2013
Drought Tolerant Varieties for the Midwest and South: Building on Success (Year 3 of 1213)
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Contributor/Checkoff:
United Soybean Board
Category:
Sustainable Production
Keywords:
(none assigned)
Parent Project:
Drought Tolerant Varieties for the Midwest and South: Building on Success (Year 1 of 1213)
Lead Principal Investigator:
Tommy Carter, North Carolina State University
Co-Principal Investigators:
T W Rufty, North Carolina State University
Larry C Purcell, University of Arkansas
Thomas R Sinclair, University of Florida
H Roger Boerma, University of Georgia
Zenglu Li, University of Georgia
James Orf, University of Minnesota
Pengyin Chen, University of Missouri
Felix Fritschi, University of Missouri
James Specht, University of Nebraska
+8 More
Project Code:
1320-532-5613
Contributing Organization (Checkoff):
United Soybean Board
(n/a)
Institution Funded:
USDA/ARS-NCSU
(n/a)
Brief Project Summary:

Unique Keywords:
#environmental stress
Information And Results
Project Deliverables

1. Develop and characterize breeding lines of Midwestern and Southern maturity that are slow-wilting, continue to fix Nitrogen, and show superior yield under drought.
• Evaluate 7000 field plots to identify slow-wilting and/or high yielding
breeding lines under drought in NC, AR, KS, NE and MN.
• Test 20 advanced drought tolerant breeding lines in regional trials to gather
data for possible release variety release.
• Release breeding line N05-7432 as the first drought tolerant cultivar.

2. Identify genes that enhance slow wilting, nitrogen fixation, and yield under stress using QTL and NIL techniques.
• Initiate marker assisted selection for 3 QTL from PI 471938 and 5 QTL from PI 416937 and validate DNA mapping results for slow wilting trait.
• Develop near isogenic lines for prolific rooting and begin validation of QTLs.
• Continue assaying a QTL population for improved N fixation.

3. Identify physiological and morphological basis for drought tolerance; develop improved screening methods, make recommendations for deployment.
• Determine aquaporin protein relation to slow wilting, identify aquaporin genes. This work is attracting the interest of scientists from many crops
• Continue identifying deep rooting soybean types in the field.
• Assay approximately 2000 plant samples from field experiments for N concentration, ureide concentration, nodule number/size, and/or carbon isotope discrimination.

4. Identify and characterize resistance to environmental stresses which may be associated with drought: flood tolerance; resistance to soil deficiencies in Iron and Manganese. Compare slow-wilting types for flood tolerance and flood tolerant types for slow wilting. Identify QTL for resistance to Mn deficiency and IDC.
• Compete DNA (QTL) mapping of resistance to Mn deficiency in a population of Cook x SC97-1821. Validate the economic importance of resistance to Mn deficiency in affected soils.
• Continue flood tolerance screening, map DNA markers for flood tolerance.
• Continue IDC screening.

5. Aid industry through tech transfer of drought technology from the public sector.

• Continue extensive collaboration with private industry to test the efficacy of USB derived drought tolerance genes in elite commercial varieties.
• Train private breeders in drought tolerance breeding methodology.
• Transfer desirable genetic materials to industry via Materials transfer Agreements (MTAs) and germplasm and variety releases.
• Plan formal workshops with private companies re drought tolerance.
• Continue speaking engagements to increase visibility of USB drought work.

Final Project Results

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.