The “amber waves of grain” are a patriotic staple of the American summer, painting a familiar slice of Americana across the horizon. While rolling fields of hard red winter wheat have long defined the landscape of the Plains, researchers at Oklahoma State University (OSU) are beginning to change that picture with a wheat variety that is anything but ordinary.
Known as OSU P92, this variety stands out for its deep purple hue and its potential to revolutionize the nutritional profile of staple foods.
A Class of Its Own
For decades, Oklahoma’s wheat industry has been built on hard red winter wheat and the occasional hard white variety. However, according to Brett Carver, Professor of Plant and Soil Sciences at OSU, their latest development represents a departure from the status quo.
“This is not just any other new wheat variety,” Carver explains. “It’s very different. We normally talk about hard red winter wheat... but this is not either one of those. This is a class we don’t even have.”
While the crop may grow and behave like the hard red winter wheat farmers are used to, it is actually a new innovation known as “purple wheat.” The grain boasts a deep purple hue on its outer layer, but the real breakthrough lies beneath the surface.
The Science Behind the Color
The unique appearance of OSU P92 is driven by anthocyanins, which is the same class of phenolics that provide the vibrant colors in blueberries, blackberries, black beans, and peppers. By bringing these compounds into a grain staple, OSU is bridging the gap between traditional row crops and high-antioxidant superfoods.
“Those colors come from a compound called anthocyanins,” says Carver. “So this purple wheat has those anthocyanins that would be present in common fruits and vegetables. That benefit we get from eating the fruits and vegetables also come now through the wheat.”
Breeding for the Real World
Creating a nutritionally superior grain is one thing, but making it viable for a commercial farm is another. The development process was far from simple. Researchers had to breed a variety that could handle Oklahoma’s volatile climate, resist local diseases, and still deliver the strong yields that keep farmers profitable.
To achieve this, Carver’s team had to look beyond traditional plant breeding. “Doing all these extra things meant we had to branch out a little bit because we just don’t have the expertise to measure phytochemicals,” Carver says.
The team leaned heavily on the expertise of OSU’s Nutritional Science Department. Notably, Carver credits a student researcher for driving the project forward, stating that her findings directly influenced the decision on how to advance the variety.
Stability from Field to Table
One of the biggest hurdles in developing purple wheat was ensuring the color, and the nutrients they bred into the wheat, lasted. Anthocyanins are notoriously unstable, but the team eventually selected a line that maintained its integrity.
“To maximize the color at harvest, we want to make sure we have that deep color that persists,” Carver notes. “With these compounds, they aren’t the most stable. But with this one, it’s one of our more stable colors.”
What’s in the Name?
While the variety is groundbreaking, its name remains humble: OSU P92. The “P” stands for purple, and “92" was its experimental selection number. Carver says the goal wasn’t to have a flashy name, but to let the performance and the final products—like breads and tortillas—take center stage.
If OSU P92 delivers on its promise of high performance and enhanced nutrition, it could do more than just change the color of the fields; it could redefine what farmers grow to meet the demands of health-conscious consumers.
