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R8-mediated broad-spectrum resistance in field trials. Bintje spreader rows were derived from seed tubers. Desiree and Desiree transgenics were planted from in vitro culture. For this reason, at the onset of the natural late blight epidemic, the Bintje plants were much taller than the Desiree and R8 transgenics (Desiree:R8). This explains the difference in the height of the deceased Bintje and Desiree plants, while the R8 transgenics kept growing
