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Title: Phenotyping the RIL Population of Tifrunner x C76-16 for Drought Tolerance in Peanuts

item Dang, Phat
item CARTER, JOSHUA - Auburn University
item Sorensen, Ronald - Ron
item Lamb, Marshall
item Butts, Christopher - Chris
item Holbrook, Carl - Corley
item ISLEIB, TOM - North Carolina State University
item OZIAS-AKINS, PEGGY - University Of Georgia
item CHU, YE - University Of Georgia
item CHEN, CHARLES - Auburn University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 9/18/2014
Publication Date: 9/14/2014
Citation: Dang, P.M., Carter, J., Sorensen, R.B., Lamb, M.C., Butts, C.L., Holbrook Jr, C.C., Isleib, T., Ozias-Akins, P., Chu, Y., Chen, C. 2014. Phenotyping the RIL Population of Tifrunner x C76-16 for Drought Tolerance in Peanuts. International Conference on Advances in Arachis through Genomics & Biotechnology.

Interpretive Summary: none required

Technical Abstract: Increasingly warmer and drier conditions in the southeastern United States pose problems for peanut production, especially where irrigation is not available. ‘C76-16’, an advanced breeding line, has been identified as a unique drought tolerant source for peanut breeding programs. The RIL population derived from the cross of ‘Tifrunner’ x ‘C76-16’ should be useful in identifying QTLs underlying drought tolerance in peanut. The 156 RILs were planted in a plot of 76 cm length and 76 cm row spacing in environmental controlled rainout shelters at Dawson, GA using augmented design in 2013 and 2014. The drought treatment begun at 60 DAP (Date After Planting). Various measures were used to estimate response to water deficit, including relative water content (RWC), specific leaf area (SLA), leaf density moisture content (LDMC), visual evaluation, and yield under drought stress. The results indicated the population segregated for the measured traits especially for yield under drought stress. A number of transgressive lines with enhanced drought tolerance, compared to ‘C76-16’, have been identified. Polymorphic markers between parents from 200 SSR candidate markers were identified and will be used for QTL identification. The feasibility of infrared images technology using in drought tolerance in peanut was explored in 2014 as a potential selection tool.