Abstract
Glycoalkaloid content in tubers of 77 F 1 -hybrids derived from Solanum tuberosum ssp. tuberosum and 6 different wild species depends to a high degree on the wild species used for crossing. In most cases offsprings from crosses with S. aracc-papa , S. vernei and S. sparsipilum produced more glycoalkaloids (12–168 mg/100 g fresh weight) than offsprings from crosses with S. oplocense and S. spegazzinii (6–56 mg/100 g fresh weight). I3ackcrosses with cultivars on the basis of this F 1 -hybrids resulted in a significant decrease of glycoalkaloid level after the second backcross. However, it is possible that even after the 4th backcross clones with a high content of glycoalkaloids can be found. No relationship existed between the degree of resistance to G. rostochiensis and G. pallida and the glycoalkaloid content of tubers in the investigated populations.
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