Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/2007
Publication Date: 12/1/2007
Citation: Holbrook Jr, C.C., Cantonwine, E., Sullivan, D.G., Guo, B., Wilson, D.M., Dong, W. 2007. Development of Peanut Germplasm with Improved Drought Tolerance. Proc. Amer. Peanut Res. and Educ. Soc. 39:21. Interpretive Summary: not required
Technical Abstract: We have observed significant reductions in preharvest aflatoxin contamination (PAC) in peanut genotypes with drought tolerance. These sources of resistance to drought and PAC have been entered into a hybridization program. They have been crossed with cultivars and breeding lines that have high yield, acceptable grade, and resistance to tomato spotted wilt virus (TSWV). This has resulted in the development of breeding lines with relatively high yield and relatively low aflatoxin when grown under heat and drought stress. We are releasing C76-16 as peanut germplasm with improved resistance to drought and aflatoxin contamination. We continue to looks at new approaches which could be used to accelerate our breeding progress for drought tolerance. During the past year we evaluated epidermal conductance as a potential drought tolerance trait. Unfortunately, the genetic variation in epidermal conductance does not appear to be large enough to be useful in our breeding program. More promising results have been observed in the use of ground-based remote sensing of canopy reflectance as a indicator for drought tolerance.