Foliar solanidine glycoside levels inSolanum tuberosum populations selected for potato leafhopper resistance |
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| Authors: | L L Sanford K L Deahl S L Sinden T L Ladd |
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| Institution: | 1. U.S. Department of Agriculture, Agricultural Research Service, Plant Science Institute, Vegetable Laboratory, 20705, Beltsville, MD
2. U.S. Department of Agriculture, Agricultural Research Service, Application Research Technology Unit, Ohio Agricultural Research and Development Center, 44691, Wooster, OH
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| Abstract: | Solanum tuberosum L. Gp. Tuberosum populations that had been recurrently selected for resistance to potato leafhopper,Empoascafabae (Harris), were tested for levels of foliar solanidine glycosides. Leafhopper infestation level was 57% lower than for the unselected population after seven generations of selection. The mean concentrations of foliar solanidine glycosides significantly (P<05) increased from 40 mg/100 g fresh weight (fw) in the unselected population to 65 mg/100 g fw in the population developed from seven generations of selection for leafhopper resistance. The linear relationship between the level of leafhopper infestation and the concentration of foliar solanidine glycosides among population means was significant (P<01) and negative (r=?0.85). |
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