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Title: Phenotyping a RIL Population for Middle-Season Drought Resistance in Cultivated Peanut

item CARTER, J - Auburn University
item Dang, Phat
item Sorensen, Ronald - Ron
item Lamb, Marshall
item Holbrook, Carl - Corley
item ISLEIB, T - North Carolina State University
item CHU, Y - University Of Georgia
item OZIAS-AKINS, P - University Of Georgia
item CHEN, C - University Of Auburn

Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 4/1/2015
Publication Date: N/A
Citation: N/A

Interpretive Summary: none required.

Technical Abstract: A RIL population of 150 genotypes, resulting from the cross of “Tifrunner” and “C76-16,” was examined for middle-season drought tolerance over two different growing seasons, using an augmented experimental design. Plants were grown in environmentally-controlled rainout shelters and phenotyped using yield specific leaf area (SLA), visual ratings, and infrared photography. SLA measurements were taken before drought, after drought, and after recovery. Of these three times, it was determined that SLA measurements taken after recovery demonstrated the strongest correlation with yield for this population (r = -0.23, p = 0.0027). Heritability estimations were calculated for yield under drought stress (h=0.20) and irrigation condition (h=0.32), respectively. The top tolerance and susceptible lines from the population were identified for the highest and lowest yielding genotypes across both years and treatments, which will be critical genotypes for further genomic research on drought tolerance in peanuts.