Researchers Target Soybean Disease With Genetic Resistance Study

When conditions are just right, sudden death syndrome (SDS) of soybean can cause significant damage and yield loss in crops. University of Illinois researchers studying resistance to SDS will be on hand to share new information on controlling the disease through genetic resistance at this year’s Agronomy Day on August 14.

Cool and wet conditions at planting can put soybean crops at risk for SDS. “This disease has been a problem in Illinois in the past, and the potential is there for it to be a problem this year,” said Lillian Brzostowski, a U of I crop sciences graduate research assistant. “SDS is one of those diseases where it might not occur every year, but when environmental conditions are right, growers can have problems. We had a pretty cool, wet spring, and that’s when the fungus likes to get in the seedling roots.”

Brzostowski will discuss findings from a multiyear trial evaluating genes in soybean that confer some resistance to SDS. Though some genes that confer resistance have already been identified by soybean breeders, Brzostowski said the hope is to find out what genes provide the most resistance when incorporated into multiple genetic backgrounds.

Fusarium virguliforme, the fungus behind SDS, is a soil-borne pathogen that infects soybean early in the season, which, Brzostowski said, makes methods such as tillage, crop rotation, or fungicides ineffective at limiting disease symptoms.

“Once this fungus colonizes the roots, there is no spray for it. There is no quick fix. Once your plants are planted in the field, there’s nothing you can do about it,” she said.

Because of this, the most effective way of controlling the disease is through breeding for genetic resistance.

As part of the study, Brzostowski explained that three genes that are known to confer some resistance were incorporated into multiple, high-yielding lines representing different maturity groups. Lines were planted in Urbana, southern Illinois, and Michigan.

“One thing about this disease that is especially troubling is that it tends to pop up in fields that have the highest yield potential and that are irrigated because these plants in these fields are photosynthesizing very well, and that means that the toxin the fungus makes can move through the plant more efficiently,” Brzostowski said.

At planting, the researchers inoculate the soil with the fungus in order to bring about as many foliar symptoms of the diseases as possible. Ratings are then taken on which lines showed the worst or least symptoms of the disease.

Through the trials, the researchers have been successful at confirming a gene that would be a “good candidate” for breeders to use in improving resistance to SDS. The gene (mapped to chromosome 17) was grown and observed in trials both in Urbana and Michigan in 2012 and 2013.

“We have seen success with this gene across genetic backgrounds,” Brzostowski said. “The differences in what we’re seeing aren’t huge, but looking at them statistically, it’s significant.”

If this gene continues to show success across multiple environments, the researchers will start incorporating it into breeding material.

“The hope is that maybe we can find multiple genes that could be stacked together,” Brzostowski said. “The thing about SDS resistance is that it’s not just one gene, it’s many genes that have a small effect. We want to identify as many genes as we can to have more options for resistance and then put them together to give the growers the best resistance possible.

“Now even the most resistant commercial variety will show SDS symptoms if the conditions are right. A resistant line is going to do better than a susceptible line, though, because SDS can really do a number on a susceptible line,” she added.

Brzostowski explained that SDS is one of the top five causes of yield loss, disease-wise, in soybean. If a crop is infected with the disease, the researcher said yield losses could be anywhere from 5% up to 80 or 90%, with typical losses of 15 to 20%.

Early symptoms of the disease tend to show up just after the flowering stage as scattered spots appear on the leaves of the plant, giving a mottled look.

The 58th annual Agronomy Day will take place on U of I’s Urbana-Champaign campus. Agronomy Day attracts nearly 1,000 people each year seeking the latest information on technology and techniques to improve food and fuel production. For more information on speakers and displays, “like” University of Illinois Agronomy Day on Facebook, or visit the Agronomy Day Website.

Source: Illinois Ag Connection

Leave a Reply

Fungicides Stories

Soybean Closeup
FungicidesFMC Begins Registration Process For New Fungicide Active Ingredient
October 19, 2016
FMC Agricultural Solutions has begun the joint U.S. EPA and Canadian Pest Management Regulatory Agency registration process for bixafen, a new Read More
Soybean Field
FungicidesSyngenta Launches Interactive Tools For Vibrance Seed Treatment Fungicide
August 30, 2016
As part of the ongoing commitment to provide growers and retailers with the most current crop protection products and agronomic Read More
Frog eye leaf spot on soybean
FungicidesNew FMC Website Provides Season-Long Updates On Fungicide Plots
July 7, 2016
Grow Forward with FMC Fungicides is a plot initiative in key corn and soybean producing regions showcasing fungicides from FMC. Read More
Wheat Field North Dakota
Crop InputsTrivapro Fungicide Yield Results Elevate 2016 Crop Outlook
May 10, 2016
As growers evaluate business models and consider their 2016 management plans, strong first-year trial results for Trivapro fungicide from Syngenta Read More
Trending Articles
Matt Hopkins15 Twitter Accounts Every Ag Professional Must Follow
October 13, 2016
What do singer Katy Perry and the President of the United States have in common? They are two of the Read More
AGCO RG700 cab
OpinionRoadblocks To Precision Ag Innovation
October 5, 2016
On August 29, I got to preside over the PrecisionAg Innovation Series event, “Game-Changing Advances in Precision Farming Technology,” developed Read More
J.C. Ramsdell containment system
EquipmentClear Opportunity In The Tank Market
October 4, 2016
Crop prices may be down, but steel prices are too — and that’s good news for retailers looking to add some Read More
WinField booth Farm Progress
Special ReportsTalking Weed Management Strategies At Farm Progress 2016
October 2, 2016
The annual Farm Progress Show — this year staged in Boone, IA — is always a great place to catch Read More
Corn Field
Eric SfiligojFacing Ag Industry Challenges
September 26, 2016
At the 2016 annual Mid America CropLife Association (MACA) meeting in September, a pair of crop protection company representatives discussed Read More
Bayer Monsanto
Crop InputsBayer-Monsanto Mega-Merger: 6 Things You Need To Know
September 14, 2016
Mega mergers have become almost routine in the agricultural industry. Right on the heels of Monday’s news that fertilizer giants Potash Read More
Latest News
Stewardship4R Nutrient Stewardship Certification Program To Launch…
October 26, 2016
The 4R Nutrient Stewardship Certification Program will expand the voluntary retailer program to the full state of Ohio, allowing nutrient Read More
AGCO RG700 at the 2015 National Farm Machinery Show
EquipmentAGCO Parts Rolls Out No-Interest, No-Payments Offer Via…
October 26, 2016
AGCO Corp. is now offering an innovative financing solution on qualifying Parts and Service transactions. Now through December 31, 2016, Read More
Soybean field
Crop InputsIncotec Invests In North America
October 25, 2016
Leading seed enhancement company Incotec, part of Croda, has announced an investment in their North America business. The total investment of Read More
Patriot 25th anniversary
SprayersCase IH Celebrates 25 Years Of Patriot Sprayers At Bens…
October 24, 2016
Case IH executives, employees and special guests celebrated 25 years of production of Case IH Patriot sprayers in a special Read More
4r Nutrient stewardship
StewardshipNominations For The 4R Advocate Program Due October 31
October 24, 2016
Nominations for the 4R Advocate program are due to The Fertilizer Institute by October 31, 2016. The program recognizes agricultural Read More
Corn close up
Eric SfiligojProtecting Agriculture’s Ability To Feed The World
October 24, 2016
The rate of change coming to agriculture is growing, and will continue to do so for the foreseeable future. This Read More
Student Young Worker CHS
CropLife 100CHS Supports #FirstJob Compact
October 24, 2016
CHS joins the White House and many of the country’s largest employers in signing a new initiative centered on helping Read More
Kennebec Grain terminal
CropLife 100Wheat Growers Kennebec Facility Loads First Rail Cars
October 21, 2016
In a season of firsts for Wheat Growers’ Kennebec Grain Terminal, the first 115-car unit train was loaded with soybeans Read More
ManagementThe Latest Dow-DuPont Rumor, Product of the Year Voting…
October 20, 2016
CropLife Editor Eric Sfiligoj shares a new rumor about the Dow-DuPont merger and updates on two CropLife-driven programs, the CropLife Read More
Soybean Closeup
FungicidesFMC Begins Registration Process For New Fungicide Activ…
October 19, 2016
FMC Agricultural Solutions has begun the joint U.S. EPA and Canadian Pest Management Regulatory Agency registration process for bixafen, a new Read More
Soil Young Corn
Industry NewsAgribusiness Search Firm Appoints New Managing Partner
October 18, 2016
Morris Bixby Group, a leading agribusiness search firm providing the highest quality professional recruiting and career advancement services since 2000, Read More
Wheat Field North Dakota
FertilizerUnited Suppliers Acquires Kansas Fertilizer Business
October 17, 2016
United Suppliers, Inc. has purchased the assets of Evans Enterprises, LLC, an ammonium chloride fertilizer business based in Olathe, KS. Read More
Corn Field
Industry NewsFMC Launches New Operations In Argentina, Exits Joint V…
October 17, 2016
FMC Corp. has exited its joint venture with Ruralco Soluciones S.A. FMC has launched new commercial operations, FMC Quimica S.A., Read More
Dow AgroSciences
InsecticidesRenewed Registration Issued For Products Containing Sul…
October 17, 2016
On October 14, 2016, the U.S. EPA re-established the registration of products containing sulfoxaflor (Isoclast Active), including Transform WG, Closer Read More
Eric SfiligojThe Whys Of Agriculture
October 17, 2016
During 2016, there have been myriad challenges facing the whole agricultural industry. Such wide ranging issues as water protection, sustainable Read More
Young Corn Field
FertilizerImproved Phosphorus Management Essential To Feeding Wor…
October 14, 2016
With a global population expected to reach 9 billion people by 2050, improved management of key essential nutrients such as Read More
ManagementHarvest and Crop Price Updates; EPA and Crop Protection…
October 13, 2016
Glyphosate and atrazine get public comment support from ARA as each is reviewed by EPA, and the latest on the Read More
Matt Hopkins15 Twitter Accounts Every Ag Professional Must Follow
October 13, 2016
What do singer Katy Perry and the President of the United States have in common? They are two of the Read More