Submitted to: Agronomy Abstracts
Publication Type: Abstract only
Publication Acceptance Date: 10/1/2001
Publication Date: 11/1/2001
Citation: Cornelious, B., Reyna, N., Sneller, C., Shannon, G., Vantoai, T.T. 2001. Evaluation of flood tolerance genes and germplasm in soybean. Agronomy Abstracts. Interpretive Summary:
Technical Abstract: Saturated soils (flooding) can greatly reduce soybean yield. A QTL allele for tolerance to flooding has been identified in the variety 'Archer'. We used the SSR marker Sat_064 to create sets of near-isogenic lines (NILs) for the QTL from F5 populations of Archer x southern cultivars. The NILs were grown under flooded (7 to 12 cm above the surface soil for two weeks starting at flowering, R2) and normal conditions at three environments in Arkansas and Missouri and evaluated for yield and visual flood injury. Checks and recombinant inbred lines (RILs) derived from the same crosses used to create the NILs were also tested. The marker for flood tolerance did not have a significant effect on any trait in the NILs, though there was considerable variation for flood tolerance among the sets. Significant differences for flood tolerance based on yield or injury were also noted among the RILs. The best RILs suffered a 37-45% yield decrease due to the flood treatment while showing minimal injury. The worst RILs suffered a 75-82% yield decrease and 70% mortality. These Archer-derived populations segregated for flood tolerance, yet Sat_064 did not account for any of the variation. This may be due to the southern genetic backgrounds and environments as the Sat_064 QTL was originally identified in northern genetic background and environments.