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Predicted and observed tuber color, sorted by genotype, in F1 progeny of crosses between transgenic Prince Hairy and Chieftain. a, b The PCR assays used to genotype at R/dfr and D, respectively. c, d Predicted and observed tuber color for each genotype where the transgene is the ‘red allele’ of dfr in (c), and an empty vector in (d). Representative tubers for each genotype are shown on the right side of panels (c) and (d)
