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Protein Content of Winter Wheat Varieties in Oklahoma — 2017–2018

General Information

Protein is just one of many attributes that determine 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 commonly exist, variability in protein content among environments is generally much larger than variability in protein content among varieties. Factors such as N fertility and drought stress, for example, can sharply impact final wheat protein content.


To reflect these management and environmental impacts on wheat protein content, data are 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, as this allows for easier comparison among varieties across locations. Doublestop CL Plus, for example, is a variety which showed a positive deviation from the location mean in 92 percent of this year’s trials, indicating it has a tendency for above-average wheat protein content. Iba, on the other hand, showed a negative deviation from the location mean in 91 percent of the trials, indicating a tendency for lower than average wheat protein content. However, protein quantity should not be used as a barometer for protein quality (i.e., dough strength and functionality). There are a few exceptions to this, with Doublestop CL Plus being one example of relatively high protein content and protein quality.


Adequate N fertility as recommended by a recent soil test or sensor-based nitrogen management program can help ensure that varieties such as Iba produce wheat or flour protein within the acceptable range for end-use customers. 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 Current Report CR-2165 Wheat and Flour Quality for Varieties Tested in OSU Variety Performance Tests



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 Current Report 2143 2017-2018 Oklahoma Small Grains Variety Performance Tests on the web at 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:

  • Afton - Greg Leonard
  • Altus – OSU Southwest Research and Extension Center
  • Alva – Jerad Bradt & Wes Mallory
  • Apache – Bryan Vail
  • Balko – Teryl Rorabaugh
  • 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
  • Marshall – Dean Fuxa
  • Thomas – Keith Miller & Bill Jackson
  • Union City – Don & Ray Bornemann
  • Walters – Jimmy Kinder


Participating Seed Companies

AgriMAXX Wheat
Matt Wehmeyer
7167 Highbanks Road
Mascoutah, IL 62258
Phone: (855) 629-9432
Variety: AM Eastwood


Steve Ahring
P.O. Box 7
Girard, KS 66743
Phone: (800) 962-5429
Varieties: AG Gallant, AG Icon, TAM 114


Colorado Wheat Research Foundation (PlainsGold)
Brad Erker
4026 S. Timberline Road. Ste. 100
Fort Collins, CO 80525
Phone: (970) 449-6994
Variety: Langin


CROPLAN by Winfield United
Paul Gregor
1080 County Road F West
Shoreview, MN 55126
Phone: (651) 375-6620
Variety: CP78-26


Dyna-Gro Seed
Ryan Klamfoth
Phone: (419) 310-6370
Variety: Long Branch


Kansas Wheat Alliance (KWA)
Daryl Strouts
1990 Kimball Ave.
Manhattan, KS 66502
Phone: (785) 320-4080
Varieties: Joe, Larry, Oakley CL, Zenda


Limagrain Cereal Seeds (LCS)
Drew Hendricker
2040 SE Frontage Road
Fort Collins, CO 80525
Phone: (970) 498-2218
Varieties: LCS Avenger, LCS Chrome, LCS Mint, LCS Pistol, T158


John Fenderson
1616 E. Glencoe Road
Stillwater, OK 74075
Phone: (620) 243-4263
Varieties: WB4269, WB4303, WB4458, WB4515, WB4721, WB-Grainfield, Winterhawk


Oklahoma Genetics Inc. (OGI)
Mark Hodges
P.O. Box 2113
Stillwater, OK 74076
Phone: (405) 744-7741
Varieties: Bentley, Doublestop CL Plus, Duster, Gallagher, Iba, Lonerider, Maton II, NF 101, NF 201, NF 402, Ruby Lee, Smith’s Gold, Spirit Rider, Stardust


AgriPro|Syngenta Seeds
Greg Gungoll
1517 Osage Ave.
Enid, OK 73703
Phone: (405) 714-2839
Varieties: Bob Dole, SY Achieve CL2, SY Benefit, SY Flint, SY Grit, SY Monument, SY Rugged


Watley Seed
Andy Watley
Box 51
Spearman, TX 79081
Phone: (806) 659-3838
Varieties: TAM 112, TAM 204


David Marburger
Small Grains Extension Specialist


Robert Calhoun
Senior Agriculturalist


Brett Carver
Wheat Breeder


Branden Watson
Graduate Research Assistant


Christopher Gillespie
Graduate Research Assistant

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