Throughout history, plant diseases have had devastating impacts on human lifestyle leading to starvation and immigration. Thanks to the work of plant breeders, many diseases, like stem rust in wheat, which once devastated South Dakota’s wheat growers, is controlled today, says Bob Fanning, SDSU Extension Plant Pathology Field Specialist.
He adds that although today’s gene pool of high-yielding wheat germplasm resistant to stem rust is quite large, this wasn’t always the case.
“In 1897, at its peak, it has been stated that two-thirds of the world’s wheat was shipped from present-day Eureka. Wagons bearing the crop rolled in from as far as 75 miles away,” Fanning said.
Stem rust quickly put a stop to wheat’s rapid growth in South Dakota, says Fanning.
“In 1904 an epidemic of stem rust reduced South Dakota’s wheat production by 50 percent. For the next several decades, planted wheat acres were high, but rusts and scab plagued wheat farmers, nearly wiping out the crop in 1920,” he said. “Wheat farmers across the world were experiencing similar challenges, causing poverty and hunger.”
It was during this time that Fanning says, Edgar McFadden was coming of age. Born in 1891 near Webster, McFadden was 20 years of age, when he watched the 1911 wheat crop reduced from 40 bushel an acre potential to 5 bushels an acre because of stem rust.
“At the same time, he noticed that the rust hadn’t bothered a patch of ‘Yaroslav emmer,’ an ancient grain crop,’” Fanning said. “When he enrolled in the Dakota Agricultural College, now South Dakota State University, that fall, he wondered if ‘emmer’ crossed with wheat would provide rust resistance in the progeny.”
In short, Fanning says McFadden successfully crossed “emmer” and the spring wheat variety, “Marquis,” to eventually produce the variety, “Hope,” which was resistant to both stem and leaf rusts.
“Magazines of the 1940’s reported that perhaps 25 million people across the world escaped death by starvation due to bread derived from McFadden’s rust resistant wheat, “Hope,’” said Fanning.
Many of today’s wheat varieties have Hope as a great-grandparent.
The semi-dwarf characteristic was recognized by Borlaug as being critical to produce wheat that didn’t lodge under high yields.
“Norman Borlaug is credited with saving more than a billion people from starvation by helping people across the world increase their wheat production,” Fanning said. “Norman Borlaug was a Plant Pathologist, but also proved to be a good breeder.”
To learn more about McFadden and Borlaug, and the impact they had on the wheat industry, visit iGrow.org for links to articles and YouTube videos on the men.