Contenue Table 2. Wheat protein content relative to the location mean (expressed as a deviation) for varieties and experimental lines in the 2018-2019 Oklahoma Wheat Variety Performance Tests. 

Table 2. Wheat protein content relative to the location mean (expressed as a deviation) for varieties and experimental lines in the 2018-2019 Oklahoma Wheat Variety Performance Tests (cont'd).

Conetnue Table 2. Wheat protein content relative to the location mean (expressed as a deviation) for varieties and experimental lines in the 2018-2019 Oklahoma Wheat Variety Performance Tests (cont'd).

Participating Seed Companies

AgriMAXX Wheat Company
Matt Wehmeyer
7167 Highbanks Road
Mascoutah, IL 62258
Phone: 855) 629-9432
Email: matt@agrimaxxwheat.com
www.agrimaxxwheat.com
Variety: AM Eastwood

AgriPro
Greg Gungoll
1517 Osage Ave.
Enid, OK 73703
Phone: (405) 714-2839
Email: greg.gungoll@syngenta.com
www.agriprowheat.com
Varieties: Bob Dole, SY Achieve CL2, SY Benefit, SY Flint, SY Grit, SY Monument, SY Razor, SY Rugged

AGSECO, Inc.
Steve Ahring
P.O. Box 7
Girard, KS 66743
Phone: (620) 724-6223
Email: steve@delangeseed.com
www.agseco.com
Varieties: AG Gallant, AG Icon, TAM 114

CROPLAN by Winfield United
Mark Torno
225 Marina Way
Garrison, ND 58540
Phone: (651) 375-6448
Email: MTorno@landolakes.com
www.winfieldunited.com/product/croplan-seed
Variety: CP7826, CP7869, CP7909

Dyna-Gro Seed
Shawn Carter
3492 Long Prairie Road Suite 200
Flower Mound, TX 75022
Phone: (318) 282-9804
Email: shawn.carter@nutrien.com
www.dynagroseed.com
Variety: Long Branch

Kansas Wheat Alliance (KWA)
Daryl Strouts
1990 Kimball Avenue Suite 200
Manhattan, KS 66502
Phone: (785) 320-4080
Email: kwa@kansas.net
www.kswheatalliance.org
Varieties: Joe, KS Venada, KS080093K-18, Larry, Zenda

Limagrain Cereal Seeds (LCS)
Drew Hendricker
2040 SE Frontage Road
Fort Collins, CO 80525
Phone: (970) 498-2218
Email: drew.hendricker@limagrain.com
www.limargraincerealseeds.com
Varieties: LCH15ACC7-7, LCS Chrome, LCS Pistol

Oklahoma Genetics Inc. (OGI)
Mark Hodges
201 South Ranger Road
Stillwater, OK 74074
Phone: (405) 744-4347
www.okgenetics.com
Varieties: Baker's Ann, Bentley, Doublestop CL Plus, Duster, Gallagher, Green Hammer, Iba, Lonerider, NF 101, Ruby Lee, Showdown, Skydance, Smith's Gold, Spirit Rider, Stardust

PlainsGold (Colorado Wheat Research Foundation)
Brad Erker/Tyler Benninghoven
4026 S. Timberline Road. Ste. 100
Fort Collins, CO 80525
Phone: (970) 449-6994
www.coloradowheat.org
Variety: Canvas, Crescent AX, Langin

Watley Seed
Andy Watley
Box 51
Spearman, TX 79081
Phone: (806) 659-3838
Email: watleyseed@windstream.net
www.watleyseed.com
Varieties: TAM 112, TAM 204

WestBred
John Fenderson
1616 E. Glencoe Road
Stillwater, OK 74075
Phone: (620) 243-4263
Email: john.m.fenderson@monsanto.com
www.westbred.com
Varieties: WB4269, WB4303, WB4418, WB4515, WB4595, WB4699, WB4792, WB-Grainfield