2014
Phase II – Continuing the Search of New Genetic and Genomic Resources in Soybean for Breeding Resistance to Sudden Death Syndrome (SDS) (Year 3 of 2218)
Contributor/Checkoff:
Category:
Sustainable Production
Keywords:
(none assigned)
Lead Principal Investigator:
Silvia Cianzio, Iowa State University
Co-Principal Investigators:
Ahmad Fakhoury, Southern Illinois University
Stella Kantartzi, Southern Illinois University
Khalid Meksem, Southern Illinois University
Jason Bond, Southern Illinois University at Carbondale
Burton Bluhm, University of Arkansas
Pengyin Chen, University of Arkansas
John Rupe, University of Arkansas
+6 More
Project Code:
1420-532-5618
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

Unique Keywords:
#breeding & genetics, #soybean breeding - disease resistance, #sudden death syndrome (sds)
Information And Results
Project Deliverables

• Cultivars
• Germplasm lines
• Molecular markers
• QTL

Final Project Results

1. In the past year, Southern Illinois University has released 2 SDS Group IV resistant varieties. University of Arkansas released two Group V resistant varieties and Iowa State University released two SDS resistant varieties and MTAs have been provided at the request of interested private companies. All 3 breeding programs in IL, AR and IA have advanced lines under evaluation for future potential release.
2. In collaboration with SDS-AFRI/USDA research at Iowa, 19 plant introduction lines were identified as highly resistant to SDS, and represent a new source of resistance and raw material to be tested in the breeding programs.
3. The number of MTAs has not been specified in any report or communications.
4. At Illinois, a quantitative trait loci (QTL) for SDS resistance have been identified and published, based on a high density single-nucleotide polymorphism (SNP) map developed from a population of three recombinant inbred lines (RIL) segregating for SDS. Additionally, the USDA/AFRI group have mapped a QTL that describes 40% (which is significant) of the genetic variation due to tolerance to the toxin produced by the SDS pathogen.
Additional research has been accomplished beyond the KPIs specified and these accomplishments are listed below:
5. At Iowa, a strain of the toxin (responsible for foliar symptoms) carrying the virulent FvTox1 gene was developed that can lead to its use as a screening tool. Also, several soybean proteins were identified that interact with the FvTox1 toxin of the pathogen that could lead to means to disarm the pathogen in the plant.
6. The IL group has uncovered a very general mechanism that may explain genetic resistance within the soybean plant.
7. Studies to determine the association of K fertilization (AR) or level of SCN (IA) with SDS have not shown a consistent interaction.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.